I have a probelm on hand, can someone here advise.
Am designing a medium size MPLS network. And the MPLS service is spread in different regions.Now this SP doesnt own a MPLS backbone. So need a Transit MPLS service provider. Now the question is what is the best method of recommending a solution. Whther Inter-AS transit service method or CSC method.
SPA - PoP1 <=====>Transit MPLS<====> SPA - POP2
This transit MPLS should be via CSC or inter=AS method.
can someone help me with the pros and cons for each method.
you have a few other issues as well. What IGP are you running? Hope its OSPF as ISIS is a no no in a vrf (apparently it is there but i still havent seen code that supports it). Also on the multicast front - MVPN within a CSC environment is fine - i tested that a good few years ago and works absolutely no problems.
Remember that with CSC the routing table that the SP takes is your IGP, that is it the SP has no knowledge of the thousands of vrfs. ALSO some SPs will not do such an interface due to the inability to hide their core hops (the no mpls ip propogate-ttl command has no affect in CSC envronment - this is being sorted tho).
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