EoMPLS CE configuration basic question

[msun]

My company is going to switch to MPLS as our WAN service provider. It is pure L2 technology according to the provider and the handoff will be Giga fiber Ethernet. But I don’t need transport VTP, CDP and STP between sites.

So I don’t think that there is a need of trunk port to tunnel port and q-in-q configuration. Right?

I plan to plug the link into L3 switches on both ends and configure IP address on L3 just like a point-to-point link. Do you think this whould work? Is there any MPLS related configuration required for this scenario? Do I miss anything?

Thanks

[sultan-shaikh]

Hi Ming,

Your assumption is absolutely correct, you don't need to configure anything special, just consider the Service Provider network as one big Ethernet cable... You can configure your end points as if they are connected end to end...

Let us know if this helps...

sultan

[msun]

Thank you Sultan.

I image that route-map, ACL etc configuration on L3 wouldn't be a problem. Would QoS related DSCP bit settings be reserved when traffic passing through the MPLS backborn?

Ming

[sultan-shaikh]

Hello Ming,

Regarding DSCP bit preservation across the MPLS backbone, well, you have the choice of either remarking it by the Service Provider or let it be carried "as it is", it all depends as to what you want.

Infact NOT honoring the cusotmer QoS is more beneficial to the Service Provider in some cases, imagine if the SP honors your QoS... you can buy a "Standard" service and mark the packets with "priority" bits and avail of "Premium" service... so many SPs don't usually honor customer QoS, be it IEEE 802.1p, IP ToS/DSCP or MPLS EXP...

So answering your question clearly, Yes QoS markings would be preserved...

Let us know if this helped...

Sultan