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Cisco Bug: CSCum93814 - When ACL match, encaps_flags corrupted by L_RSV_ACL subroutine

Last Modified

Aug 07, 2018

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

5.1.1.BASE 5.1.2.BASE 5.2.0.BASE

Description (partial)

Symptom:
Original failure was due to an invalid L2 header size, because a bit indicating push 1 vlan tag was incorrectly set.  But other failures could occur.  Encaps_flags are getting corrupted for bits indicating: vlan_push_1, vlan_push_2, L2 encap valid smac,  L2 encap tag 1 valid, L2 encap tag 2 valid, L2 encap btag valid, increment stat, L2 etype.

Conditions:
This issue is only encountered when there is an ACL match, with the action being other than DENY.  The failure doesn't happen with DENY, since the frame gets dropped.
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