cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

Community Helping Community

1125
Views
0
Helpful
3
Replies

Role of IGP in MPLS

Hi,

Need to know role of IGP in MPLS. If I have BGP (fully mesh), what is the use of IGP in MPLS?

Thank You

Everyone's tags (1)
3 REPLIES 3
Hall of Fame Guru

Usually within the core of

Within the core of the MPLS network the P routers don't run BGP.

In fact that is one of the big advantages from an SP perspective.

So an IGP is run between the PE router's MPLS enabled interfaces and the P routers so that labels can be exchanged which ensure full reachability within the MPLS network.

Jon

Highlighted

Thank You Jon....

Thank You Jon.... What I want to exactly ask is, Is it technically possible to achieve MPLS connectivity without IGP? Correct me if I am wrong or missing something.

 

Beginner

Hi, It will be difficult to

Hi,

 

It will be difficult to have fully mesh BGP between PE routers in MPLS network. A single pop itself may have 2 or more PE routers and just for forming neighborship it will be difficult spare interfaces.

 

P routers in MPLS make things easier and will have NLRI informations to any PE routers.

To make things more easier you can also use RR which can be at certain locations and through P routers you can have the Reachbility easily.

HTH

 

Yogesh.

CreatePlease to create content
Content for Community-Ad
FusionCharts will render here