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Who  can confirm a concept of MPLS for me ?

Posted on 2015-02-16
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Last Modified: 2015-02-24
Dear All

I am not sure of a concept of MPLS regarding the difference between BGP IPv4 and BGP VPNv4. I am going to tell it below. If I am wrong, please correct me. Thank you.

I think the BGP IPv4 here means a regular BGP IPv4 address system, like IGP ip address system, while BGP VPNv4 is a special address family, which is BGP IPv4 address plus RD(router extinguisher) and is able to handle unique address between PE routers.
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Question by:eemoon
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harbor235 earned 500 total points
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The real difference is BGP IPV4 has no mechanism to receive routes from different peers that have unique
VRF/RD/RT definitions and ensuring that they are imported into the correct routing table. BGP VPNV4 has enhancements that allow this to happen seamlessly.

Otherwise how would routes from a particular peer get into the routing table of a remote peer associated with the VRF/RD/RT definition?  You see?  BGP VPNV4 accomplishes this.



harbor235 ;}
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by:eemoon
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Thank you for your fast reply. I noticed the term- "BGP IPv4" when I read a document on MPLS. Can I say "BGP IPv4"  is IPv4 as we see in RIP, OSPF, EIGRP etc ?
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by:harbor235
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Traditional BGP is just BGP and the enhanced BGP is called MP-BGP - Multi-Protocol BGP

Is that what you mean?

http://www.cisco.com/c/en/us/tech/ip/multiprotocol-bgp-mbgp/index.html

harbor235 ;|
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by:eemoon
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So can you confirm BGP IPv4 is not IPv4 ?
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by:harbor235
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There is no BGP IPV4 per se, BGP supports IPV4, MPBGP supports the other address families including VPNV4 and VPNV6. Make sense?

There is traditional BGP and enhanced BGP


harbor235 ;}
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by:eemoon
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I think you are right, and i think BGP IPv4 should not be a normal term. In fact, BGP IPv4 is IPv4 per se.  That engineer mentioned what is difference between BGP IPv4 and BGP VPNv4. It should be mentioned like this: what is difference between IPv4 and BGP VPNv4. Do you agree ?
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by:harbor235
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Not sure, IPV4 is the underlying protocol that transports BGP and MPBGP. I would say the question is what is the difference between BGP and MPBGP. BGP VPNV4 is a feature of MPBGP.


harbor235 ;}
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