From: Peter McCreesh (petermccreesh@gmail.com)
Date: Thu Jan 19 2006 - 05:14:12 GMT-3
I would say that if it is a protocol that changes its ports dynamically from
the well known standard ones (ftp for eg) match protocol would be the best
option here as the ACL would not be good enough.
Also, by using ACLs, you would possibly have to keep updating them if
subnets were added/removed.
With something like RTP a mix of both would probably be best.
If you run auto QoS on a 3550 for Voip (auto qos voip) , you will see the
resulting config matches protocol RTP along with matching ACL entries with
the ports.
Just my opinion though.
Regards,
Pete
On 1/19/06, Quetta Walla <quetta_1@lycos.com> wrote:
>
> Hey,
>
> When dealing with mqc, what is the preffered method of mathcing some
> protocol.
> For example:
> ip cef
> map-class match-all RTP
> match protocol rtp
> !
> or should we first create an acl matching udp ports used by rtp and then
> match that acl under the class-map.
>
> I think in the lab exam, they should say, do not use ip cef to accomplish
> this or do not use acl to direct us in one direction or the other.
>
> But from the experience of people on the production networks, which way
> should be preferred?
>
> Thanks
>
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