The hardware table used to store IPv6 routes with a mask > 64 bits has been exceeded and at least one IPv6 unicast route entry could not be added to the hardware. Any IPv6 unicast packet to a destination not present in the HW table used for routes with > 64 bit masks 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. 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. If IPv6 route compression is not enabled, enabling it will reduce the number of entries in the HW tables for routes with masks > 64 bits.
Warning
IPv6 route with mask > 64 bits not added. Long Mask Hardware Table full. (Logged at most once per hour.)
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