Field Notice: FN - 63288 - "show tech" or "show hardware internal stats" May Lead to Switchover on Supervisor 2 Module Due to Kernel Panic, Run Alternate Patch Before Running Show tech or Upgrade Software
Updated:Nov 04, 2009
Field Notice: FN - 63243 - Microsoft Security patch MS09-014 causing IE 6.0 to crash while generating WebView reports and collecting logs for Support Tools
November 4, 2009
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Initial Public Release.
MDS NX-OS - 4.1
MDS NX-OS - 4.2(1b)
MDS SAN OS - 3.3(4)
Executing any of the following commands on a MDS switch or collecting the same information via Fabric Manager may cause a kernel panic on the supervisor:
show hardware internal mgmt0 stats show hardware internal eobc stats show tech-support show tech-support details tac-pac
4.1(x) 4.2(2) or below
show hardware internal mgmt0 stats show hardware internal eobc stats show tech-support show tech-support details tac-pac show tech-support ha show tech-support sysmgr
This issue is only applicable to switches with Supervisor 2 in MDS9506, MDS9509 or MDS9513 chassis. In a dual supervisor switch this will force a supervisor switchover. In single supervisor systems the switch will reload.
Issuing the commands in succession on a dual supervisor switch will cause a switch reload if the command is executed the second time before it is in a ha-standby state.
The kernel panic is caused by running either of the following statistics commands:
show hardware internal mgmt0 stats show hardware internal eobc stats
This issue only affects removable supervisor 2 modules.
In a dual supervisor switch this will force a supervisor switchover. In single supervisor systems the switch will reload.
Refrain from using "show hardware internal mgmt0 stats" and "show hardware internal eobc stats".
Before running "show tech-support", "show tech-support details" or "tacpac" (from FM/DM or CLI), load a plugin (available at www.cisco.com) which will patch the offending commands. The plug-in should be loaded on the standby supervisor also. The plug-in is not persistent across switchovers and should be loaded any time a switchover occurs.
Upgrade to one of the following software releases when it becomes available.
3.3(4a) or above 4.2(3) or above
Using the Debug Plug-in Commands to issue are in italics.