Regulatory Model Numbers

This appendix lists the Regulatory Model Numbers (RMNs), where applicable, for the product models for the switches described in this document.

Product Number(s)
Table 1. Regulatory Model Numbers and Product Numbers
Regulatory Model Number (RMN) Product Number(s)
AN1708 DCS-7280PR3-24, DCS-7280PR3K-24
AN1730 DCS-7280DR3-24, DCS-7280DR3K-24
AN1715 DCS-7280CR3-32P4, DCS-7280CR3K-32P4, DCS-7280CR3K-32P4A
AN1731 DCS-7280CR3-32D4, DCS-7280CR3K-32D4, DCS-7280CR3K-32D4A
AN1742 DCS-7280CR3-36S, DCS-7280CR3K-36S, DCS-7280CR3K-36A
AN1718 DCS-7280CR3-96 DCS-7280CR3K-96
AN1728 DCS-7280SR3-48YC8, DCS-7280SR3K-48YC8, DCS-7280SR3K-48YC8A
AN1741 DCS-7280SR3-40YC6, DCS-7280SR3E-40YC6
AN1760 DCS-7280DR3A-36, DCS-7280DR3AM-36, DCS-7280DR3AK-36
AN1770 DCS-7280DR3A-54,DCS-7280DR3AM-54, DCS-7280DR3AK-54
AN1743 DCS-7280TR3-40C6
AN1779 DCS-7280CR3A-24D12, DCS-7280CR3AM-24D12, DCS-7280CR3AK-24D12
AN1782 DCS-7280CR3A-48D6, DCS-7280CR3AM-48D6, DCS-7280CR3AK-48D6
AN1788 DCS-7280CR3A-72, DCS-7280CR3AM-72, DCS-7280CR3AK-72

Maintenance and Field Replacement

The following topics are covered in this section:

Considerations

Review the following considerations when installing the device.

  • All fans and power supplies are hot swappable.
  • The switch can be running while a power supply is being installed or removed, but the power supply being replaced must not be connected to a power source.
  • All slots must be filled or covered with a blank for operation (even though power supply or fans may not be functional).
  • Before you begin, refer to the Arista Networks document Safety Information and Translated Safety Warnings available at: https://www.arista.com/en/support/product-documentation.
    Note: Descriptions for the removal and replacement of power supplies and fans are for a representative power supply or fan. Locations of status indicator LEDs may differ. Refer to the front and rear panel illustrations of your device to locate the appropriate LED.

Power Supplies

The following steps are required when removing power supplies from a switch.

Note: Only a representative power supply module is shown in Figure 1. For the location of the power supply on your switch, refer to Rear Panel.

Removing a Power Supply

  1. Ground yourself with an ESD wrist strap.
  2. Power down the power supply to be removed by disconnecting the AC power cable.
  3. Push the power supply release lever and remove the power supply Figure 1.
Figure 1. Removing and Installing Power Supply

1 Release lever
2 Remove PSU

Installing a Power Supply

You must make space for installing the power supply by removing an existing one Removing a Power Supply.

  1. Remove the replacement power supply from its packaging.
  2. Slide the new power supply into the empty slot.
  3. Slide the new power supply into the switch until the power supply is fully seated and the release lever snaps into place Figure 1.
  4. Connect the power cord to the power supply.
  5. Verify the LEDs on the power supply.
    Note: The Power Supply status LED should be a steady green for normal operation.
  6. Verify the new power supply operation by issuing the show environment power command. 
    switch#show environment power

  7. The output of the command will list the power supplies in operation and should include the one you replaced.

Fan Modules

Note: Hot swap fans within 30 seconds to prevent the switch from overheating. Ensure that the module you are replacing matches those already installed in the switch.

Removing a Fan Module

The following steps are required when removing or replacing fans from a switch.

Note: Only a representative fan module is shown in Figure 2. For the location of the fan modules on your switch, refer to Rear Panel.
  1. Ground yourself with an ESD wrist strap.
  2. Push the fan module release lever and slide the fan module out of the switch.
Figure 2. Removing Fan Module

1 Release lever

Installing a Fan Module

You must make space for installing the fan module by removing an existing one.

  1. Remove the replacement fan from its packaging.
  2. Slide the new fan module into the switch until the module is fully seated and the release lever snaps into place (Figure 3).
    Figure 3. Inserting Fan Module

  3. Verify that the fan module is working normally.
    Note: The fan module status LED should be a steady green for normal operation.

Rear Panel

All switches covered by this guide use one of the rear panels shown below. Depending on the installed power supply module, the appearance could be different from those shown. Some of the PSUs have a velcro strap for cable management.

Note: All devices are designed to fit into a 19” rack. The appearance may be different than those shown based on PSU and fan modules used.
Note: Handle or bezel color indicates airflow direction.
Figure 1. Rear Panel with Two Fan Modules (1RU)
 
1 Power supply 1 4 Fan module 1 7 Power supply 2 status LED
2 Power supply 1 status LED 5 Fan module 2 8 Fan module 2 status LED
3 Management ports 6 Power supply 2 9 Fan module 1 status LED

 

Figure 2. Rear Panel with Three Fan Modules (1RU)

 
1 Power supply module 1 5 Fan module 1 status LED 9 Fan module 3 status LED
2 Power supply module 1 status LED 6 Fan module 2 release 10 Power supply module 2
3 Management ports 7 Fan module 2 status LED 11 Power supply module 2 status LED
4 Fan module 1 release 8 Fan module 3 release 12 Fan module bezel1

 

Figure 3. Rear Panel with Ground Attach Point (2RU)
 
1 Fan module 1 4 Fan module 4 7 Earth grounding pad
2 Fan module 2 5 Power supply module 1    
3 Fan module 3 6 Power supply module 2    

 

Figure 4. Rear Panel with Separation Between Fans 1 and 2 (no ground)
 
1 Fan Module 1 5 Fan Module 3 9 Release
2 Release 6 Fan Module 4 10 Power Supply Module 2
3 Status LED 7 Power Supply Module 1    
4 Fan Module 2 8 Status LED    

1. Bezel color indicates airflow direction.

Front Panel

This appendix displays the front panel of all switches covered by this guide.

Note:

All devices are designed to fit into a 19” rack. The appearance may be different than those shown based on PSU and fan modules used.

The port speed groups support breakout configurations which could be EOS version dependent.

