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Cisco Bug: CSCuw35544 - CGE7,SysBuff exhaust due to conf/unconf qlimit causing fairq qlimit go wild

Last Modified

Sep 19, 2017

Products (16)

  • Cisco IOS
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901-6CZ-FT-A Router
  • Cisco ASR 901-12C-FT-D Router
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Known Affected Releases

15.6(1)S

Description (partial)

Symptom:
Verifying that changing the min bandwidth of the FQ class on the grandchild of a three level queueing policy is not working as expected.

Usr1 Class 1 rate off by more than 3%
 Rate Expctd: 66500000.0
 Rate Recvd: 68843232
 Usr1 Class 1 rate off by more than 3%
 Usr1 Class 3 rate off by more than 3%
 Expctd: 24500000.0
 Recvd: 26945040
 Usr1 Class 3 rate off by more than 3%
 Usr1 Class 4 rate off by more than 3%
 Rate Expctd: 84000000.0
 Rate Recvd: 64722816
 Usr1 Class 4 rate off by more than 3%
 Usr2 rate off by more than 3%
 Rate Expctd: 308000000.0
 Rate Recvd: 317664192
 Usr2 rate off by more than 3%


Traffic rate is off by 3%.

Also traceback is generated by hitting the below error.

show logging | include %[^-]*-[01234]-[^:]*: | Traceback
*Sep 22 09:27:39.780: %LINK-3-UPDOWN: Interface GigabitEthernet0/0/1, changed state to down
*Sep 22 09:27:43.789: %LINK-3-UPDOWN: Interface GigabitEthernet0/0/1, changed state to up
*Sep 22 09:30:37.040: %IOSXE-2-PLATFORM:cpp_cp: QFP:0.0 Thread:002 TS:00000000530216739408 %HAL_PKTMEM-2-OUT_OF_RESOURCES:  -Traceback=1#26ff71edad6e8ed055dc115cb326bf66 1033f9ac 1033ff10 10cb87bc 1003d2d0 10a44668 10a450d4 10a45a20 10000308

Conditions:
Verify the on-the-fly policy setting change when traffic is passing.
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