The hardware Longest Prefix Match table has been exceeded and the specified IPv6 unicast route entry could not be added to the hardware. The routes with the longest subnet mask lengths are maintained in the LPM table. Any IPv6 unicast packet to a destination not present in the LPM routing table will be slowpath forwarded.
"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.
Debug-Summary
IPv6 route vrId %vrId% %destAddr%/%maskLen% nexthop %nexthop% not added to hardware. Hardware LPM Table full.
| Name | Type |
|---|---|
| vrId | uInt32 |
| destAddr | dstIPv6 |
| maskLen | IPmasklen |
| nexthop | IPv6 |