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ARP/ND Suppression

Info

Notes:

  • ARP/ND suppression does not suppress RA/RS packets.
  • When configuring ARP/ND suppression, do not forget to configure the L3 VLAN interface corresponding to the VNI ID associated by VLAN ID.

           Example configurations:

Code Block
set vlans vlan-id 10
set vxlans vni 10010 vlan 10
set vlans vlan-id 10 l3-interface vlan10
set l3-interface vlan-interface vlan10
set vxlans vni 10010 arp-nd-suppress disable false

In MP-BGP EVPN networks, in order to suppress network storms caused by ARP/ND broadcast message flooding, ARP/ND suppression function can be enabled on VTEP devices to reduce network traffic.

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In EVPN distributed networks, users can configure the same anycast gateway IP and the same virtual MAC (router MAC) on all distributed gateways to enable the anycast gateway function. And also, configure the same IP default gateway address on all hosts or VMS. After that, irrespective of which VTEP the host connected to, as long as they are connected to within the same VNI, end hosts they can always use their connected VTEPs as the default gateway to send and receive traffic. Since all hosts within a VLAN are configured with the same IP default gateway address, all hosts or VMs can be easily moved throughout the data center without changing their configuration. This provides flexible VM mobility between different distributed gateways in the network.

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