We are running a few 7206VXR's where one of the interfaces is ATM (PA-A3) and the other is Gig Ethernet to our core. On the ATM we have several subinterfaces to customers. On the ethernet network, we use COS to mark frames with a p-bit and all is good. I'd like to prioritize frames coming in on the ethernet interface, going out on the ATM subinterface. So, if i get a frame with a p-bit value 5, it gets priority on the output side on the ATM subinterface.
All subinterfaces are configured like this:
interface ATM1/0.1641 point-to-point
description PPPoA customer #1
no ip redirects
no ip proxy-arp
vbr-nrt 4096 4096
encapsulation aal5mux ppp Virtual-Template1
So practically, i don't want to reserve bandwidth, but just prioritize the frames over regular traffic.
You can use
I remember there was something like match layer-2 prececende, but I don'ìt have the details.