Cisco Cisco IOS Software Release 12.4(2)XB6

To minimize issues with high CPU usage for additional reasons, such as periods of high PPP 
PDP processing (creating and deleting), disable the notification of interface data link status 
changes on all virtual template interfaces of the ASNGW using the no logging event link-status 
interface configuration command.

!

interface Virtual-Template1

description ASNGW-VT

ip unnumbered Loopback0

encapsulation gtp

gprs access-point-list gprs

end

Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most 
serious caveats; severity 2 caveats are less serious. 

Caveats for Cisco IOS Releases 12.3 can be found on Cisco.com at 
http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/prod_release_notes_list.html 

The 

 section lists open caveats that apply to the current release and might also apply to 

previous releases.

The 

 section lists caveats resolved in a particular release, which may have been open 

in previous releases.

If you have an account with Cisco.com, you can use Bug Navigator II to find caveats of any severity for 
any release. You can reach Bug Navigator II on Cisco.com at Software Center: Cisco IOS Software: 
Cisco Bug Toolkit: Cisco Bugtool Navigator II, or at http://www.cisco.com/support/bugtools.

The following caveats are unresolved in Cisco IOS Release 12.4(15)XL.

CSCsk77506—SAMI LCP Hangs With ASNGW SR When a Switchover Happens

When repeated failovers (around 20 times) have been done in short duration (approximately, 4 
hours), a processor in the standby card goes to a hung state. 

The problem is seen in the lab after a high number of forced switchovers (~20) in a very short 
duration. The problem impacts the processor in the standby card.

In such a state, the following message might be printed. 

“1w3d: %SVCLC-5-SVCLCNTP: Could not update clock on the module 3, rc is -1”

Workaround: issue the hw-module module slot-num reset command on the standby card.