Port Mirroring with Greenspan
The Mirroring features allows the mirroring of source port packets in Rx, Tx and both directions to a local destination port. Mirroring with Greenspan feature allows mirroring of source packets in Rx direction on to GRE tunnel.
Configuring Mirroring with Greenspan and Port
- These commands configure a mirroring session with destination for GRE tunnel interface and regular port.
Syntax
// Source port
switch(config)#monitor session <name> source <interface> [ rx | tx | both ] [ ip access-group <access-list-name>
// GREENSPAN destination
switch(config)#monitor session <name> destination tunnel mode gre source <ipAddress> destination <ipAddress> ttl <ttlValue> dscp <dscpValue>
// Port destination
switch(config)#monitor session <name> destination <interface>
Example
switch(config)#monitor session r1 source Ethernet2 rx ip access-group a3
switch(config)#monitor session r1 destination tunnel mode gre source 75.75.75.75 destination 100.1.0.2
Displaying Mirroring with Greenspan and Port Information
These two commands display the monitor and platform related mirroring information.
- show monitor session
- show platform sfe mirroring
Example
- The show monitor session command displays the session information.
switch#show monitor session
Session r1
------------------------
Programmed in HW: Yes
Source Ports:
Rx Only: Et2(IPv4 ACL: a3)
Destination Ports:
statussource destTTL DSCP protoVRF fwd-drop
Gre1 :active 75.75.75.75 100.1.0.2 128 0 0x88be default no
next hop interfaces: Et5
- The show platform sfe mirroring command displays the platform specific SFE mirroring information.
switch#show platform sfe mirroring
Session: r1, mirrorGroup: 3, globalId: 0
srcIntf: Ethernet2, direction: Rx
tgtIntf: Gre1
encapType: Gre
Sfe module: Mir_r1_Rx_et2
Sfe srcIntf: Ethernet2, direction: Rx, gate: 0
Sfe tgtIntf: Ethernet5, gate: 1
Copy Success: 47523752, Fail: 0
forward Success: 53109025, Fail: 0