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LLQ on Virtual-Acces Interfaces

I'm sure this must have been asked before but...

Given service policies with CBWFQ and LLQ aren't allowed on virtual-access interfaces how can a service provider guarantee bandwidth and latency to VoIP or other priority traffic over a single PPP session?

I'm looking at this from the point of view of a broadband service provider using L2TP to tunnel customer PPP sessions to the terminating router so there isn't an individual interface for each customer except the for the virtual-access interface.

I've looked at ppp multilink but I don't see how that can be used in an environment where each customer can only initiate one PPP session?

I'm assuming the only way to go is to use the

"ip rtp priority" command on the virtual-template.

Any ideas on where to look?

Is CBWFQ likely to make it into the whole VPDN system or is it just too resource hungry?

Richard Watson


Re: LLQ on Virtual-Acces Interfaces

You can just add 'ip rtp priority' command to the virtual-template. But anyway you will have to shutdown interface and clear virtual-access interface to make it work. Here's the nice description of the command.