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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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7 Comments
 
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harbor235 earned 1500 total points
ID: 40614133
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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Author Comment

by:eemoon
ID: 40614452
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
harbor235 earned 1500 total points
ID: 40614466
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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Author Comment

by:eemoon
ID: 40614481
So can you confirm BGP IPv4 is not IPv4 ?
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LVL 32

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by:harbor235
harbor235 earned 1500 total points
ID: 40614573
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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Author Comment

by:eemoon
ID: 40614631
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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LVL 32

Assisted Solution

by:harbor235
harbor235 earned 1500 total points
ID: 40616462
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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