[c-nsp] Egress shaping/policing for bandwidth control on a 3750-ME

[Alex Moya]

Try policing the port

Sent from my iPhone

On Mar 9, 2009, at 7:59 PM, "Brad Henshaw" <brad.henshaw at qcn.com.au>  
wrote:

> Frank Bulk - iName.com wrote:
>
>> I have two Cisco 3750-ME (Metro) where we are trying to apply
>> an 8 Mbps bandwidth limit to it.
>> We tried HQM shaping but got a lovely message that "Hierarchical
>> service-policies are only supported on ES interfaces".
>
> Frank,
>
> The 3750ME can only do per-VLAN shaping on the ES ports.
>
> You can shape standard ports (but not per-VLAN) in increments of 10%  
> of
> the port speed using the 'srr-queue bandwidth limit' command. To  
> achieve
> 8Mbps with this you'd need to lock the [FastEthernet] port to 10Mbps  
> and
> set the limit to 80%. Buffering of packets is less than ideal.
>
> The 3750ME supports hierarchical dual-level *ingress* policies on  
> SVIs.
> To use these you need to set 'mls qos vlan-based' on the port and may
> or may not need to use a 'match input-interface' statement in the  
> class
> of a subpolicy. (I've never used these so can't comment with  
> authority)
>
> I'd provide an example but I'd just be ripping it from page 35-71 of
> the 3750 Metro 12.2(46)SE Software Configuration Guide ;-)
>
> I'm pretty sure neither SVIs nor standard ports support output  
> policies
> so you'd best do as much as you can on the ES ports on ingress from  
> your
> core.
>
> Note that ingress service policies on 12.2(44)SE1 seem to be broken -
> This may also affect other versions. We never logged a bug because  
> it's
> fixed in 12.2(46)SE.
>
> Overall I think the quality control on IOS releases for the 3750ME
> leaves a BLOODY LOT to be desired.
>
> Regards,
> Brad
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