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Cisco Bug: CSCur30435 - ETSEC tx hung cause LC crash.

Last Modified

Jun 19, 2020

Products (1)

  • Cisco uBR10000 Series Universal Broadband Routers

Known Affected Releases

12.2SC

Description (partial)

Symptom:
LC restarted due to a watchdog timeout related to ETSEC Tx hung. 

Example Log Messages in crashfile:
SLOT 5/0: Oct 16 20:14:50.630 CST: %SW_WDOG-3-SW_WDOG_TIMEOUT: SW Watchdog failed to detect IPC link up
SLOT 5/0: Oct 16 20:14:50.634 CST: %SCHED-0-ISRWATCHDOG: Interrupt of level 0 running for a long time.
-Traceback= 2DBDD0C 2296994 2296994 229C20C 2297B3C 229CC88 229AA0C


In OBFL, many such logs are recorded.
10/05/2014 23:50:06  %UBRCLC-3-ETSEC_TX_FREEZE : CLC Etsec tx freeze: TX head/tail/pending: 225/228/3, RX head/tail: 379/0, freeze counter: 1
10/05/2014 23:50:09  %UBRCLC-3-ETSEC_TX_FREEZE : CLC Etsec tx freeze: TX head/tail/pending: 226/320/94, RX head/tail: 408/0, freeze counter: 3
10/05/2014 23:50:12  %UBRCLC-3-ETSEC_TX_FREEZE : CLC Etsec tx freeze: TX head/tail/pending: 227/57/342, RX head/tail: 496/0, freeze counter: 5
10/05/2014 23:50:15  %UBRCLC-3-ETSEC_TX_FREEZE : CLC Etsec tx freeze: TX head/tail/pending: 228/228/512, RX head/tail: 85/0, freeze counter: 7
10/05/2014 23:50:18  %UBRCLC-3-ETSEC_TX_FREEZE : CLC Etsec tx freeze: TX head/tail/pending: 229/229/512, RX head/tail: 197/0, freeze counter: 9

Conditions:
Occurred during normal operations
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