MPLS configuration

Unanswered Question
Feb 17th, 2009

Hi pros,

I need to implement mpls for the isp here.

They bought some cat 6500 switches and cat 4500 switches.

Pls give the initial setps to enable mpls


I have this problem too.
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guruprasadr Wed, 02/18/2009 - 01:25

HI Swami,

Please share the Target Plan that you wanted to implement.


Guru Prasad R

shivlu jain Wed, 02/18/2009 - 01:29

you can use the mpls ip and mpls label protocol ldp.

Every interface should be mpls ip and mpls label protocol ldp enabled


shivlu jain

Giuseppe Larosa Thu, 02/19/2009 - 08:42

Hello Swami,

this can be your reference

you need to use a classless routing protocol (OSPF or IS-IS to be preferred over EIGRP for possible MPLS TE future applications).

you need to advertise in the IGP the loopbacks addresses used to talk LDP over the MPLS enabled links.

MPLS needs to be enabled on all core facing links with

mpls ip

Take care of MTU issues: MPLS increase the size of frames and this needs to be handled on routers, multilayer switches and also on L2 only switches on the path.

for MPLS L3 VPN applications you will need also Multiprotocol BGP

Hope to help



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