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question about mpls rate-limit

I want to know how MPLS do rate-limit work,such as,10Mbps access for customer's 2 sites,how MPLS can guarantee 8Mbps speed between the 2 sites?

I wait for your suggestion,thanks!


Re: question about mpls rate-limit

Are you looking at MPLS Rate-limit matching EXP etc, then you can do MPLS rate-limit matching EXP and applying rate-limit(CAR) on each of the links. Or you can use the diffserv model , match EXP and set the queuing on the links or you can look at TE Tunnels for Admission control as well. Not sure how close iam to ur answer.

Re: question about mpls rate-limit


limiting customer traffic between two sites is something different than guaranteing 8 Mbps site to site.

Rate-limiting can be done with a policer or a shaper. So you could configure a 10 Mbps shaper outgoing on a CE or a 10 Mbps policer incoming on a PE.

The far simpler solution is to provide a 10 Mbps access line (Ethernet!?).

To give hard guarantees on site to site customer traffic in an MPLS network you do either overprovision your backbone (throw bandwidth at the problem) or do MPLS DiffServ aware traffic engineering with a sub-pool set to 10Mbps.

MPLS TE is however a rather complex solution to the problem and needs some thought whether it can be justified. Finally a customer should be willing to pay for the SLA approx. what the service providers cost are. This is not straight forward true with MPLS TE, the SP should create a business case.

Hope this helps


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