Auto-generation of the default-gw IPv4 address is supported only in RCO model with routed RGs/CPEs. Bridged RGs/CPEs are not supported.
A configured IPv4 address cannot be removed from the subscriber-interface when DHCPv4 hosts under the corresponding subnet are instantiated in the system.
An IPv4 address cannot be configured under the subscriber-interface while (unnumbered) DHCPv4 hosts under that subnet are already instantiated.
Executing the no allow-unmatching-subnets command is only allowed when there are no unnumbered DHCPv4 hosts instantiated under the subscriber-interface.
An IPoEv4 subscriber host must be either numbered or unnumbered on both the active and standby BNGs in a multi-chassis redundant setup. If an IPoEv4 subscriber host is numbered on one BNG and unnumbered on the other, multi- chassis synchronization fails and displays the Numbered mode does not match message as the delete reason in the output of the tools>dump> redundancy>multi-chassis>sync-database detail command. An IPoEv4 subscriber host is unnumbered when there is no matching IPv4 subnet configured on a subscriber interface with allow-unmatching-subnets (IPv4) or unnumbered (IPv4) enabled.