From: CCIEin2006 (ciscocciein2006@gmail.com)
Date: Mon Mar 20 2006 - 12:18:56 GMT-3
Gustavio,
You are right, the route learned via OSPF is from one router and the router
advertised by BGP is another router.
On 3/20/06, Gustavo Novais <gustavo.novais@novabase.pt> wrote:
>
> For OSPF and BGP, the sync rule also states that the router-id of the
> router that announces the net to OSPF must be the same of the one (iBGP
> peer) who injects it to BGP.
>
> Check it on
>
>
>
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094431.
shtml#background
>
> or TCP/IP Vol2
>
> HTH
>
> Gustavo Novais
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> CCIEin2006
> Sent: segunda-feira, 20 de Margo de 2006 15:01
> To: ccielab@groupstudy.com
> Subject: BGP synchronization rule not working
>
> Hey guys,
>
> I'm doing a lab in which BGP synchronization must be enabled.
> I know the rule states that a route must be in the IGP table before
> advertised to BGP peer.
>
> In this case I have an OSPF E2 route in my routing table:
>
> Rack1R6#show ip route 139.1.5.0
> Routing entry for 139.1.5.0/24
> Known via "ospf 1", distance 110, metric 20, type extern 2, forward metric
> 129
> Last update from 139.1.0.3 on FastEthernet0/1, 13:21:38 ago
> Routing Descriptor Blocks:
> * 139.1.0.3, from 150.1.5.5, 13:21:38 ago, via FastEthernet0/1
> Route metric is 20, traffic share count is 1
>
>
> But BGP is saying the route is not synchronized:
>
> Rack1R6#show ip bgp 139.1.5.0
> BGP routing table entry for 139.1.5.0/24, version 0
> Paths: (1 available, no best path)
> Not advertised to any peer
> Local
> 139.1.45.5 (metric 20) from 150.1.4.4 (150.1.4.4)
> Origin IGP, metric 1, localpref 100, valid, internal, not
> synchronized
> Rack1R6#
>
> It is clearly being learned by OSPF, so why does BGP not consider
> it synchronized?!?
>
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