[c-nsp] 3750 with IP-BASE, QoS

Mack McBride mack.mcbride at viawest.com
Thu Dec 8 14:24:43 EST 2011

On the 3750 you would use a police statement with rate, burst, exceeds and violates.
The rate would be your various bandwidths.
The burst would be calculated from the rate.
It sounds like you only want to push these into queues, so you mark your CoS on input
using the police statements.  Then the queue sizes would be set on the various ports.

LR Mack McBride
Network Architect

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Joe Freeman
Sent: Thursday, December 08, 2011 12:02 PM
To: Cisco-nsp
Subject: [c-nsp] 3750 with IP-BASE, QoS

I've inherited a site that's a mix of a 3750 stack and Force 10 gear.
the 3750 stack is where the layer 3 is happening between vlans in that site. I have a need to implement QoS for some voice traffic.

Since the 3750 doesn't do QoS the way the routers do, I'm sort of at a standstill..

ip access-list extended AgentVoice1
permit tcp XX.XX.XX.0 eq 80 permit tcp XX.XX.XX.0 eq 443 permit tcp XX.XX.XX.0 eq 8081 permit tcp XX.XX.XX.0 eq 8843 permit tcp XX.XX.XX.0 eq 8880 permit tcp XX.XX.XX.0 range 2200 2300 permit udp XX.XX.XX.0 range 1024 65535 permit udp XX.XX.XX.0 range 5060 5063 permit udp XX.XX.XX.0 range 8000 8007

ip access-list ext AgentAppsList
permit ip host permit ip XX.XX.XX.230 permit ip host permit ip XX.XX.XX.230

ip access-list ext AgentVoice2
permit ip permit ip permit ip permit ip

class-map match-all Voice1
descr All voice traffic for agent group 1 match access-group name AgentVoice1

class-map match-all AgentApps
descr Agent application traffic to/from Agent Applications match access-group name AgentAppsList

class-map match-all Agent_Voice_other
descr Agent group2 voice traffic
match access-group name Agent_Voice2

policy-map Basic_QoS
class Voice1
! should be set to guarantee 32Mbps, low latency, priority queuing class AgentApps ! should be set to guarantee 8M, normal queuing (mostly http and rdp traffic) class Agent_Voice_other ! should be set to guarantee 12M, low latency, priority queuing class class-default ! gets whatever is leftover/available

So, the question is... how do I map that into a qos config that works
(well) on the 3750?
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