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Cisco Bug: CSCun78994 - Packets seen as runts on the neighbor when decapsulating dot1q/mpls

Last Modified

Jul 22, 2020

Products (1)

  • Cisco Catalyst 6000 Series Switches

Known Affected Releases

12.2(33)SXI6 15.1(2)SY1.9

Description (partial)

Symptom:
Runt counter increase on the neighbor device connected to 6880 / 6904 port working at 1Gbps.

Conditions:
Packet received needs to have additional headers that need to be replaced as part of the rewrite (due to removal of dot1q / mpls etc.) by ethernet padding data and then further sent on port that operates in 1Gbps on 6880 device or 6904 linecard.
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