Cisco Cisco IOS Software Release 12.2(27)SBC

The Timer and Retry Enhancements for L2TP and L2F feature introduces configurable control packet 
timers and retry counters for Layer 2 Transport Protocol (L2TP) and Layer 2 Forwarding (L2F) virtual 
private dialup network (VPDN) tunnels. Adjustments to these timers and counters allows you to 
configure the following parameters:

The amount of time that a router will wait for a reply while establishing a VPDN tunnel. 

The number of times a router will try to contact a peer.

The amount of time that a router will wait before trying to contact an alternate VPDN peer. 

These customizable timers and counters allow fine-tuning of router performance to suit the particular 
needs of the VPDN deployment. 

Configuration information is included in the “VPDN Tunnel Management” module in the 

, Release 12.4T, at the following URL:

This section documents modified commands.