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Cisco Bug: CSCvu23889 - Macsec session flapping continuously on HundredGigE Intf due to CRC Error after Commit Replace

Last Modified

Sep 14, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

7.1.2.BASE

Description (partial)

This issue is seen only when we move from Macsec to Non macsec & vice versa continuously.

Symptom:
Macsec session flapping continuously on HundredGigE Intf due to CRC Error after Commit Replace

Conditions:
In 712 Image, while testing MACSEC on ASR9K Chassis could see Macsec session flapping continuously on HundredGigE Interfaces due to CRC Error after Commit Replace.

LC/0/0/CPU0:May 11 10:29:21.917 UTC: macsec_mka[135]: %L2-MKA-5-SESSION_STOP : (Hu0/0/0/0) MKA session stopped, CKN:1234 
LC/0/0/CPU0:May 11 10:29:21.917 UTC: macsec_mka[135]: %L2-MKA-4-SESSION_UNSECURED : (Hu0/0/0/0) MKA Session was stopped and is not secured, CKN:1234 
LC/0/0/CPU0:May 11 10:29:55.933 UTC: macsec_mka[135]: %L2-MKA-5-SESSION_STOP : (Hu0/0/0/0) MKA session stopped, CKN:1234 
LC/0/0/CPU0:May 11 10:29:55.933 UTC: macsec_mka[135]: %L2-MKA-4-SESSION_UNSECURED : (Hu0/0/0/0) MKA Session was stopped and is not secured, CKN:1234 
LC/0/0/CPU0:May 11 10:30:31.952 UTC: macsec_mka[135]: %L2-MKA-5-SESSION_STOP : (Hu0/0/0/0) MKA session stopped, CKN:1234 


RP/0/RSP1/CPU0:WebOTT-LER4#sh int hundredGigE 0/0/0/0 
HundredGigE0/0/0/0 is up, line protocol is up 
     1014 packets input, 1905275 bytes, 0 total input drops
     0 drops for unrecognized upper-level protocol
     Received 2 broadcast packets, 1012 multicast packets
              0 runts, 135 giants, 0 throttles, 0 parity
     638 input errors, 503 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     2896 packets output, 280397 bytes, 0 total output drops
     Output 0 broadcast packets, 2896 multicast packets
 
RP/0/RSP1/CPU0:WebOTT-LER4#sh int hundredGigE 0/0/0/0 
HundredGigE0/0/0/0 is up, line protocol is up 
     1024 packets input, 1925531 bytes, 0 total input drops
     0 drops for unrecognized upper-level protocol
     Received 2 broadcast packets, 1022 multicast packets
              0 runts, 136 giants, 0 throttles, 0 parity
     645 input errors, 509 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     2926 packets output, 283400 bytes, 0 total output drops
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