Cisco WAN :: MWR2941 - Enforcing QoS On Pseudo Wire Packets
May 20, 2011
I have a question regarding enforcing a QoS on Pseudo wire packets coming from a T1/CEM interface on an MWR2941. I have the TDM pseudo wire working great testing in a lab with two T1 test sets. The problem is prioritizing the T1 traffic so that on small WAN connections the T1 traffic is not dropped because of other low priority IP traffic. Currently I have tried applying policy maps to both the input CEM and output gig Ethernet interfaces. However, I am having trouble matching anything on the CEM input. I don't know if it is even possible to match packets on a CEM interface but that is the only point I can think of to put those packets in a qos-group.
Attached is an example of the config.
class-map match-any cem Traffic match mp ls experimental topmost 3 match any!
policy-map INPUT-POLICY class cem Traffic set qos-group 5 set dscp ef!
!interface CEM0/1 no ip address cem 0 xconnect 10.10.10.1 301 pw-class MPLS_EXP3 ! service-policy input INPUT-POLICY!
[Code] .......
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1) Classify and mark Psuedowire packets E1-DATA coming from a E1/CEM interface and give it priority treatment over the WAN Link with reserved bandwidth of at least 4MB
2) Classify and mark Signalling/Timing PTP packets coming from PTP Vlan and give it strict bandwidth reservation over the WAN Link of 1MB
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It is important that the E1 Traffic and the Signalling/Timing PTP packets are given priority and strict reservation so that it is not dropped in times of congestion. At the same time Vlan A and Vlan B need bandwidth reservation to give them their guaranteed bandwidth.
Currently I have tried applying policy map to the CEM interface. However, I am having trouble matching anything on the CEM input. Also I am having trouble applying a service-policy outbound on the gig0/0 (WAN Link). Also I can’t apply a service-policy inbound on the Gig0/2 interface with match statement. I have tried configuring input policy map to classify and mark PTP traffic (Vlan 902), but the MWR does not also allow me to attach a service-policy to the vlan interface. how to configure the MWR and have a workable QOS solution.
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[code]...
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