Re: Redistributing iBGP vs. eBGP Routes into EIGRP

From: mgrenham@eircom.net
Date: Tue Jan 25 2005 - 03:05:06 GMT-3


"Howard C. Berkowitz" <hcb@gettcomm.com> wrote:

Howard,

Have a look at http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/iprrp_r/ip2_a1g.htm#wp1040739

IBGP is not redistributed from a routing protocol by default.

Ollie.

<
< At 7:21 PM -0800 1/23/05, Ted McDermott wrote:
< >I have EIGRP and BGP running in the same router. When
< >I redistribute from BGP into EIGRP, it appears that I
< >cannot successfully redistribute an iBGP route and
< >send it on to another EIGRP router. I am thinking that
< >this is because the iBGP route has an administrative
< >distance of 200, which is greater than 170, which is
< >what EIGRP would use as the external route's A.D.
< >However, if I pick up the same route through eBGP,
< >EIGRP will redistribute it, since eBGP's A.D. is 20,
< >which is less than 170. Does this make sense, or is
< >there another reason why I am not seeing the iBGP
< >route redistributed into EIGRP? If this is what is
< >happening, is there a way to force EIGRP to accept and
< >redistribute the iBGP-sourced route?
< >
<
< When you do a show ip route, what AD is shown or, if you will, what
< is the source of the route installed in the routing table?
<
< It's always worth remembering that redistribution does _not_ occur
< directly between routing protocols. It takes place between the
< routing table and the protocol doing the redistribution.
<
< When you say "redistribute foo" under a routing process, you are
< really saying "import all routes of source foo that are currently in
< the routing table."
<
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