I am desging QOS policies for a big network with ISIS as IGP and it has MPLS VPN servcies running. The QOS will use MPLS EXP bits as its classification method for queing/prioritizing/scheduling. Diff Serve Tunnel enabled. But I need to reserve some bandiwtdh for ISIS ( non IP protocol) in case of congestion. How to go ahead with ISIS prioritization.
As per Cisco doc, router prioriizes ISIS packet processing by pak_priority but what abt queuing/scheduling ?