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Cisco Bug: CSCtb57381 - High CPU due to null0 routes

Last Modified

Jan 27, 2017

Products (1)

  • Cisco Catalyst 4000 Series Switches

Known Affected Releases


Description (partial)


CPU level is randomly raising to 70-90% in L3 Fwd Low / K2AccelPacketMan: Tx.


Classic non E-series module running 12.2(50)SG4/5, 12.2(52)SG/XO or 12.2(53)SG.
There is a high number of static routes pointing to Null0.
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