Figure 1. DCS-7280PR3-24 and DCS-7280PR3K-24

1 System status LED 3 Power supply 1 status LED 5 Port numbers
2 Fan status LED 4 Power supply 2 status LED 6 Port-speed group

 

Figure 2. DCS-7280DR3-24 and DCS-7280DR3K-24

1 System status LED 3 Power supply 1 status LED 5 Port numbers
2 Fan status LED 4 Power supply 2 status LED 6 Port-speed group

 

Figure 3. DCS-7280CR3-32P4, DCS-7280CR3K-32P4 and DCS-7280CR3K-32P4A

1 System status LED 3 Power supply 1 status LED 5 Port numbers
2 Fan status LED 4 Power supply 2 status LED 6 Port-speed group

 

Figure 4. DCS-7280CR3-32D4, 7280CR3K-32D4 and DCS-7280CR3K-32D4A

1 System status LED 3 Power supply 1 status LED 5 Port numbers
2 Fan status LED 4 Power supply 2 status LED 6 Port-speed group

 

Figure 5. DCS-7280CR3-36S, DCS-7280CR3K-36S and DCS-7280CR3K-36A
1 Port numbers 5 Power supply 2 status LED 9 Port Speed Groups
2 System status LED 6 Ethernet Management port 10 Port Status LED
3 Fan status LED 7 USB port    
4 Power supply 1 status LED 8 Console port (serial)    

 

Figure 6. DCS-7280CR3-96 andDCS-7280CR3K-96
1 Port speed groups 4 Power supply 1 status LED 7 USB port
2 System status LED 5 Power supply 2 status LED 8 Ethernet Management port
3 Fan status LED 6 Console port (serial) 9 Port numbers
Figure 7. DCS-7280SR3-48YC8, DCS-7280SR3K-48YC8 and DCS-7280SR3K-48YC8A

1 Port numbers 3 Fan status LED 5 Power supply 2 status LED
2 System status LED 4 Power supply 1 status LED 6 Port status LED (port 25)
Figure 8. DCS-7280SR3-40YC6 and DCS-7280SR3E-40YC6
1 25G ports 4 Fan status LED 7 Port numbers
2 100G ports 5 Power supply 1 status LED    
3 System status LED 6 Power supply 2 status LED    

 

Figure 9. DCS-7280DR3A-54, DCS-7280DR3AK-54 and DCS-7280DR3AM-54
1 ToD Connector 5 Console port (serial) 9 Power supply 2 status LED
2 E-Sync clock connectors 6 System status LED 10 Line system ports (OSFP)
3 Ethernet management port 7 Fan status LED 11 Port numbers
4 USB port 8 Power supply 1 status LED    

 

Figure 10. DCS-7280DR3A-36, DCS-7280DR3AK-36 and DCS-7280DR3AM-36
1 Line system port (OSFP) 5 Power supply 1 status LED 9 Ethernet management port
2 Line system port (OSFP) 6 Power supply 2 status LED 10 ToD Connector
3 System status LED 7 Console port (serial) 11 E-Sync clock connectors
4 Fan status LED 8 USB port 12 Port numbers

 

 

 

Parts List

This appendix lists the installation parts contained in the switch accessory kit.

Each switch provides an accessory kit that contains parts that are required to install the switch. Four-post rack mount is recommended for all switches. Use the rack-mount parts included with your switch for mounting. Rails from different kit SKUs may look similar but could be incompatible for use with extension kits for longer switches. Depending on the PSU, C13/14, C19/20 or SAF-D type power cables are included in the accessory kit.
Note: Use only the components shipped with the switch or compatible replacement parts.
The following topics are covered in this section:

Accessory Kits

This section describes the components included with the accessory kits available with the switches. Not all kits are shipped with all switches. Use only the parts shipped with the switch or optional, compatible kits. Do not mix parts from incompatible kits such as KIT-7001/2 and KIT-7101/2.

KIT-7001

The kit supports rack depths of twenty two to thirty two inches for four-post rack mounting of 1RU switches. The kit includes two-post rack mount parts. If needed, only center mount is recommended for two-post mounting.

Assembly Part Number Description Quantity
ASY-00921 Two-post brackets 2
  IEC-320/C13-C14, 13 A, 250 V, 2 meter 2
  RJ45 Patch Panel Cable, 2 meter 1
  RJ45 to DB9 Adapter Cable, 2 meter 1
  Identity tag 1
ASY-01098-05 Rack ear with captive thumb screw 2
ASY-00905-0X Front rack rail with guide block 2
ASY-00916-0X Rear sliding rack rail with guide block 2
Figure 1. Two-Post Rack Mounting Brackets
1 Two-post rack mount parts
Figure 2. Four-Post Rack Mounting Parts

 
1 Rail-slide 3 Rack plugs (detail)
2 Rail-rod 4 Rail (assembled)

KIT-7001-4POST-L

This kit includes extended rails to support mounting some 1RU switches in thirty two to forty two inch rack depths. It is not compatible with deep chassis adapters.

Assembly Part Number Description Quantity
ASY-01098 Four-post brackets 2

KIT-7002

The kit supports rack depths of twenty two to thirty two inches for four-post rack mounting of 2RU switches. The kit includes two-post rack mount parts. If needed, only center mount is recommended for two-post mounting.

 
Assembly Part Number Description Quantity
ASY-00920 Two-post brackets 2
  IEC-320/C13-C14, 13 A, 250 V, 2 meter 2
  RJ45 Patch Panel Cable, 2 meter 1
  RJ45 to DB9 Adapter Cable, 2 meter 1
ASY-01098-05 Rack ear with captive thumb screw 2
ASY-00905-0X Front rack rail with guide block 2
ASY-00916-0X Rear sliding rack rail with guide block 2

KIT-7101

The kit supports rack depths of twenty two to thirty two inches for four-post rack mounting of 1RU switches. It is compatible with the deep chassis adapter required to support heavier and longer switches.
Note: KIT-7101 metals are marked with a double triangle symbol to distinguish them from the equivalent KIT-7001 parts.
Assembly Part Number Description Quantity
  IEC-320/C13-C14, 13 A, 250 V, 2 meter 2
  RJ45 Patch Panel Cable, 2 meter 1
  RJ45 to DB9 Adapter Cable, 2 meter 1
  Identity tag 1
ASY-05581 Rack ear with captive thumb screw 2
ASY-05578 Front rack rail with guide block 2
ASY-00916 Rear sliding rack rail with guide block 2

KIT-7101-D

The kit supports rack depths of twenty two to thirty two inches for four-post rack mounting of 1RU switches. It includes the deep chassis adapter required to support heavier and longer switches.

