[c-nsp] R: Shapping NTP traffic on 6500/7600

[Brian Turnbow]

Hi

<snip>
> >
> >I don't know if you've the ability to match on packet size or not in
> >hardware for QoS - if so, UDP/123 packets which *aren't* 76 bytes in
> >length is a good classifier, as it leaves timesync ntp traffic alone
> >and squelches everything else.
> 
> I admit I didn¹t check the 7600 platform, but the 6500 doesn¹t seem to
> support it. I can create the config, but when I apply it to the interface it says
> that the interface doesn¹t support matching on length :(

On 6500 acl length matching is only supported in software so it is not supported...
At least  on lan cards and up to pfc3 , I'm not sure if ES cards or sup2-t can do it.

There is more info here on it

http://www.cisco.com/en/US/products/hw/switches/ps708/products_white_paper09186a00800c9470.shtml



Brian

> 
> Thanks!
> 
> >
> >-----------------------------------------------------------------------
> >Roland Dobbins <rdobbins at arbor.net> //
> <http://www.arbornetworks.com>
> >
> >	  Luck is the residue of opportunity and design.
> >
> >		       -- John Milton
> >
> >
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