The tmnxWlanGwSubIfPmAddNewPlFailed notification is sent when adding a new pool, given by the DHCPv6 server, is failing. (Examples : conflict with existing pool, subnet too small, maximum number of pools reached, out of memory, etc.) [CAUSE] Failed to add a new pool given by the server. [EFFECT] The ISA-BB may run out of free DHCPv6 addresses or SLAAC prefixes. [RECOVERY] No recovery is needed. Retry periodically.