Qos Solution for 10mb Point to point L2 WAN link

[siddiqirf]

Hi All

Hope you guys can assist, as I am strugging to get a working solution for the below...

Scenario: (Diagram attached)

We have a MWR2941 (running 12.4(20)MR) router on site A and one in site B which will be connected over a Service provider L2VPN Ethernet over MPLS (EoMPLS) Network, with 10Mb Bandwidth allocated by the ISP. I have simulated this in the lab by directly connecting the two MWR's back-to-back via the Gig0/0 interface with configurable bandwidth of 10Mb on the Trunk interface.

The E1 TDM pseudowire end to end is working fine, with PTP configured for E1 timing/clocking. In addition I have a 2960-24PC-L switch connected on G0/2 of the MWR (on each end) configured with dot1q trunking. The switch will be used to connect two user groups in two seperate vlans (VlanA and vlanb) and transported across the same 10MB wan Link.

Below are the requirements

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

3) Classify and mark vlan A traffic coming from the 2960 Switch Trunk port (Connected to G0/2 on MWR) and give it bandwidth reservation over the WAN Link of 2MB

4) Classify and mark vlan B traffic coming from the 2960 Switch Trunk port (Connected to G0/2 on MWR) and give it bandwidth reservation over the WAN Link of 2MB

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.

Based on my requirements please can you advise on how to configure the MWR and have a workable QOS solution.

[Marwan ALshawi]

Hi

see bellow answers:

1- try to use a calss map that uses ( match input interface ) followed by the E1 interface number then give it priority and set DSCP to a value that you can match it on the other end of your network

as long as you are using Hqos with shaping the parant policy to 10M remove this command from the interface ( bandwidth 10000 )

2- you can use ACL to match base don source/destination IP and port numbers then match this ACL in the class map

3- and 4 - what you can do in the L2 switch on each port beloing to each of the vlans above assign  it ( mark it ) with DSCP vlau thay you can match it in you router using the switchport commands:

mls qos enable

or only mls qos

interface level command:

set DSCP ( give it a value to mach for example for ports in vlan A give it value as 26 and vlan b port 34 )

on the router in the clas smap match each of these vlause in diffrent class map and give it the requried value

other option is ti use ACL per Vlan subnet that match the source as the vlan subnet/network distination any then match it in a class-map as well

HTH

if helfpul rate

[alex.jeon]

Hi siddiqirf,

I'm currnetly on same challenge to provide QoS for P2P L2 interface.

Did you find out the solution for your case?

Would you mind sharing the working config?

Cheers,

Alex.