SOO is an community attribute used to prevent loops. From an SP perspective it is difficult to manage in a large scale environment as the CVs need to be synchronised on the PE and CE sides. Of course you could do this all on the CE sides by using wel...
These are actually two different models.. Inter-AS according to the option used might not solve your problem. If you use option B ( Change NH at ASBR ) then certain things will not work i.e Multicast, latency based network not preserved ( Could use M...