- Written by Rafat Mahmud
- Posted on March 6, 2020
- Updated on March 6, 2020
- 6450 Views
MPLS LDP traceroute utility has now been extended to support multipath traceroute. This allows network
- Written by Adrian Fettes
- Posted on July 2, 2024
- Updated on July 12, 2024
- 427 Views
MPLS speculative parsing is the parsing of the headers following the MPLS header. Because there is no ethertype following the MPLS header, it can be difficult to discern the following header type(s). Some headers can be misparsed, so certain configurations are provided to allow customization of the parsing behaviour.
- Written by Praveen Kumar Yadav
- Posted on October 20, 2022
- Updated on June 13, 2024
- 5375 Views
In the 7280R3/7500R3/7800R3 platform, EXP rewrite for IP-MPLS routed flows is derived from the DSCP of the packet. Using Qos Policy map , DSCP can be set as needed. But in this process, the egress IP TOS was also changed, which may cause issues later at customer edge.
- Written by Aaron Bamberger
- Posted on April 23, 2020
- Updated on February 13, 2024
- 8960 Views
E-Tree is an L2 EVPN service (defined in RFC8317) in which each attachment circuit (AC) is assigned the role of Root or Leaf. Once roles are assigned, the following forwarding rules are enforced:
- Written by Jeffrey Nelson
- Posted on March 5, 2020
- Updated on July 31, 2023
- 9947 Views
This feature adds control plane support for inter subnet forwarding between EVPN and IPVPN networks. It also
- Written by Jeff Wen
- Posted on January 21, 2019
- Updated on November 30, 2023
- 8830 Views
In the traditional data center design, inter-subnet forwarding is provided by a centralized router, where traffic traverses across the network to a centralized routing node and back again to its final destination. In a large multi-tenant data center environment this operational model can lead to inefficient use of bandwidth and sub-optimal forwarding.
- Written by Jeffrey Nelson
- Posted on October 28, 2020
- Updated on August 11, 2023
- 18919 Views
This feature adds control plane support for inter subnet forwarding between EVPN networks. This support is achieved
- Written by Christoph Schwarz
- Posted on August 23, 2022
- Updated on October 21, 2022
- 7531 Views
Flexible cross-connect service is an extension of EVPN MPLS Virtual Private Wire Service (VPWS) (RFC 8214). It allows for multiplexing multiple attachment circuits across different Ethernet Segments and physical interfaces into a single EVPN VPWS service tunnel while still providing single-active and all-active multi-homing.
- Written by Arpit Bansal
- Posted on January 6, 2023
- Updated on January 6, 2023
- 4469 Views
For MPLS forwarded traffic the tunnel destination needs to know the address-family of the payload IP/IPv6 packet to correctly parse the header. On some platforms this address-family is deduced from the address family of the Bottom of stack( BOS ) MPLS label seen by the router or by relying on the Ether Type in the Ethernet header.
- Written by Lavanya Conjeevaram
- Posted on June 6, 2017
- Updated on December 22, 2017
- 6726 Views
MPLSoGRE Filtered Mirroring is a specialized version of Mirroring to GRE Tunnel and Filtered Mirroring in which
- Written by Matthew Carrington-Fair
- Posted on October 20, 2021
- Updated on December 30, 2021
- 6306 Views
Prior to EOS 4.27.0F, MPLS tunnel egress counters could only be enabled for all MPLS tunnels present in the system
- Written by Shriprama Rao
- Posted on November 20, 2023
- Updated on November 20, 2023
- 3769 Views
This feature allows encapsulating (and decapsulating) L2 traffic from a given interface or subinterface over a GRE tunnel. An MPLS label is added to identify the ingress interface (similar to MPLS pseudowires) and the GRE tunnel is used to transport the packets to a remote endpoint.
- Written by Navneet Sinha
- Posted on June 29, 2016
- Updated on November 17, 2016
- 6979 Views
The Label Distribution Protocol (LDP) is a protocol in the Multiprotocol Label Switching (MPLS) context that allows
- Written by Rick Porter
- Posted on June 10, 2019
- Updated on April 27, 2020
- 6161 Views
This feature allows customers to run Label Distribution Protocol (LDP) on a subset of the interfaces that run Multi
- Written by Pedro Coutinho
- Posted on December 22, 2020
- Updated on October 10, 2022
- 10097 Views
The LDP pseudowire feature provides support for emulating Ethernet connections over a Multiprotocol Label
- Written by Yuanzhi Gao
- Posted on November 12, 2019
- Updated on November 12, 2019
- 6207 Views
MPLS ping/traceroute utility is extended to support liveness checking of Nexthop Group tunnel endpoint (MPLS
- Written by Bhavin Patel
- Posted on January 17, 2022
- Updated on January 17, 2022
- 6073 Views
Arista EOS currently supports a maximum 6 labels push on R2 and R3 series platforms. This feature increases maximum
- Written by Simon Liang
- Posted on June 10, 2019
- Updated on March 13, 2020
- 6040 Views
Normally, Multiprotocol Label Switching (MPLS) determines the packet forwarding destination based on the top most
- Written by Shriprama Rao
- Posted on August 23, 2022
- Updated on June 21, 2023
- 5909 Views
This feature allows users to preserve IP TTL and MPLS EXP (also known as TC) value on MPLS routers, as well as add a user-specified TTL/EXP value when pushing new MPLS labels in pipe mode.
