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Cisco Bug: CSCui92577 - U6RIB-3-U6RIB_ASSERT_ERROR with tracebacks

Last Modified

Sep 13, 2018

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

6.1(4)E2

Description (partial)

Symptom:2013 Aug 14 22:54:40 fc03.frc1 %U6RIB-3-U6RIB_ASSERT_ERROR: ../routing-sw/routing/u6rib/u6rib.c:4573: Assertion "*cand_best_count" failed.
2013 Aug 14 22:54:40 fc03.frc1 %U6RIB-3-ASSERT_ERROR: -Traceback: 0x809dce5 0x805c89a 0x806fe35 0x807003a 0x8071227 0x8073904 0x8075dbc 0x807b44d 0x807cbef librsw.so+0xa73ff libpthread.so.0+0x6140 libc.so.6+0xca8ce 
2013 Aug 14 22:55:43 fc03.frc1 %U6RIB-3-U6RIB_ASSERT_ERROR: ../routing-sw/routing/u6rib/u6rib.c:4573: Assertion "*cand_best_count" failed.

Conditions:Assert will happen only when there is a routing loop present in the network. Whenever a particular route is causing a loop in the network, some of its next hops are marked as HIDDEN. The loop caused involves recursive next-hop.
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