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Cisco Bug: CSCvv52840 - Process fib_mgr is blocked by iptunnelencap_get on reload

Last Modified

Oct 09, 2020

Products (1)

  • Cisco Network Convergence System 5500 Series

Known Affected Releases


Description (partial)

After a line card or box reload, the router might be experiencing some, but not limited to,  symptoms below:
- show command on cef might get timeout for the reloaded line card
- High CPU seen caused by process fib_mgr
- Process fib_mgr blocked in mutex seen
- Some ACL/QoS configuration might miss under the interfaces on the reloaded line card
- ping to or from a physical interface on the reloaded line card might fail

A big number of prefixes in the routing table uses the tunnel IP interface as the next hop; if the ECMP exists , it will add another scale factor to cause the issue as well.
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