From: Bhisham Bajaj (bhishambajaj@xxxxxxxxx)
Date: Fri May 31 2002 - 23:29:03 GMT-3
hi
R1(config-router)#bgp redistribute-internal ?
you can use this command to get the IBGP routes
redistributed into IGP but it is not a very good thing
as it can coz a routing loop
HTH
BB
--- Joe Jia <ellenjjl@rogers.com> wrote:
> David,
>
> Thanks for your summary.
>
> But I just want to say that if you want to
> redistribute the iBGP route into
> OSPF, ospf will not put this route into its
> database, it will only accept
> the EBGP routes.
> I mean in Tony's example, for the 80 network, the
> command "redistribute bgp
> 2 metric 1592 subnets" will not work, because it is
> an iBGP route.
>
> Joe
>
>
> ----- Original Message -----
> From: "David Ham" <ccieau@hotmail.com>
> To: <ellenjjl@rogers.com>; <tron@huapi.ba.ar>
> Cc: <trussell@ibeam.com>; <ccielab@groupstudy.com>
> Sent: Friday, May 31, 2002 9:28 PM
> Subject: Re: BGP into ospf
>
>
> > Joe,
> > Here is my understanding of IBGP into IGP.
> >
> > Yes. You are right. it is no good to redistribute
> IBGP into IGP in real
> > network. As huge number of networks belong BGP
> will redistribute into IGP.
> > Your customer will be very upset if they see all
> the routes the world
> have.
> > :) There are two ways you can do with other than
> using IBGP/IGP
> > redistribution.
> > 1. set up fully meshed IBGP with "no syn'. -- no
> pratical if you need to
> > setup large number of IBGP.
> > 2. set up a default route for IGP networks for
> outside ( BGP world ).
> >
> > Hope this help.
> >
> > David Ham
> > OPTUS
> >
> >
> > >From: "Joe Jia" <ellenjjl@rogers.com>
> > >Reply-To: "Joe Jia" <ellenjjl@rogers.com>
> > >To: "Carlos G Mendioroz" <tron@huapi.ba.ar>,
> "David Ham"
> > ><ccieau@hotmail.com>
> > >CC: <trussell@ibeam.com>,
> <ccielab@groupstudy.com>
> > >Subject: Re: BGP into ospf
> > >Date: Sun, 2 Jun 2002 20:35:01 -0400
> > >
> > >Hi,
> > >
> > >As I understand, also reading Internet Routing
> Archetecture(2nd edtion),
> in
> > >order to prevent routing loop, iBGP will nver be
> redistributed into OSPF.
> > >So you need to select which point to redistribute
> this specifical route
> on
> > >the router where it is learned. If wrong, please
> correct me.
> > >
> > >Joe
> > >
> > >
> > >----- Original Message -----
> > >From: "Carlos G Mendioroz" <tron@huapi.ba.ar>
> > >To: "David Ham" <ccieau@hotmail.com>
> > >Cc: <trussell@ibeam.com>;
> <ccielab@groupstudy.com>
> > >Sent: Friday, May 31, 2002 7:10 PM
> > >Subject: Re: BGP into ospf
> > >
> > >
> > > > Or it could be a connected network (local) in
> which case,
> > > > you would need to redistribute connected to
> make it work.
> > > >
> > > > This seems to be a loop prevention system...
> > > >
> > > > David Ham wrote:
> > > > >
> > > > > Tony,
> > > > >
> > > > > It looks like synchronisation problem.
> > > > >
> > > > > Do the " NO SYN" or try match Router ID on
> BGP and OSPF.
> > > > >
> > > > > David Ham
> > > > > OPTUS
> > > > >
> > > > > >From: Tony Russell <trussell@ibeam.com>
> > > > > >Reply-To: Tony Russell <trussell@ibeam.com>
> > > > > >To: "'ccielab@groupstudy.com'"
> <ccielab@groupstudy.com>
> > > > > >Subject: BGP into ospf
> > > > > >Date: Fri, 31 May 2002 11:39:08 -0500
> > > > > >
> > > > > >I am trying to redistribute some BGP routes
> into OSPF.. one of the
> > >routes
> > > > > >is
> > > > > >making it and the other is not.... I am
> unsure as to why.. can
> anyone
> > >shed
> > > > > >any light on this???? I am wondering if
> there is anything specific
> > >that I
> > > > > >should know about BGP to OSPF
> redistribution that I am obviously
> > >missing.
> > > > > >Here are some specifics
> > > > > >
> > > > > > 172.168.0.0/24 is subnetted, 2
> subnets
> > > > > >B 172.168.70.0 [20/170] via
> 137.20.10.70, 00:10:46
> > > > > >B 172.168.80.0 [200/170] via
> 137.20.86.1, 00:00:49
> > > > > >
> > > > > >The 172.168.70.0 route is making it to the
> next router but the
> > >172.168.80.0
> > > > > >is not.
> > > > > >
> > > > > >Here are the bgp entries
> > > > > >
> > > > > >*> 172.168.70.0/24 137.20.10.70
> 170 0 3 i
> > > > > >*>i172.168.80.0/24 137.20.86.1
> 170 100 0 1 i
> > > > > >
> > > > > >The 80 route shows the i for iBGP, but I
> thought it should still
> make
> > >it
> > > > > >into OSPF
> > > > > >
> > > > > >Here is the redistribute command
> > > > > >redistribute bgp 2 metric 1592 subnets
> > > > > >
> > > > > >Lets say that R1 has the BGP routes and R1
> and R2 are running
> > >OSPF....
> > > > > >after
> > > > > >redistributing BGP into OSPF I fully
> expected both routes to
> show...
> > >but
> > > > > >only one does....
> > > > > >
> > > > > >Tony Russell
> > > > > >Media Engineer
> > > > >
>
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