Cisco Cisco IOS Software Release 12.4(23)

Conditions: This symptom is observed on a Cisco 7200 series that runs Cisco IOS interim 
Release 12.4(3.9)T1 when the ip cef command is enabled. The symptom may also affect other 
platforms and may also occur in Release 12.4.

Workaround: Do not enter the debug vpdn packet command.

First Alternate Workaround: Disable CEF by entering the no ip cef command before you enter the 
debug vpdn packet command. When the debug output is generated, re-enable CEF by entering the 
ip cef command.

Second Alternate Workaround: When traffic has started to flow, enter the show vpdn command 
before you enter the debug vpdn packet command. 

CSCej45061

Symptoms: Attempts to remove a PRI group fail.

Conditions: This symptom is observed when an NFAS group has group number 0 and when you 
attempt to remove a FAS PRI group.

Workaround: Shut down the NFAS group before you remove the FAS PRI group. 

CSCin92814

Symptoms: A router crashes when you enter the no ip vrf vrf-name global configuration command.

Conditions: This symptom is observed only when you remove the VRF configuration immediately 
after removing VRF forwarding from an interface.

Workaround: Wait for 60 seconds between removing VRF forwarding from the interface and 
removing the VRF configuration. 

CSCsa42221

Symptoms: A call reference flag is missing from a TBCT request message to a third-party vendor 
ISDN switch.

Conditions: This symptom is observed on a Cisco AS5400 but may also occur on other platforms.

Workaround: There is no workaround. 

CSCsa55747

Symptoms: The RADIUS L2TP-specific disconnect code value for the Ascend-Disconnect-Cause 
RADIUS attribute (195) is incorrectly generated as 607 instead of 605.

Conditions: This symptom is observed when an L2TP tunnel setup failure occurs between a LAC 
and an LNS.

Workaround: There is no workaround. 

CSCsa73159

Symptoms: No final billing record is made for a call.

Conditions: This symptom is observed when a call is made using a Two B-Channel Transfer (TBCT) 
TCL script in the following scenario:

The Telco switch signals the TBCT call with a special FACILITY message.

A call leg is created between point A and point B, and another call leg is created between 
point C and point D.

TBCT connects point A to point D to release the TDM resources.

A billing start record is made for each call leg.

When the final call between point A and point D is released and a NOTIFY message is received, 
no final billing record is made for this call.