The hardware table used to store IPv6 routes with a mask > 64 bits has no available entries. Any IPv6 unicast packet to a destination that would have matched the route that is not present in the HW table may be incorrectly forwarded. This message will be logged at most 1 time per hour when new IPv6 unicast route entries trigger this condition.
An associated debug-summary severity message "HAL.IPv6FIB.LongMskTblFullEnt" can be enabled to view per-occurrence details including the subnet and next hop IP address. The solution to this issue is to reduce the number of customer installed ACLs until there are HW entries available for the IPv6 routes with masks > 64 bits. In addition, "debug hal show ipv6fib" can be used to determine which IP unicast route entries were not added to hardware. Any entry in this display without the "F" (Forwarded to hardware) flag is not currently programmed in hardware. Even an entry in this display with the "F" (Forwarded to hardware) flag may not be currently programmed in hardware on all BD8800 I/O modules or SummitStack nodes. Use the "debug hal show ipv6fib slot N" on such a module or node, and look for the "S" (Setup in hardware) flag.
Warning
IPv6 route with > 64 bit mask not added. Hardware Table not available for IPv6 routes with Long Masks.
Print
this page
Email this topic
Feedback
View PDF
Download EPUB