Re: OSPF or BGP for I-MPLS Connectivity

Hi Vignesh,

Are you saying that the CE-PE routing protocol is BGP or OSPF using native
IPv4 over the service providers MPLS infrastructure?

There's nothing specifically bad with using BGP if that's the only option
your particular SP is going to offer you (and it makes a fairly good
demarcation protocol for stuff inside your direct control and stuff outside
of it), however if you really must have OSPF between all of your sites and
they don't support it I suppose you could see if the SP offers a L2 service
(either a point to point pseudowire or VPLS if it's multi-point) and manage
the L3 yourself (or look at horrible messes like building tunnels over the
SP infrastructure to run OSPF but that may introduce payload MTU problems
and still have BGP in the mix anyway..)

An influence as to which path you go down may also depend on what the
operations teams are most comfortable with and how much process
change/training may be required if you start to change what may be a
standard method of procedure...

Cheers,
Adam

On Thu, Jan 5, 2012 at 7:40 PM, vignesh sethuraman <sethuvignesh_at_yahoo.co.in
> wrote:

> Hi Experts,
>
> I have real time scenario, in which we are running OSPF for
> Inter-office connecitivity across locations inside the country and we are
> opting for I-MPLS connectivity to connect international office.
>
> Service
> Provider recommends us to go for MPLS over BGP instead of MPLS over OSPF.
> The
> reason for this is due to backdoor links and the complexity with
> Sham-links.
>
> Please let me know your opinion on whether to go for MPLS over BGP or MPLS
> over OSPF.
>
> Regards,
> Vignesh
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Thu Jan 05 2012 - 23:29:36 ART