Assembly Part Number Description Quantity
  IEC-320/C13-C14, 13 A, 250 V, 2 meter 2
  RJ45 Patch Panel Cable, 2 meter 1
  RJ45 to DB9 Adapter Cable, 2 meter 1
  Identity tag 1
ASY-05581 Rack ear with captive thumb screw 2
ASY-05578 Front rack rail with guide block 2
ASY-00916 Rear sliding rack rail with guide block 2
ASY-05576 Deep chassis adapter 2
Figure 3. Four-Post Rack Mounting Brackets with Roller Extensions
1 Rack rail 4 Deep chassis adapter 7 Double triangle symbol
2 Rack rail 5 Rack ear with captive thumb screw    
3 Rack ear with captive thumb screw 6 Deep chassis adapter    

KIT-7102

The kit supports rack depths of twenty two to thirty two inches for four-post rack mounting of 1RU switches. It supports the deep chassis adapter required to support heavier and longer switches.

 
Assembly Part Number Description Quantity
  IEC-320/C19-C20, 16 A, 250 V, 2 meter 2
  RJ45 Patch Panel Cable, 2 meter 1
  RJ45 to DB9 Adapter Cable, 2 meter 1
  Identity tag 1
ASY-05581 Rack ear with captive thumb screw 2
ASY-05578 Front rack rail with guide block 2
ASY-00916 Rear sliding rack rail with guide block 2
  Deep chassis adapter 2

KIT-7102-D

The kit supports rack depths of twenty two to thirty two inches for four-post rack mounting of 1RU switches. It includes the deep chassis adapter required to support heavier and longer switches.

Assembly Part Number Description Quantity
  IEC-320/C19-C20, 16 A, 250 V, 2 meter 2
  RJ45 Patch Panel Cable, 2 meter 1
  RJ45 to DB9 Adapter Cable, 2 meter 1
  Identity tag 1
ASY-05581 Rack ear with captive thumb screw 2
ASY-05578 Front rack rail with guide block 2
ASY-00916 Rear sliding rack rail with guide block 2
ASY-05576 Deep chassis adapter 2

KIT-7201

The kit supports rack depths of twenty two to thirty two inches for four-post rack mounting of 2RU switches.

Assembly Part Number Description Quantity
  IEC-320/C13-C14, 13 A, 250 V, 2 meter 2
  RJ45 Patch Panel Cable, 2 meter 1
  RJ45 to DB9 Adapter Cable, 2 meter 1
  Identity tag 1
ASY-06132 Rack ear with captive thumb screw 2
ASY-03765 Front rack rail with guide block 2
ASY-03767 Rear sliding rack rail with guide block 2

KIT-7202

The kit supports rack depths of twenty two to thirty two inches for four-post rack mounting of 2RU switches.

Assembly Part Number Description Quantity
  IEC-320/C19-C20, 16 A, 250 V, 2 meter 2
  RJ45 Patch Panel Cable, 2 meter 1
  RJ45 to DB9 Adapter Cable, 2 meter 1
  Identity tag 1
ASY-06132 Rack ear with captive thumb screw 2
ASY-03765 Front rack rail with guide block 2
ASY-03767 Rear sliding rack rail with guide block 2

Cables

Lists the cables required for installation of the switches.
Note: Use only the power cables shipped with your switch.
Quantity Description
2 Power cables: IEC-320/C13-C14, 13 A, 250 V, 2 m
2 Power cables: IEC-320/C19-C20, 16 A, 250 V, 2 m
1 RJ-45 Patch Panel Cable
1 RJ-45 to DB9 Adapter Cable
Warning: All provided power cables are for use only with Arista products.

 


Ground Extender Kit (Optional)

Lists the cables required for installation of the device.
SKU Description
KIT-GND-EXT-1RU1 Ground extender kit for NEBS compliance
KIT-GND-EXT-2RU1 Ground extender kit for NEBS compliance
1. Compatible with specific devices.

Status Indicators

The following topics are covered in this section:

Front Indicators

Reviews the Switch and Port Indicators of the device.

Switch Indicators

Front panel LEDs are located on the right side of the chassis and display system, fan, and power supply status.

The front panel LEDs are labeled either as in Figure 1 or as in Figure 2. Check your device for the specific method utilized.

Figure 1. System Status Indicators


1 System status LED 3 Power supply 1 status LED
2 Fan status LED 4 Power supply 2 status LED
Figure 2. System Status Indicators

1 System status LED 3 Power supply 1 status LED
2 Fan status LED 4 Power supply 2 status LED
Table 1. Switch Indicators LED States (Front)
LED Name LED State Device Status
System Status LED Blinking Green System is powering up.
Green Normal operations. Due to power supply and fan redundancy, this LED will remain green if a single fan or power supply is missing or in a failed state.
Blue The locator function is active.
Amber Two or more fans (any combination of fan modules or PSU fans) are disconnected or malfunctioning. The switch will automatically execute a “graceful shutdown” shortly.
Fan Status LED Green All fan and power modules are operating normally.
Amber Single fan module is removed or malfunctioning. It is also amber when a PSU is completely removed or has a stuck fan rotor.
Red Two or more fans (any combination of fan modules or PSU fans) are disconnected or malfunctioning. The switch will automatically execute a “graceful shutdown” shortly.
PSU [1:2] Status LED Green PSU is functioning and fully operational. AC is present, Aux output is ON, and Main output is ON.
Off PSU has been removed or is not operating properly due to the AC cord being unplugged, its fan rotor being stuck, or an internal fault.

Port Indicators

Port LEDs, located in the vicinity of their corresponding ports, provide link and operational status.

The following figure displays the Port LED location on the DCS-7050QX-32S switch.

Figure 3. Port LEDs

1 Port 4 LEDs 3 Port 2 LEDs
2 Port 3 LEDs 4 Port 1 LEDs

Table 2 provides status conditions that correspond to port LED states. Port LED behavior for QSFP+ and SFP+ ports is consistent.

Table 2. Port LED States (Front)
LED State Status
Off Port link is down.
Green Port link is up.
Yellow Port is software disabled.
Flashing Yellow Port failed diagnostics.

Rear Status Indicators

Fan and power supply modules are accessed from the rear panel.

Each fan and power supply module contains an LED that reports the module status.

Fan Status LEDs are on the fan modules, as displayed in Figure 4.

