Evpn vxlan mp-bgp : path is invalid(no RMAC)

[nicolas.clementz]

In a two nexus 93180YC-EX (version 7.0(3)I7(3)) topology, configured with vxlan and evpn, I'm unable to get two hosts which are on two different vlan to communicate.  L2 communication works but not l3

I have this error :

nexus2# sh bgp vrf tenant-1 l2vpn evpn 10.3.26.4
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 10.0.0.200:32961
BGP routing table entry for [2]:[0]:[0]:[48]:[0050.56bf.1718]:[32]:[10.3.26.4]/248, version 5069

Paths: (1 available, best #0)
Flags: (0x000202) (high32 00000000) on xmit-list, is not in l2rib/evpn, is not in HW

  Path type: internal, path is invalid(no RMAC), no labeled nexthop
  AS-Path: NONE, path sourced internal to AS
    10.0.0.200 (metric 41) from 10.0.0.200 (10.0.0.200)
      Origin IGP, MED not set, localpref 100, weight 0
      Received label 10194 100194

What is the right way to configure IRB routing in a fabric ?

Thanks a lot

Nicolas
      Extcommunity: RT:65000:10194 RT:65000:100194 ENCAP:8

[nicolas.clementz]

just miss vlan for the VRF

vlan 101
vn-segment 100194

[Giuseppe Larosa]

Hello Nicholas,

in what device have you applied this change on Nexus2 ?

>> vlan 101
vn-segment 100194

it is appplied to L2 brodacast domain vlan 101 not to SVI interface Vlan 101 . is it correct ?

Best Regards

Giuseppe

[nicolas.clementz]

Hi Giuseppe,

vlan dedicated to the VRF (vlan 110) need to be added on both nexus.

Without vlan 101, the VRF Tenant-1 don't do his routing job

Yes, L2 broadcast domain vlan

Regard,

Nicolas

[Vick28719]

Route-map permitall permit 10
  set ip next-hop unchanged

Just wondering why do you have this, as when the routers are trying to do IRB, if you dont set the next hop properly, then the router at far end would advertising as it is, and while doing recursion since the far end hosts wont know where to forward the traffic it might fail the traffic forwarding.