- Written by Anil Joshi
- Posted on June 29, 2016
- Updated on November 3, 2022
- 7611 Views
MPLS-over-GRE encapsulation support in EOS 4.17.0 enables tunneling IPv4 packets over MPLS over GRE tunnels. This feature leverages next-hop group support in EOS. With this feature, IPv4 routes may be resolved via MPLS-over-GRE next-hop group to be able to push one MPLS label and then GRE encapsulate the resulting labelled IPv4 packet before sending out of the egress interface.
- Written by Pedro Coutinho
- Posted on June 4, 2020
- Updated on June 4, 2020
- 6287 Views
EOS version 4.24.1F introduces support for specifying multiple vias to form ECMP in MPLS static tunnels. A new
- Written by Wade Carpenter
- Posted on August 16, 2018
- Updated on May 22, 2024
- 7027 Views
IP traceroute and path MTU (PMTU) discovery both require that routers send ICMP reply messages to the host that invokes each network function. When the route to the destination host traverses an MPLS label-switched path (LSP), the label switching routers (LSRs) will also need to send ICMP reply messages to the originating host.
- Written by Weichen Zhao
- Posted on May 12, 2022
- Updated on May 13, 2022
- 5729 Views
Generic UDP Encapsulation (GUE) is a general method for encapsulating packets of arbitrary IP protocols within a UDP tunnel. GUE provides an extensible header format with optional data. In this release, the ability to encapsulate MPLS over GUE packets of variant 1 header format has been added.
- Written by Xuan Qi
- Posted on August 23, 2022
- Updated on April 4, 2024
- 8018 Views
This feature extends the multi-domain EVPN VXLAN feature introduced to support interconnect with EVPN MPLS networks. The following diagram shows a multi-domain deployment with EVPN VXLAN in the data center and EVPN MPLS in the WAN. Note that this is the only supported deployment model, and that an EVPN MPLS network cannot peer with an EVPN MPLS network.
- Written by Xuan Qi
- Posted on April 18, 2024
- Updated on April 18, 2024
- 1675 Views
This feature adds all-active (A-A) multihoming support on the multi-domain EVPN VXLAN-MPLS gateway. It allows L2 and L3 ECMP to form between the multihoming gateways on the TOR devices inside the site and on the gateways in the remote sites. Therefore, traffic can be load-balanced to the multi-homing gateway and redundancy and fast convergence can be achieved.
- Written by Ashish Goyal
- Posted on June 29, 2023
- Updated on July 11, 2023
- 4425 Views
This feature enables Qos policy-maps to match on IPv4/IPv6 fields for L3VPN & 6PE services on the LER device core facing interface, assuming all labels are popped and packets are sent to the customer as IP.
- Written by Paulo Panhoto
- Posted on December 15, 2020
- Updated on August 19, 2021
- 6920 Views
This is an extension to BGP MPLS VPNs that allows us to use iBGP as the PE CE protocol. This feature also provides a way to
- Written by Dragos Maftei
- Posted on December 16, 2021
- Updated on December 16, 2021
- 6088 Views
This feature adds RSVP information for three tables from MPLS TE STD MIB:. mplsTunnelTable.
- Written by Rajan Keshari
- Posted on January 30, 2024
- Updated on June 10, 2024
- 1859 Views
When MPLS (Multiprotocol Label Switching) LFIB (Label Forwarding Information Base) lookup fails, typical forwarding behavior is to drop such packets. This feature allows fallback IP lookup when MPLS lookup fails and forwards traffic to an IP path by looking up the packet’s destination IP address in the route table if the network topologies have labeled paths programmed & IP based routes are also available for the same destination. This feature is also supported with optimized IPv4 8-to-1 route scale compression.
- Written by Sandeep Kopuri
- Posted on October 7, 2019
- Updated on May 17, 2024
- 9739 Views
Topology Independent Fast Reroute, or TI-LFA, uses IS-IS SR to build loop-free alternate paths along the post-convergence path. These loop-free alternates provide fast convergence.
- Written by Dana Cook
- Posted on March 3, 2023
- Updated on March 3, 2023
- 3844 Views
The MPLS LFIB counters feature was enhanced to add support for counting labels that correspond to VRF termination labels. The full details of the MPLS LFIB counters feature can be found in the original
- Written by Abhiram Kalluru
- Posted on June 16, 2022
- Updated on June 17, 2022
- 4886 Views
This feature allows LFIB (Label Forwarding Information Base) & associated counters export through OpenConfig mpls AFT (Abstract Forwarding Tree) YANG model.
- Written by Kaladhar Musunuru
- Posted on January 23, 2019
- Updated on January 23, 2019
- 4974 Views
This feature provides total ingress MPLS packet and byte counters received per interface. DCS