ARP Suppression in EVPN VXLAN in Sonic

[Sudharshan S]

Hi All,

       I was trying EVPN VXLAN on Sonic on trident3 based Accton boards. I could see the MAC IP route getting exchanged from remote to the local node.

*>i[2]:[0]:[48]:[68:21:5f:9c:fc:7b]:[32]:[10.1.1.2]
                    2.2.2.2                       100      0 i
                    RT:65100:3000 ET:8

root@sonic:/home/admin# ip neigh

10.1.1.2 dev Vlan30 lladdr 68:21:5f:9c:fc:7b extern_learn  NOARP proto zebra

But if an external host is sending an ARP request to 10.1.1.2, I could see that the ARP request is sent over the VXLAN tunnel. I was not able to enable ARP suppression on the device. Is that feature not supported? In EVPN VXLAN HLD I could find reference to it. 

https://github.com/sonic-net/SONiC/blob/master/doc/vxlan/EVPN/EVPN_VXLAN_HLD.md#4310-arp-and-nd-suppression

I also see an open bug. 

https://github.com/sonic-net/SONiC/issues/819

Has ARP suppression support been withdrawn?

 

Any help in this regard would be appreciated. Awaiting your reply.

Thanks,

Sudharshan

[Sudharshan S]

Hi All,

    Could someone please help me out with this query?

Thanks in advance.

Thanks,

Sudharshan

[Masaru OKI]

Hi,

ARP Suppression is supported by Edgecore SONiC, but it is not supported yet in the community edition of the SONiC.

See also https://support.edge-core.com/hc/en-us/articles/900002941566--Enterprise-SONiC-EVPN-ARP-ND-Suppression

2023年4月3日(月) 15:46 Sudharshan S <reachsu...@gmail.com>:

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[Sudharshan S]

Thank you for the information Masaru.

Thanks,

Sudharshan