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Cisco Bug: CSCvv05805 - MTC_USD crash seen while executing active buffer monitor show command

Last Modified

Oct 09, 2020

Products (55)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 92304QC Switch
  • Cisco Nexus 31108TC-V Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 92160YC-X Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 9396PX Switch
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Known Affected Releases

7.0(3)I7(6)

Description (partial)

Symptom:
The mtc_usd driver process may crash while executing buffer monitor CLI command.

The following would be seen in the log
`show logging log`
2020 Jul 18 05:10:06 switch %$ VDC-1 %$ %SYSMGR-SLOT1-2-SERVICE_CRASHED: Service "mtc_usd" (PID 28711) hasn't caught signal 11 (core will be saved).
switch %$ VDC-1 %$ %SYSMGR-SLOT1-2-HAP_FAILURE_SUP_RESET: Service "mtc_usd" in vdc 1 has had a hap failure
switch %$ VDC-1 %$ %SYSMGR-SLOT1-2-LAST_CORE_BASIC_TRACE: fsm_action_become_offline: PID 16896 with message Could not turn off console logging on vdc 1 error: mts req-response with syslogd in vdc 1 failed (0xFFFFFFFF)  .
switch %$ VDC-1 %$ %USER-2-SYSTEM_MSG: libsdk_tlv_dispatch:51: sse_call2 failed with rc=-1(Device Name:[0x3FF] Instance:[63] Error Type:[(null)] code:[255])  - iftmc
switch %$ VDC-1 %$ %USER-2-SYSTEM_MSG: libsdk_tlv_fe_handler:216: TLV dispatch function failed, rc = -5(RPC error)  - iftmc
switch %$ VDC-1 %$ %USER-2-SYSTEM_MSG: libsdk_l3_route_stats_get:268: TLV front-end handler failed, rc = -5(RPC error)  - iftmc
switch %$ VDC-1 %$ %SYSMGR-SLOT1-2-LAST_CORE_BASIC_TRACE: core_client_main: PID 30213 with message filename = 0x102_mtc_usd_log.28711.tar.gz .
switch %$ VDC-1 %$ %MODULE-2-MOD_DIAG_FAIL: Module 1 (Serial number: XXXXXXXXXX) reported failure due to Service on linecard had a hap-reset in device DEV_SYSMGR (device error 0x44a)

Conditions:
The mtc_usc crash may be triggered when executing below active buffer monitor CLI command:

show hardware profile buffer monitor buffer-block 1 detail
show hardware profile buffer monitor buffer-block 2 detail
show hardware profile buffer monitor buffer-block 3 detail
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