Hi,
It doesn't really matter which IGP you use for basic MPLS, as long as
you have an IGP which LDP can use for detecting the correct prefixes
and assign a label. When using Traffic Engineering it's required to
have a Link State protocol and you definitely want IS-IS, it's way
more scalable in a single area than OSPF, which is the preferred way
of doing TE as you have the entire overview of the network.
It's possible to do inter-area TE, but that's not really advisable as
you give a little bit of control out of your hands by delegating it to
the ABR's.
But you are right that IS-IS is the preferred protocol to use in big
SP networks :-)
--
Regards,
Rick Mur
CCIE2 #21946 (R&S / Service Provider)
Sr. Support Engineer – IPexpert, Inc.
URL: http://www.IPexpert.com
On 10 okt 2009, at 02:14, Jean-Marie Ngok wrote:
I think the best IGP for MPLS backbone is IS-IS because it can
support more devices per area than OSPF. BGP is good but we can make
confusion when deploy BGP and MP-BGP. For less errors and more
security it's better to use IS-IS.
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_______________________________________________
For more information regarding industry leading CCIE Lab training, please visit
www.ipexpert.com
