EIGRP SOO

Hi All

I am reading MPLS fundamentals (Page 225) and I have following query :

They have shown that SOO is added on PE router (PE-CE link) and on
backdoor interface.
My question is ; does this SOO attribute gets added to incoming as
well as outgoing EIGRP routes on that interface ?

i.e. if my f0/0 has soo 1:100 .... does that mean all EIGRP routes
going out f0/0 will be tagged with soo = 1:100 and if any routes are
coming IN f0/0 with soo = 1:100 ; these will be dropped ?

If possible ; can someone please explain the flow of how routing loop
is avoided in example given in book ?

Many thanks in advance
Gaurav Madan

PS : I have also read the link
 http://wiki.nil.com/Multihomed_MPLS_VPN_sites_running_EIGRP

It states : The Site-of-Origin is an extended BGP community attached
to routes redistributed into MP-BGP from a PE-CE routing protocol. The
routes marked with a SoO are not advertised over PE-CE interfaces
having the same SoO,

In the example given in MPLS fundamental book ; we are not applying
this SOO to routes going in MP-BGP . We are applying it on non-core
path itself . Can someone please explain .

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Received on Wed Feb 09 2011 - 19:43:34 ART