Figure 4. Fan Status LED

1 Fan module status LED

Table 3 provides status conditions that correspond to fan status LED states.

Table 3. Fan Status LED States (Rear)
LED State Status
Off The fan module is not detected. If it is inserted, it may not be seated properly.
Green The fan is operating normally. This LED state is exclusive to its fan module, and independent of the states of its neighboring fans and power supplies.
Red The fan has failed.

The AC Power Supply Status LEDs are on the power supply modules, as displayed in Figure 5.

Figure 5. AC Power Supply Status LED

1 Power supply status LED

Table 4 provides status conditions that correspond to the AC power supply status LED states.

Table 4. AC Power Supply Status LED States (Rear)
Power Supply State PWR-500AC-F PWR-500AC-R PWR-745AC-F PWR-745AC-R PWR-747AC-F PWR-747AC-R
Input power present Normal operation Green Green Green
Input power present Power Supply fault Yellow Yellow Yellow
No Input power Supply installed in chassis Off Off Off
Input power present Supply not installed in chassis Green Green Green

The DC Power Supply Status LEDs are on the power supply modules, as displayed in Figure 6.

Figure 6. DC Power Supply Status LED

Table 5 provides status conditions that correspond to the DC power supply status LED states.

Table 5. DC Power Supply Status LED States (Rear)
Power Supply State PWR-500DC-F PWR-500DC-R PWR-1900-DC PWR-2411-DC
Input power present Normal operation Green Green Green
Input power present Power Supply fault Blinking Yellow Blinking Yellow Blinking Yellow
No Input power Supply installed in chassis Off Off Off
Input power present Supply not installed in chassis Blinking Yellow Blinking Yellow Blinking Yellow
Note: You can narrow down the error condition by logging in to the switch to view the specific device state. Refer to the Arista User Manual’s Switch Environment Control chapter, under the topic Viewing Environment Status, for further information on the show environment commands.

Configuring the Switch

Arista switches ship from the factory in Zero Touch Provisioning (ZTP) mode. ZTP configures the switch without user intervention by downloading a startup configuration file or a boot script from a location specified by a DHCP server.

To manually configure a switch, ZTP is bypassed. The initial configuration provides one username (admin) accessible only through the console port because it has no password.

When bypassing ZTP, initial switch access requires logging in as admin, with no password, through the console port. Then you can configure an admin password and other password protected usernames.

This manual configuration procedure cancels ZTP mode, logs into the switch, assigns a password to admin, assigns an IP address to the management port, and defines a default route to a network gateway.

As the switch boots without a startup-config file, it displays the following through the console: 
The device is in Zero Touch Provisioning mode and is attempting to
download the startup-config from a remote system. The device will not
be fully functional until either a valid startup-config is downloaded
from a remote system or Zero Touch Provisioning is cancelled. To cancel
Zero Touch Provisioning, login as admin and type 'zerotouch cancel'
at the CLI.
localhost login:
  1. Provide power to the switch (Cabling the Switch).
  2. Connect the console port to a PC (Connecting Serial and Management Cables).
  3. Log into the switch by typing admin at the login prompt. 
    localhost login:admin
  4. Cancel ZTP mode by typing zerotouch cancel. IMPORTANT: This step initiates a switch reboot. 
    localhost>zerotouch cancel
  5. After the switch boots, log into the switch again by typing admin at the login prompt. 
    Arista EOS
localhost login:admin
Last login: Fri Mar 15 13:17:13 on console
  6. Enter global configuration mode. 
    localhost>enable
localhost#config
  7. Assign a password to the admin username with the username secret command. 
    localhost(config)#username admin secret pxq123
  8. Configure a default route to the network gateway. 
    localhost(config)#ip route 0.0.0.0/0 192.0.2.1
  9. Assign an IP address (192.0.2.8/24 in this example) to an Ethernet management port. 
    localhost(config)#interface management 1
localhost(config-if-Ma1/1)#ip address 192.0.2.8/24
  10. Save the configuration by typing write memory or copy running-config startup-config. 
    localhost#copy running-config startup-config

  11. When the management port IP address is configured, use this command to access the switch from a host, using the address configured in step 9.

    ssh admin@192.0.2.8

Refer to the Arista Networks User Manual for complete switch configuration information.

Cabling the Switch

The following topics are covered in this section:
Note: Arista fixed switches take approximately 5 to 10 minutes to boot completely.

Grounding the Switch

After mounting the switch into the rack, connect the switch to the data center ground.

Figure 1 displays the location of the grounding assembly on the chassis for DCS-7280CR3-32P4 and similar switches that use the KIT-GND-EXT-1RU grounding kit. For the 2RU switches, the grounding location is at the rear panel of the switches or on the side using the KIT-GND-EXT-2RU grounding kit.

 

Important: Grounding wires and grounding lugs (M4 x 0.7) are not supplied. Wire size should meet local and national installation requirements. Commercially available 6 AWG wire is recommended for installations in the US.

 

À la terre et de mise à la terre fils cosses (M4 x 0.7) ne sont pas fournis. Calibre des fils doit satisfaire des exigences de l’installation locale et nationale. Disponible dans le commerce 6 fils AWG est recommandé pour les installations aux États-Unis.

Figure 1. Earth Grounding Adapter (DCS-7280CR3-32P4 shown)

Grounding Adapter Assembly (1RU)

The following steps assemble and attach a grounding assembly to the chassis before mounting it into the rack.

The following switches support external chassis grounding. Identify the location for attaching the adapter or the lug. As shown in the following example, the attachment point is on the bottom of the chassis for the switches that support the KIT-GND-EXT-1RU grounding kit.

