Evpn (7432) load-balancing flow-label support in ios-XR for 9K and NCS

[Mollerstrom]

Hello, regarding: Evpn using load-balancing flow-label static (signalled is not an option in ios-xr) on top of MPLS.

Any experience on running evpn and flow (aka fat) label in ios-xr, I enabled it in the lab but got quite strange behaviour, sometimes it's working and sometimes it's not , so writing a post here to try to sort out if its supported, on what hardware and softare before doing further analysis/testing in the lab.

evpn

evi 1234
bgp
route-target import 1234:123400
route-target export 1234:123400
!
load-balancing
  flow-label static
!
advertise-mac
!
!
source interface Loopbackx
!

Platforms/ios-xr version

ASR9K RSP440/880 Tomahawk och typhoon. 6.4.2/6.7.3

NCS55A2 (j+)7.4.1

NCS540 (qumran) 7.4.1

NCS57C4 (j2c) 7.4.1

PS works pretty good without " load-balancing flow-label static"

regards Jonas

[tkarnani]

there are a few restrictions that you need to be aware of

https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5500/vpn/66x/b-l2vpn-cg-ncs5500-66x/b-l2vpn-cg-ncs5500-66x_chapter_01011.html

To configure flow label for EVPN VPWS, the following restrictions are applicable:

  *   This feature is not supported for EVPN Point-to-Multipoint (P2MP) of VPLS and Ethernet LAN (E-LAN) service.
  *   This feature is supported only for EVPN VPWS single homing. AC bundle interfaces must be configured with ESI-0 only.
  *   This feature is not supported for EVPN flexible cross-connect service.
  *   This feature is not supported for EVPN VPWS multihoming.

[Mollerstrom]

Hi tkarnani and thank you for the information provided, that explains the results in the lab.

rgs

Jonas