Configuring DHCPv6 Relay Agent Prefix Delegation Notification

You can set the number of delegated prefixes that can be learned at the global level. By default, DHCPv6 Relay Agent Prefix Delegation Notification is enabled when the DHCPv6 relay agent is enabled on an interface.
You can disable the DHCPv6 Relay Agent Prefix Delegation Notification at the system or the interface level by setting the IPv6 DHCP relay maximum delegated prefixes to 0 at the system or interface level as required.

Make sure that there is enough free space in the flash memory to save information about delegated prefixes in flash on both the Active and Standby management processor.

  1. Enter global configuration mode by issuing the configure terminal command. 
    device# configure terminal
  2. Set the maximum number of prefixes that can be learned at the global level. 
    device(config)# ipv6 dhcp-relay maximum-delegated-prefixes 500
    You can limit the maximum number of prefixes that can be learned at the global level. The range is from 0 through 512. The default value is 500. The DHCPv6 prefix delegation default for ICX 7750 and ICX 7850 devices is 50.

The following example sets the maximum number of prefixes that can be learned at the global level to 500. 

device# configure terminal
device(config)# ipv6 dhcp-relay maximum-delegated-prefixes 500
Parent topic: DHCP relay agent for IPv6