 

Table 1. Grounding Kit Adapter Support
Switch Grounding Kit Adapter
DCS-7280R3 Series switches
DCS-7280PR3-24 KIT-GND-EXT-1RU
DCS-7280PR3K-24 KIT-GND-EXT-1RU
DCS-7280DR3-24 KIT-GND-EXT-1RU
DCS-7280DR3K-24 KIT-GND-EXT-1RU
DCS-7280CR3-32P4 KIT-GND-EXT-1RU
DCS-7280CR3K-32P4 KIT-GND-EXT-1RU
DCS-7280CR3K-32P4A KIT-GND-EXT-1RU
DCS-7280CR3-32D4 KIT-GND-EXT-1RU
DCS-7280CR3K-32D4 KIT-GND-EXT-1RU
DCS-7280CR3K-32D4A KIT-GND-EXT-1RU
DCS-7280CR3-36S KIT-GND-EXT-1RU
DCS-7280CR3K-36S KIT-GND-EXT-1RU
DCS-7280CR3K-36A KIT-GND-EXT-1RU
DCS-7280SR3-48YC8 KIT-GND-EXT-1RU
DCS-7280SR3K-48YC8 KIT-GND-EXT-1RU
DCS-7280SR3K-48YC8A KIT-GND-EXT-1RU
DCS-7280SR3-40YC6 KIT-GND-EXT-1RU
DCS-7280SR3E-40YC6 KIT-GND-EXT-1RU
DCS-7280TR3-40C6 KIT-GND-EXT-1RU
DCS-7280R3A Series switches
DCS-7280CR3A-24D12 KIT-GND-EXT-1RU
DCS-7280CR3AM-24D12 KIT-GND-EXT-1RU
DCS-7280CR3AK-24D12 KIT-GND-EXT-1RU
Earth Grounding Adapter Assembly for DCS-7280CR3-32P4 shows the exploded and assembled views of using the KIT-GND-EXT-1RU grounding kit.
Figure 2. Earth Grounding Adapter Assembly for DCS-7280CR3-32P4

  1. Identify all the components to be assembled:
    Note: The chassis is shown upside down in the figure above.
    • 1x Grounding adapter
      • 1x Grounding bracket
        • 2x Flat-head screws (Phillips,M4 x 5.00 long, stainless steel)
        • 2x Hex nuts (#10-32, Serrated Flange, stainless steel)
        • 1x Grounding lug (Copper, 2-hole, 6 AWG, straight barrel)
  2. Insert the grounding adapter through the holes in the grounding bracket.
  3. Insert the ground lug on to the grounding adapter studs and fasten using the hex nuts to form the grounding assembly.
  4. With the chassis on its top on a flat surface, attach the grounding assembly to the chassis using the flat head screws.
  5. Turn the chassis over before mounting it into a rack and connecting cables.

Grounding Adapter Assembly (2RU)

The following steps attach a grounding assembly KIT-GND-EXT-2RU to the side of the supported 2RU chassis before mounting it into the rack.

Identify the location for attaching the adapter or the lug. As shown in the following example, the attachment point is on the side of the chassis for the switches that support the KIT-GND-EXT-2RU grounding kit. The grounding location is on the back for those supporting direct attach.

 

Table 2. Grounding Kit Adapter Support (2RU)
Switch Grounding Kit Adapter
DCS-7280R3 Series switches
DCS-7280CR3-96 Attach directly - right angle lug recommended
DCS-7280CR3K-96 Attach directly - right angle lug recommended
DCS-7280R3A Series switches
DCS-7280DR3A-54 KIT-GND-EXT-2RU
DCS-7280DR3AM-54 KIT-GND-EXT-2RU
DCS-7280DR3AK-54 KIT-GND-EXT-2RU
DCS-7280DR3A-36 Attach directly - right angle lug recommended
DCS-7280DR3AM-36 Attach directly - right angle lug recommended
DCS-7280DR3AK-36 Attach directly - right angle lug recommended
DCS-7280CR3A-48D6 Attach directly - right angle lug recommended
DCS-7280CR3AM-48D6 Attach directly - right angle lug recommended
DCS-7280CR3AK-48D6 Attach directly - right angle lug recommended
DCS-7280CR3A-72 Attach directly - right angle lug recommended
DCS-7280CR3AM-72 Attach directly - right angle lug recommended
DCS-7280CR3AK-72 Attach directly - right angle lug recommended
The following figure shows the exploded and assembled views of using the KIT-GND-EXT-2RU grounding kit.
Figure 3. Earth Grounding Adapter for side attach
  1. Identify all the components to be assembled:
    • 1x Grounding adapter
      • 1x Grounding bracket
        • 2x Flat-head screws (Phillips,M4 x 5.00 long, stainless steel)
        • 2x Hex nuts (#10-32, Serrated Flange, stainless steel)
        • 1x Grounding lug (Copper, 2-hole, 6 AWG, straight barrel)
  2. Insert the grounding adapter through the holes in the grounding bracket.
  3. Insert the ground lug on to the grounding adapter studs and fasten using the hex nuts to form the grounding assembly.
  4. With the chassis on a flat surface, attach the grounding assembly to the chassis using the flat head screws.

Connecting Power Cables

You must use an approved power cord compliant with local and national electrical codes or order one from Arista for use with the switch. Some power cords are shipped with each switch as part of the accessory kit.

Important: Installation of this equipment must comply with local and national electrical codes. If necessary, consult with the appropriate regulatory agencies and inspection authorities to ensure compliance.

 

Installation de cet équipement doit être conformes aux codes électriques locaux et nationaux. Si nécessaire, consulter les organismes de réglementation appropriés et des autorités de contrôle pour assurer la conformité.

The switch operates with two installed power supplies. At least one power supply must connect to a power source. Two circuits provide redundancy protection. Rear Panel displays the location of the power supplies on the rear panel of the switch.

Important: Read all installation instructions before connecting the system to the power source.

 

Lire toutes les instructions d’installation avant de brancher le système à la source d’alimentation.
  • Non-Redundant Configuration: Connect power to either of the two power supplies.
  • Redundant Power Supply Configuration: Connect power to both power supplies.
  • Power down the Switch: Remove all power cords and wires from the power supplies.
    Important: This equipment must be grounded. Never defeat the ground conductor.

     

    Cet équipement doit être mis à la terre. Ne jamais modifier le conducteur de terre.

    Important: This unit requires overcurrent protection.

     

    Cet appareil requiert une protection contre les surintensités.

AC Power Supplies

The following AC power supplies are supported.

 
PWR-511-AC PWR-1511-AC PWR-3001-AC
PWR-1011-AC PWR-2411-AC  

Figure 4 displays an AC power supply, including the power socket on the left side of the module. The AC power supply connects to a circuit that provides the required power, as specified by Table 4.

Note: Several PSUs support both forward and reverse airflow directions.
Figure 4. AC Power Supply Example

The accessory kit provides power cables for some switches.

DC Power Supplies

The following DC power supplies are supported.

Note: Several PSUs support both forward and reverse airflow directions.
 
PWR-500-DC PWR-1511-DC PWR-3001-DC
PWR-511-DC PWR-1900-DC  
PWR-1011-DC PWR-2411-DC  

The following image displays examples of DC power supplies.

Figure 5. DC Power Supply Examples

Important: A disconnect device must be provided as part of the installation .

 

Un dispositif de sectionnement doit être fourni dans le cadre de l'installation.

Important: Ensure power is removed from DC circuits before performing any installation actions. Locate the disconnect device, circuit breakers or fuses on DC power lines servicing the circuits. Turn off the power line circuits or remove the fuses.

 

Pouvoir assurer qu'il est retiré de circuits DC avant d'effectuer des actions d'installation . Localiser les disjoncteurs ou des fusibles sur les lignes de courant continu desservant les circuits. Coupez les circuits de lignes d'alimentation ou retirer les fusibles.

Important: Wire size must comply with local and national requirements and electrical codes. Use only copper wire.

 

Le calibre du fil doit être conforme aux exigences locales et nationales et les codes électriques. Utiliser du fil de cuivre.

Important: Apply ground connection to the switch first during installation and remove last when removing power.

 

Appliquer connexion à la terre à l'interrupteur premier lors de l'installation et de supprimer la dernière alimentation lors du débranchement.

Wire and Lug Preparation

Before performing any installation actions, ensure power is removed from DC circuits by turning off the power line servicing the circuits. Prepare the stranded wiring before you begin a DC power installation.

Note: Stranded copper wiring is required and should meet local and national installation requirements. Wires and grounding lugs are not supplied.
  1. Attach an ESD grounding strap.
  2. Prepare the stranded copper wiring for the power supply to be used. Table 4 provides wiring, lug, and tightening torque information for the power supplies covered in this guide.
    Table 3. Wiring, Lug, and Tightening Torques for DC PSUs
    PSU Wire Size(1) Lug Type(2) Tightening Torque
    (AWG) (mm2) N•m in.•lbs.
    PWR-500-DC 14 or larger 2.0 or larger ring or spade/fork 1.0 9
    PWR-511-DC 12 - 14 4.0 - 2.5   1.0 9
    PWR-1900-DC 4 - 6 21.2 - 13.3   2.7 24
    PWR-1011-DC 6 - 8 16.0 - 10.0   2.7 24
    PWR-1511-DC 4 - 6 25.0 - 16.0   2.7 24
    PWR-2411-DC 2 - 4 35.0 - 25.0   2.7 24
    PWR-3001-DC 1 - 2 50 - 35.0   4.0 35
  1. Unless otherwise noted, wire size applies to -48V, Battery return, and Protective earth wires.
  2. Unless otherwise noted, twin #10 studs spaced for dual-hole lug with 5/8" hole spacing.
  3. Strip the wires to the appropriate length for the lugs to be used.
  4. Use agency-approved compression (pressure) lugs for wiring terminations.
  5. Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
  6. Crimp the lugs with the proper tool, and ensure that the tubing extends over the barrel of the lugs and the insulation on the wires (Lug Preparation).
  7. Shrink the tubing with a heat gun.
Figure 6. Lug Preparation
 
1 Insulated wire 3 Lug B 1/2”
2 Heat-shrink tubing A 1/4” C 5/8”
Note: Dimension B is the width of the lug (not visible on the right angle lug).

Connecting a DC Power Supply to Power Source

Figure 7 displays an example of connecting a PSU. To connect a DC power supply to a power source, perform the following:

  1. Prepare the stranded wiring (Wire and Lug Preparation).
  2. Attach the appropriate lugs to the source DC wires.
  3. Connect the DC-input wires to the appropriate terminals using the specified torque (Table 4) in the following order.
    Note: Remove terminal covers as needed.
    1. Ground wire to the Protective Earth (PE ) terminal.
    2. Negative source DC cable to the negative (- / -48V) terminal.
    3. Positive (+) source DC cable to the positive (+ / Rtn) terminal.
  4. Replace the terminal covers as required.
    Note: The ground terminal is on the opposite side from the two terminals shown, and is not visible in the following illustration.
    Figure 7. DC PSU Connection Example

Connecting Serial and Management Cables

The accessory kit includes the following cables:
  • RJ-45 to DB-9 serial adapter cable.
  • RJ-45 Ethernet cable.

Table 4 lists the pin connections of the RJ-45 to DB-9 adapter cable.

Table 4. RJ-45 to DB-9 Connections

RJ-45

DB-9

  

RJ-45

DB-9
RTS 1 8 CTS   GND 5 5 GND
DTR 2 6 DSR   RXD 6 3 TXD
TXD 3 2 RXD   DSR 7 4 DTR
GND 4 5 GND   CTS 8 7 RTS
Note: RJ-45 to DB-9 connections: For models with a console management port on the rear panel, RJ-45 pin 1 (RTS) is connected to RJ-45 pin 8 (CTS); RJ-45 pin 2 (DTR) and RJ-45 pin 7 (DSR) are not electrically connected to any signal.

For most models, the front panel contains the console, management, and USB ports. The front panel ports display the ports on the front panel of the DCS-7050QX-32S switch. The rear panel ports display the ports on rear panel of the DCS-7280SR-48C6 switch. The front panel and rear panel display all switches covered by this guide.

Figure 8. Front Panel Ports

 
1 USB port 3 Console serial port
2 Ethernet management port    
Figure 9. Rear Panel Ports

 
1 System status LED 3 Activity status LED 5 USB port
2 Ethernet management port 4 Console serial port 6 Link status LED
Connect the front or rear panel ports as follows:
  • Console (Serial) Port: Connect to a PC with the RJ-45 to DB-9 serial adapter cable. The switch uses the following default settings:
    • 9600 baud
    • No flow control
    • 1 stop bit
    • No parity bits
    • 8 data bits
  • Ethernet Management Port: Connect to 10/100/1000 management network with RJ-45 Ethernet cable.
  • USB Port: The USB port may be used for software or configuration updates.
    CAUTION: Excessive bending can damage interface cables, especially optical cables.

    Flexion excessive peut endommager les câbles d’interface, notamment des câbles optiques.

Rack Mounting the Switch

Rack Mounting the Switch (1RU)

The following topics are covered in this section:
Note: Four-post rack mount is recommended for all switches. Use the rack-mount parts included with your switch for mounting. Rails from different kit SKUs may look similar but could be incompatible leading to the inability to properly mount or remove a switch from the rack.

The following sections detail rack mounting in two-post and four-post racks for 1 RU switches.

Important: The rack mounting procedure is identical for all switches covered by this guide. Illustrations in this chapter depict the mounting of a DCS-7050QX-32S switch.

