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Cisco 1721 Router Multi-Link Configuration and QOS How-To

I have just got a project where the client wants to Bundle up two links (Leased Line And DSL)links and then wants to Do QOS management (wants Higher Priority for Voice Traffic) and wants some ip to be restricted to certain link (leased Line or DSL)

Please can anybody advise me as how to go about this implementation.It would be great help if someone could direct me to some Links.




Re: Cisco 1721 Router Multi-Link Configuration and QOS How-To


if you are going to bundle them up using MLPP and need the config directions i would go thru these links.

for voice with high priority use LLQ.

If possible and reqd its advisable to keep LFI and RTP,TCP header compression in place ..

for the kinda restriction u expect here u need to go for PBR (policy based routing) where in u can match the ip address using the ACLs and force them to use any of the particular link or force them to use any of next hope destination..

do find the link which can help u out to know more on PBR...


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Re: Cisco 1721 Router Multi-Link Configuration and QOS How-To

I believe that you can not do both combine the two links in multilink and force certain types of traffic over a particular link. If you use multilink you combine the two physical links into one logical interface and lose the ability to use the links individually.

So a decision needs to be made about which is more important: to join the links in multilink or to be able to restrict certain types of traffic to a particular link. It would be necessary to know more about the network and what the real requirements are to make that decision properly. Without knowing the specifics I wonder if it would not be better to keep the links separate and use PBR.



Re: Cisco 1721 Router Multi-Link Configuration and QOS How-To


As well said/pointed out by Rick u cant make use of PBR with a single pipe..(i missed to mention in my earlier post)..

If u planning to use them as induvidual links then you can think off using PBR.

But again it all depends on the decision on whether to go for a multlink or keep them as its which matters a lot here..