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Can a bgp UPDATE message carry more than a single prefix ? I have read a lot of text about this ( Halabi, Doyle, RFC 1771 ) but I think the wording that this literature is never clear to me about what they are exactly saying.below is a quote from RFC...
I am trying to understand why I would need import/export route-targets in a CE configured for Multi-Vrf. Since the CE will have connections ( physical or logical ) to an attached PE, the VRF association on the CE should be enough by connection alone....
If I am configuring my PEs to support shamlinks for CEs that have a non mpls redundant connection to each other, do I have to have a connection on the PE in the same OSPF area as the one I am creating the sham link for ?In other words, if the CEs hav...
I have always understood that a BGP speaker will check the AS_PATH of the incoming update. If it detects its own AS number in the Update, it detects a possible loop and does not accept that update.I am reading today the " CCIE Routing and Switching O...
Could someone explain to me about the BGP allow-as in configuration as it relates to MPLS VPN ? why do I need it, when do I need it ? It would help to explain in parrallel with as-overide, as I get mixed between the application of the two.ThanksHerbe...
Hi,I could not open your attachment, I think it has expired. However, it would be a violation of BGP Operation for a BGP speaker to advertise to neighbors any routes that it did not itself consider as best. Thats how BGP operates. If your BGP speaker...
Hi Harold,Thanks for your response. The wording in the new RFC is certainly different and a lot clearer. Thanks for the link.This new RFC clearly states " Routes are advertised between BGP speakers in UPDATE messages. Multiple routes that have the ...
Hello Martin,Again, thanks for your reply.Below another quote from RFC 1771" This variable length field contains a list of IP address prefixes. "and here is another " Reachability information is encoded as one or more 2-tuples of the form .....".Dont...
Hello Martin,I think you just succeeded in confusing me further ? Am I being rediculous ? I hope not. I thought the whole point of creating VRFs is to isolate routes ? If on the same device (PE or CE ) I want to share routes between VRFs, wouldn't on...
As you dont specify DLCIs when configuring VRFs, the question of using the same dlci numbers in different VRFs boils down to whether you can actually receive the same dlci number on different interfaces. DLCIs are per interface resources and indeed o...