Les procédure de montage du bâti est identique pour tous les commutateurs visés par ce guide. Illustrations dans ce chapitre montrent le montage d’un interrupteur de DCS-7050QX-32S.

After completing the instructions for your rack type, proceed to Cabling the Switch.

Two-Post Rack Mount (1RU)

To mount the switch onto a two-post rack, assemble the mounting brackets to the chassis, then attach the brackets to the rack posts. Two-post accessory kits include the following two-post mounting parts.

2 - Three-hole Mounting Brackets

Each chassis side has attachment pins that align with bracket holes. Pin orientation is symmetric and equidistant, supporting bracket placements where the flange is flush with the front switch panel, flush with the rear panel, or not flush with either panel. Each bracket hole includes a key-opening for placing the bracket flush with the chassis and then locking it into place.

Important: Attachment pins must engage all three upper bracket holes.

Les goupilles de fixation doivent être bloquées tous les trois trous de la bride supérieure.

Attaching Mounting Brackets to the Chassis (Two-Post)

The following figure displays the front bracket alignment for attaching the switch into a two-post rack.

Figure 1. Bracket Mount Examples for Two-Post Rack Mount

 

Note: Deep and heavy devices could droop and cause damage to the equipment rack if front or rear mounted. Arista recommends only center mounting for switches covered in this guide when two-post mounting is required, and the switch accessory kit includes two-post mounting ears. Four-post mounting ears are different from the two-post mounting ears and should not be used for two-post mounting.

The following figure displays examples of improper bracket mounts for two-post rack mount.

Figure 2. Improper Bracket Mount Examples for Two-Post Rack Mount

The following procedure attaches the two-post rack mount brackets to the chassis.

  1. Align the mounting brackets with the attachment pins to obtain the desired mounting position.
  2. Place the bracket flush on the chassis with attachment pins protruding through key-openings.
  3. Slide the bracket toward the front flange until the bracket clip locks with an audible click.

The following figures show the correct bracket attachment for a center mount.

Figure 3. Attaching the Mounting Brackets to the Switch Chassis

 

To remove the mounting bracket from the chassis, lift the front edge of the mounting bracket clip with a flathead screwdriver and slide the bracket away from the front flange (opposite from the installation direction).

Inserting the Switch into the Rack (Two-Post)

This procedure attaches the switch to the rack.

  1. Lift the chassis into the rack. Position the flanges against the rack posts.
  2. Select mounting screws that fit your equipment rack.
  3. Attach the bracket flanges to the rack posts.
    Figure 4. Inserting the Switch into the Rack

    After completing the two-post rack mount, proceed to Cabling the Switch.

Four-Post Rack Mount (1RU)

The switch is mounted onto a four-post rack by assembling two rails onto the rear posts, sliding the switch onto the rails, then securing the switch to the front posts.

The installation kit provides the following four-post mounting parts:
  • 2 six-hole mounting brackets
  • 2 rail-rods
  • 2 rail-slides

The rail-rods and rail-slides assemble into two identical slide-rails.

Note: For longer chassis, there are two additional pieces to help the switch engage with the rails earlier.

Each chassis side has attachment pins that align with bracket holes. Pin orientation is symmetric and equidistant, supporting bracket placements where the flange is flush with the front switch panel, flush with the rear panel, or not flush with either panel. Each bracket hole includes a key-opening for placing the bracket flush with the chassis and then locking it into place.

Important: Attachment pins must engage at least five of the six bracket holes.

Goupilles de fixation doivent être lock au moins cinq des trous du six support.

The following figure displays proper bracket mount configuration examples for four-post mounting.

Figure 5. Bracket Mount Examples for Four-Post Rack Mount

The following figure displays an improper bracket mount configuration example.

Figure 6. Improper Bracket Mount Example for Four-Post Rack Mount

Attaching Mounting Brackets to the Chassis (Four-Post)

The following figure displays the front bracket alignment for mounting the switch into a four-post rack.
Figure 7. Attaching the Mounting Brackets to the Switch Chassis (KIT-7101 shown)
Figure 8. Attaching the Mounting Brackets to the Switch Chassis (with Deep Chassis Adapters)

This procedure attaches mounting brackets to the switch chassis as depicted by the preceding figure(s).

  1. Align the mounting brackets with the attachment pins to obtain the desired mounting position.
  2. Place the bracket flush on the chassis with attachment pins protruding through key-openings.
  3. Slide the bracket toward the front flange until the bracket clip locks with an audible click.
  4. Attach the deep chassis adapters as needed.

To remove the mounting bracket from the chassis, lift the front edge of the mounting bracket clip with a flathead screwdriver and slide the bracket away from the front flange (opposite from the installation direction).

The rest of the rack mounting steps are the same for both KIT-7001 and KIT-7101.

Assembling the Rails onto the Equipment Rack

Rail-rods and rail-slides assemble into two identical rails. Each rail connects a front post to a rear post. When the rails are installed, the switch slides on the rails into the rack. Each bracket includes a screw that attaches the switch to the rail.

Each end of an assembled rail contains two rack plugs (Figure 9). The rails are installed into a rack by inserting the plugs into rack slots. When installing rails into posts with threaded or rounded holes, remove all plugs located on both sides of the assembled rails, then install the rails with bolts that fit the rack.

Figure 9. Attaching the Four-Post Mounting Brackets to the Switch Chassis

1 Step 1 4 Bracket clip (attached)
2 Step 2 5 Bracket clip (aligned)
3 Step 3    

This procedure attaches the rails to a four post rack:

  1. Slide a rail-rod into a rail-slide (Figure 10) until the rail clip makes an audible click.

    The rail clip prevents the extension of the rail beyond the maximum supported distance between the front and rear rack posts.

    Figure 10. Assembling the Rails

    1 Rail-slide 4 Rail (assembled)
    2 Rail-rod    
    3 Rack plugs    
  2. Attach rail to the right rear rack post by inserting rod-end rack plugs into post slots (Figure 11). The slide assembly must be inside the right posts, relative to the left rack posts.

    If the rack plugs were previously removed, use bolts to attach the rail to the rack.

  3. Attach the slide end of the rail to the front post by extending the rail end past the post, then contracting the rail while guiding the rack plugs into the post.
  4. Repeat Step 1 through Step 3 for the left posts. Ensure the rails are on the same horizontal level.
    Figure 11. Attaching the Rails

    1 Inset A
    2 Inset B

Attaching the Switch to the Rack

After the rails are installed, the switch slides on the rails into the rack. Each bracket includes a thumb screw that attaches the switch to the rail.

