[c-nsp] Set Virtual-Template 'ip wccp x redirect in' via RADIUS attribute on LNS

[Barry O'Donovan]

Hi folks,

In a nutshell, I have an ISP who has LNS' terminating L2TP tunnels from the 
incumbent telco. These L2TP tunnels are terminated based on domain as is 
common and we have three terminating vpdn-group (two production, one testing). 

Each vpdn-group uses the same virtual template ('virtual-template 1') and this 
template in turn has a hard coded 'ip wccp x redirect in' (where x is the 
configured wccp service id. We'll use 97. 

So the watered down config is:

vpdn-group 1                                                         
 accept-dialin                                                       
  protocol l2tp                                                      
  virtual-template 1                                                 
  ...
vpdn-group 2
 accept-dialin                                                       
  protocol l2tp                                                      
  virtual-template 1                                                 
  ...
...

interface Virtual-Template1                                          
 ip unnumbered Loopback0 
 ip access-group cust-in in
 ip wccp 97 redirect in                                              
 ...


What I need to do is to be able to selectively use 'ip wccp 97 redirect in' by 
RADIUS attribute but I can't seem to find the right (any) RADIUS attributes.

I think there may be two ways of doing it but I don't know if any / either are 
possible:

1) have RADIUS specify a 'virtual-template 2' rather than 1 dynamically where 
I don't have the 'ip wccp 97 redirect in' statement;

2) have RADIUS specify an attribute that can add the 'ip wccp 97 redirect in' 
statement dynamically.

Any help / advice would be much appreciated.

Kind regards,
Barry O'Donovan

http://www.opensolutions.ie/