[c-nsp] QoS and VLAN

[Steve McCrory]

Have you tried implementing Modular QoS CLI (MQC) using service
policies?

I haven't worked on the 7500 platform but we have successfully applied
QoS for VoIP on subinterfaces on the 7200 series routers.

It should be noted that on sub-interfaces, you need a parent service
policy to shape traffic to a particular level and then a child service
policy which will carry out the actual QoS markings/prioritizations
within the shaped allowance. 

Steven
 
Steven McCrory
 
Senior Network Engineer
 
Netservices PLC
Waters Edge Business Park
Modwen Road
Manchester, M5 3EZ
 
www.netservicesplc.com
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jay Nakamura
Sent: 29 April 2009 16:36
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] QoS and VLAN

We have several customers coming in on Ethernet.  They are connected
to L2 switch and trunked into a 7500 router via VLAN.  This has worked
fine so far with the use of rate-limit on the sub-interface.  Most
customers have 5~10mbps.

However, we are increasingly needing QoS so VoIP traffic does not drop
when data traffic bursts.  Only work around I know how to do is to
give separate rate-limit based on IP address since most of the time
VoIP has separate gateway on the customer side than the data firewall.

Classification of the traffic is not a problem.  The issue is, how do
you give VoIP traffic priority over data traffic on a Ethernet
sub-interface?

Is there a good way to implement this on a 7500?  If not, what Cisco
hardware will work?  We are on a tight budget and the number of
clients are small.  (dozen or so)  Would going with L3 switch be
better?  If so, what model?

Thanks!
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NetServices plc, Company No. 4178393,
Registered Office: NetServices House, 31 Modwen Road,
Waters Edge Business Park, SALFORD, M5 3EZ
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