  1. Lift the switch into the rack and insert the mounting brackets into the slide rails.
    Figure 12. Inserting the Switch onto the Rails
  2. Slide the switch on the rails, toward the rear posts, until the mounting bracket flanges are flush with the rail flanges attached to the rack posts.
  3. Attach the bracket flanges to the rack post using the quick-release thumb screws supplied with the brackets Figure 13. Hand-tighten the thumb screws or use a Phillips #2 screwdriver.
    Note: Do not exceed a maximum torque of 20in-lb or use powered impact drivers to secure the thumb screws.
    Figure 13. Attaching the Switch to the Rack Posts

After completing the four-post rack mount, proceed to Cabling the Switch.

Rack Mounting the Switch (2RU)

The following topics are covered in this section:

in two-post and four-post racks for 2RU switches.

Important: The rack mounting procedure is identical for all switches covered by this guide. Illustrations in this chapter depict the mounting of a DCS-7050SX-128 switch.

 

Les procédure de montage du bâti est identique pour tous les commutateurs visés par ce guide. Illustrations dans ce chapitre montrent le montage d'un interrupteur de DCS-7050SX-128.

 

After completing the instructions for your rack type, proceed to Cabling the Switch.

Two-Post Rack Mount (2RU)

The 2RU switches covered in this guide do not support two-post rack mounting. The accessory kit contains only the four-post RMK components. Contact your local Arista Networks representative for further information if you require two-post rack mounting.

Four-Post Rack Mount (2RU)

The switch is mounted onto a four-post rack by assembling two rails onto the rear posts, sliding the switch onto the rails, then securing the switch to the front posts.

The installation kit provides two bracket-rail assemblies. The following four-post mounting parts are extracted from each assembly:
  • Six-hole mounting bracket
  • Rail

Each chassis side has attachment pins that align with bracket holes; the number of pins (six or seven) varies by switch model. Pin orientation is symmetric and equidistant, supporting bracket placement where the flange is either flush with the front and rear panels, or not flush with the panels. Each bracket hole includes a key-opening for placing the bracket flush with the chassis and then locking it into place.

 

Important: Attachment pins must engage all six bracket holes.

 

Goupilles de fixation doivent s’engager tous les trous de support six.

 

Extracting the Brackets and the Rails

The following figure displays a bracket-rail assembly and the component pieces (bracket and rail) that are extracted from the assembly kit. Each assembly must be separated into its component pieces before mounting the switch into a four-post rack. The two assemblies supplied with the switch are identical.

Figure 14. Accessory Kit Components
1 Rail bracket (front) 4 Locking clip 7 Switch mounting ear
2 Rail bracket (rear) 5 Rail mounting ear    
3 Switch bracket (for attaching to switch) 6 Thumb screw    

This procedure separates a bracket-rail assembly into its component pieces.

  1. Grip the rail with one hand.
  2. Pull the bracket flange away from the rail flange with your other hand until the bracket clip catches on the rail.

    If the bracket flange resists initially, verify the thumb screw on the bracket flange is not attached to the rail flange.

  3. While pressing the locking clip on the bracket, resume pulling the bracket from the rail until the separation is complete.
  4. Repeat the procedure for the other assembly.

Attaching Mounting Brackets to the Chassis

The following figure displays the switch bracket alignment for mounting the switch into a four-post rack.
Figure 15. Front Bracket Alignment
1 Switch bracket 3 Matching attachment hole
2 Attach point    

This procedure attaches mounting brackets to the switch chassis as depicted by the following figure.

  1. Align the mounting brackets with the attachment pins.
  2. Place the bracket flush on the chassis with attachment pins protruding through key-openings.
  3. Slide the bracket toward the front flange until the rail locks with an audible click.
    Figure 16. Attaching the Mounting Brackets to the Switch Chassis
     
    1 Aligned rail
    2 Seated rail

    To remove the mounting bracket from the chassis, lift the front edge of the mounting bracket clip with a flathead screwdriver and slide the bracket away from the front flange (opposite from the installation direction).

Expanding the Rails

The rail is a two-piece mechanism. The rail length is adjusted by sliding the rail-rod inside the rail-slide. The rail clip prevent extension of the rail beyond the maximum supported distance between front and rear rack posts. When the rail is contracted, the rail clip is closest to the slide end.

The rail is initially contracted and must be expanded to attach onto the rack. This procedure expands the rails from their contracted state:

  1. Grip the slide end with your left hand and the rod end with your right hand.
  2. Pull the ends apart until the rail-clip makes an audible click.

Assembling the Rails onto the Equipment Rack

A rail connects a front post to a rear post. Each end has two rack plugs. Rails are installed into a rack by inserting the plugs into rack slots. To install rails into posts with threaded or rounded holes, remove all plugs on both sides of the rails, then install the rails with bolts that fit the rack. This procedure attaches the rails to a four-post rack:
  1. Attach rail to the right rear rack post by inserting rod-end rack plugs into post slots. The slide assembly must be inside the right posts, relative to the left rack posts (Figure 17).

    If the rack plugs were previously removed, use bolts to attach the rail to the rack.

  2. Attach the slide end of the rail to the front post by extending the rail end past the post, then contracting the rail while guiding the rack plugs into the post.
  3. Repeat Step 1 through Step 2 for the left posts. Ensure the rails are on the same horizontal level.
    Figure 17. Attaching the Rails
    1 Front of right rail 3 Right rack post (rear)
    2 Right rack post (front) 4 Rear of right rail

Attaching the Switch to the Rack

After the rails are installed, the switch slides on the rails into the rack. Each bracket includes a thumb screw that attaches the switch to the rail.
Note: Illustrations shown could be different based on your accessory kit.
  1. Lift the switch into the rack and insert the mounting brackets into the slide rails.
  2. Slide the switch on the rails, toward the rear posts, until the mounting bracket flanges are flush with the rail flanges attached to the rack posts.
    Figure 18. Inserting the Switch onto the Rails
  3. Attach the bracket flanges to the rack post using the quick-release thumb screws supplied with the brackets.Hand-tighten the thumb screws or use a Phillips #2 screwdriver.
    Note: Do not exceed a maximum torque of 20in-lb or use powered impact drivers to secure the thumb screws.
    Figure 19. Attaching the Switch to the Rack Posts

    After completing the four-post rack mount, proceed to Cabling the Switch.