Wired Intelligent Edge

 View Only

  • 1.  VxLAN-EVPN - redistribute host-route not working

    Posted Sep 10, 2023 07:57 AM
    We have the below topology. Leaf1A/B in sites 1 and Leaf2A/B in site 2. We have two DCI links connected like below.
     
    Leaf1A<--VSX-->Leaf1B 
       |             |
       |             |
    Leaf2A<--VSX-->Leaf2B
     
    Leafs in each site are in VSX with anycast gateway. Have configured L3 DCI with L3VNI.
     
    The topology works fine when we REMOVE the "redistribute host-route" under evpn. We are able to reach from one vlan to another via vxlan-evpn to the other side.
     
    evpn
        arp-suppression
        vlan 180
            rd auto
            route-target export 64xxx:180
            route-target import 64xxx:180
            redistribute host-route
        vlan 181
            rd auto
            route-target export 64xxx:181
            route-target import 64xxx:181
            redistribute host-route
     
    When add the redistribute host-route we are loosing the connectivity to the remote end.
     
    In routing table we are not able to see /32 routes when redistribute host-route is removed, which is as per design, we have ARP/MAC entry for the remote end hosts. 
     
    When redistribute host-route is added then /32 routes comes back on the routing table but remote hosts does not ping.
     
    Any idea what is the issue?


  • 2.  RE: VxLAN-EVPN - redistribute host-route not working

    Posted Sep 11, 2023 01:45 AM

    Hi

    Could you please share a bit more information like:

    • What platform / model are you using?
    • What software version have you installed?
    • Running-Config of "interface vxlan 1"
    • Running-Config of "router bgp xxxxxx"
    • Running-Config of "interface vlan 180" and "interface vlan 181"
    • IP-address of the logical VTEP per VSX cluster
    • Running-Config of "vrf" section where vlan180 and vlan181 are routed. 
    • Routing table of the respective VRF
    • Output of "show bgp l2vpn evpn route-type 2" showing the MAC of the hosts in question

    Thanks

    Thomas




  • 3.  RE: VxLAN-EVPN - redistribute host-route not working

    Posted Sep 12, 2023 02:40 AM

    By the way, I recently ran into the issue with a similar config that I lost some traffic in the network with 8360 models. This could be fixed by adding the l3-src-mac option to the VLAN's active-gateway configuration. You need 10.10.1040 software for that AFAIK. I'm wondering whether you are confronted with the same here.


    Original Message


  • 4.  RE: VxLAN-EVPN - redistribute host-route not working

    Posted Sep 15, 2023 08:29 AM

    I will try this and let you know.


    Original Message


  • 5.  RE: VxLAN-EVPN - redistribute host-route not working

    Posted Sep 15, 2023 08:29 AM
      |   view attached

    Thanks a lot for reply. I am attaching the outputs here.

    What I could see, the control plane is working with redistribute host routes but the remote side is not reachable, that means somehow the L3VNI is not working. Whereas after removing the redistribute host-route there is no entry for /32 in routing table (which is expected) but reachability is there to remote end that means L2VNI is working.

    Any thoughts would be helpful.


    Attachment(s)

    txt
    Danfoss L3VNI issue.txt   28 KB 1 version
    Original Message


  • 6.  RE: VxLAN-EVPN - redistribute host-route not working

    Posted Oct 16, 2023 08:31 AM

    There is a fantastic blog on this.

    Check out the part config snippet 3: redistribute host route.

    https://www.nullzero.co.uk/evpn-vxlan-explainer-6-symmetrical-irb/



    ------------------------------
    Ole Morten Kårbø
    ACEA | ACSP | APS CX10000 | APS Central | APS SD-Branch
    Netnordic Norway
    ------------------------------

    Original Message


Related Content