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
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
THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.
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.