[c-nsp] Policing individual vlans per port on 3750 (non metro)

Stig Johansen stig.johansen at ementor.no
Mon Jul 28 04:21:17 EDT 2008


Hi there,

Just remember that the 3750 non-metro platform has several limitations,
especially for egress QoS, which I would think you would be interested
in using.

The short story is: The 3750-platform does only queueing and scheduling
on egress-interfaces. Any policing or prioritization you want to be be
done on a egress-interface would have to be done by manipulating
CoS/DSCP-values and configuring the output-queues accordingly.

For inbound QoS in your case, you'll have to enable VLAN-based QoS as
suggested by Arie. Follow this link:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/relea
se/12.2_44_se/configuration/guide/swqos.html#wp1703591

Best regards,
Stig Meireles Johansen

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jose
Sent: 26. juli 2008 15:00
To: Cisco
Subject: [c-nsp] Policing individual vlans per port on 3750 (non metro)

Hi everyone.  Ran into a little snag this afternoon when I needed to 
police layer 2 customers on a single port in a similar fashion to the 
way we do it on the 3550-24s.  Normally we would we create the aggregate

policer, use a class map that matches on vlan id and another one that 
matches any ip per customer...we combine these under a single policy-map

and apply it to the interface.


When trying this similar process on the 3750, we noticed that we aren't 
able to match on vlan:

copsw01(config)#class-map match-all ARPI3-IP-Trunk

copsw01(config-cmap)#match ?

 access-group     Access group

 input-interface  Select one or more input interfaces to match

 ip               IP specific values


So now we're left wondering how can we have a trunk port police 
invididual vlans if the option is not there to choose?  BTW, the version

of IOS we're using is c3750-ipbasek9-mz.122-25.SEE2.

Thanks.

Jose
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