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Cisco Bug: CSCul90150 - FWM HAP Reset causing both switches in vPC to crash

Last Modified

Jan 29, 2017

Products (7)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

6.0(2)N2(1) 6.0(2)N2(3)

Description (partial)

N5k switches in vPC may face a FWM HAP Reset crash:
2013 Nov 30 23:59:15 Nex55-197 %$ VDC-1 %$  SYSMGR-2-SERVICE_CRASHED  Service "fwm" (PID 3436) hasn't caught signal 6 (core will be saved).
2013 Nov 30 23:59:15 Nex55-197 %$ VDC-1 %$  SYSMGR-2-HAP_FAILURE_SUP_RESET  System reset due to service "fwm" in vdc 1 has had a hap failure

N5k switches in vPC may face a FWM HAP Reset crash:
2013 Nov 30 23:59:15 Nex55-197 %$ VDC-1 %$  SYSMGR-2-SERVICE_CRASHED  Service "fwm" (PID 3436) hasn't caught signal 6 (core will be saved).
2013 Nov 30 23:59:15 Nex55-197 %$ VDC-1 %$  SYSMGR-2-HAP_FAILURE_SUP_RESET  System reset due to service "fwm" in vdc 1 has had a hap failure

Symptom:
N5k switches in vPC may face a FWM HAP Reset crash:
2013 Nov 30 23:59:15 Nex55-197 %$ VDC-1 %$  SYSMGR-2-SERVICE_CRASHED  Service "fwm" (PID 3436) hasn't caught signal 6 (core will be saved).
2013 Nov 30 23:59:15 Nex55-197 %$ VDC-1 %$  SYSMGR-2-HAP_FAILURE_SUP_RESET  System reset due to service "fwm" in vdc 1 has had a hap failure

Conditions:
Crash is resulting after configuring "switchport block unicast/multicast" for FEX member interfaces which are part of PO interface:
switch(config-if)# int eth111/1/3, eth112/1/2
switch(config-if-range)# switchport block unicast
ERROR: Cannot configure CLI on FEX interface that is part of a port-channel
switch(config-if-range)# switchport block multicast
ERROR: Cannot configure CLI on FEX interface that is part of a port-channel
switch(config-if-range)# exit

switch# sh run int po1066 mem
[724086.864483] Shutdown Ports.
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