Cisco Cisco IOS Software Release 12.4(4)T

Cisco IOS Release 12.4(6)T5 is a rebuild release for Cisco IOS Release 12.4(6)T. The caveats in this 
section are resolved in Cisco IOS Release 12.4(6)T5 but may be open in previous Cisco IOS releases. 

The following information is provided for each caveat:

Symptoms—A description of what is observed when the caveat occurs.

Conditions—The conditions under which the caveat has been known to occur.

Workaround—Solutions, if available, to counteract the caveat.

CSCsd74139

Symptoms: HTTP errors occur while accessing a Win2003 Web Server.

Conditions: This symptom has been observed with a Cisco IOS Voice gateway running Cisco IOS 
Release 12.4(6)T accessing a Win2003 HTTP web server under heavy load. Cisco IOS Voice has ip 
http client connection persistent disabled.

Workaround: There are two possible workarounds:

Switch to a Win2000 HTTP web server.

On a Win2003 server, set "TcpTimedWaitDelay" to the minimum (30 seconds). This does not 
totally eliminate but will reduce the occurrences of dropped TCP SYN requests from the Cisco 
IOS router. 

CSCsg26634

Symptoms: CPUHOG can occur when running lots of BGP connections.  

Conditions: This symptom has been observed with a Cisco IOS Voice gateway running Cisco IOS 
Release 12.4(6)T.

Workaround: There is no workaround, though the symptom was quickly found and repaired.

Cisco IOS Release 12.4(6)T4 is a rebuild release for Cisco IOS Release 12.4(6)T. The caveats in this 
section are resolved in Cisco IOS Release 12.4(6)T4 but may be open in previous Cisco IOS releases. 

The following information is provided for each caveat: