Note
DHCPv6 over VxLAN is not supported on SLX-OS.A DHCP relay agent (RA) is a device that forwards DHCP packets between DHCP clients and DHCP servers. RAs are used to forward requests and replies between DHCP clients and DHCP servers when they are not located in the same physical subnet.
DHCPv4 packets are Layer 2 broadcast packets and these packets are flooded into the broadcast domain (BD) by the RA. When all MCT leafs in an IP-Fabric deployment are configured to be DHCP RAs, it creates a scenario where these packets create unnecessary flood traffic along with a possibility of looping. It is to control this flooding of DHCPv4 broadcast packets, the ip dhcp relay disable-flooding is used.
The non DHCP RA interfaces will still continue to flood the BD with DHCP packets and are not affected by this setting.
To prevent the flooding of DHCPv4 broadcast packets from the DHCP RA: