About nkarpysh

nkarpysh · 04-30-2021

Introduction In EVPN A/A + IRB both PE in same EVI have BVI playing a default GW role. Its not supported to have BVI to be shutdown on one of PEs, In this case if if traffic hit this PE with DMAc equal to BVI Custom MAC, then it will drop this traff...

nkarpysh · 12-03-2019

IntroductionPrevious BehaviorCurrent BehaviorIntroduced byProblemExample of outputRecommendation to prevent problem Introduction According to the RFC 7432: Extended Community enables split-horizon procedures for multihomed sites. The ESI Label field...

nkarpysh · 10-08-2019

Hi All, In scaled EVPN deployments it can be wise to name ESI that way to represent the site/physical port/etc it is attached to. Thus on some remote location you can easily verify where particular route/MAC is coming from. Similar to phone numbers, ...

nkarpysh · 03-16-2012

Goal: Build a set of R&S bookmarks from this forum, Cisco CCO and other available resources.Platform specific6500:HW:Cheat-sheet for Catalyst 6500 with Sup 720FAQ - Catalyst 6500 HardwareSW:Other:4500:3750, 3650, etc.Nexus:Troubleshoot and AlertsProt...

nkarpysh · 11-18-2024

Hi Sami, for the ring its preferable to use Single-Flow-Active load-balancing mode. Niko

nkarpysh · 10-29-2024

I think you also need to switch port to trunk as on ASR9k side you expect encapsulated packets. Access port does not tag the packets thus you my not hit thr proper sub-interface on the ASR9k side. As you dont have an IRB you may not even need to stip...

nkarpysh · 10-22-2024

Hey, From above we can see LB mode is SFA and convergence on ring failure is 300 seconds. In SFA convergence on the ring side will be achieved by the TCN coming from the ring to one of the PEs which will initiate the switchover/MAC flush. As converge...

nkarpysh · 09-03-2024

Try: rewrite ingress tag pop 2 symmetric instead on all interfaces. That should strip both tag when packet enters the bridge domain and on egress it should symmetrically push two tags based on interfaces encap.

nkarpysh · 08-20-2024

I dont have any links for the best poractices, but if you are looking for config smth like this should work: interface GigabitEthernet1/2/3 l2transport encapsulation untagged ! interface BVI258 vrf mobile_core_cp ipv4 address 192.168.124.34 255....

Member Since	‎10-11-2011 08:38 PM
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EVPN IRB A/A Does not support BVI shutdown on single PE

Behavior change: EVPN ESI Label encoding in BGP Extended Community

EVPN Constructing Ethernet Segment Identifier (ESI)

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