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multihoming BGP routing information

Posted on 2013-11-27
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Last Modified: 2013-11-29
I'm relatively new in BGP, I'm trying to set up 2 Cisco 7204 with 2 ISP in BGP.

I was planning to do HSRP on both, and set both as EBGP with ISP's and IBGP between them. I want both link to be active and let BGP decide best path.

My question is,
when I request "Full route" from an ISP, does this mean it will include all possible IP address available on IPV4 ? I so, do I even need a default getaway ?
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Question by:Sheldon1
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giltjr earned 2000 total points
ID: 39682639
You get the current full routing table.  It will include all public IPV4 address, not individually though.  As of right now there over 400,000 entries.

However, how much memory do you have in your routers?
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by:Sheldon1
ID: 39683612
Both have 1 Gig,  both will have 2 BGP session, one eBGP and one iBGP.

Also, do I  need  always-compare-med and/or  deterministic-med
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by:giltjr
giltjr earned 2000 total points
ID: 39683724
I had to do some reading on those.   I don't think you can use both at the same time.  They seem to do the same thing different ways.

You can also read http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094925.shtml to comprere "always-compare-med" to  "deterministic-med"


According to this write up:

http://blog.ine.com/2011/10/12/understanding-bgp-med-and-bgp-deterministic-med/

"always-compare-med" is normally not used in the "real world unless MED policies are standardized between neighboring ASes."  You can search on "real world" to find this quote.
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