From: Lykourgiotis Paraskevas (ParaskevasL@xxxxxxxxxxxx)
Date: Wed Jan 10 2001 - 14:26:43 GMT-3
Finally OK with network 13.1.1.0 but still having problem with 11.1.1.0
Regarding not having external peers, it's true but I just want to see what
happens with synchronisation enabled.
Here is the additional info:
r1#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
172.1.0.0/16 is variably subnetted, 4 subnets, 2 masks
C 172.1.7.0/24 is directly connected, Serial1/3
C 172.1.1.0/24 is directly connected, Serial1/1
C 172.1.1.2/32 is directly connected, Serial1/1
C 172.1.17.0/24 is directly connected, FastEthernet0/0
10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
O 10.1.3.1/32 [110/2] via 172.1.17.1, 00:18:41, FastEthernet0/0
C 10.1.2.0/24 is directly connected, Loopback0
O 10.1.1.1/32 [110/701] via 172.1.1.2, 00:19:21, Serial1/1
11.0.0.0/24 is subnetted, 1 subnets
O 11.1.1.0 [110/701] via 172.1.1.2, 00:19:21, Serial1/1
13.0.0.0/24 is subnetted, 1 subnets
O 13.1.1.0 [110/2] via 172.1.17.1, 00:18:41, FastEthernet0/0
r1#sh ip b
r1#sh ip bgp 11.1.1.0
BGP routing table entry for 11.1.1.0/24, version 0
Paths: (1 available, no best path)
Not advertised to any peer
Local
10.1.1.1 (metric 701) from 10.1.1.1 (197.1.1.1)
Origin IGP, metric 0, localpref 100, valid, internal
r1#
-----Original Message-----
From: Connary, Julie Ann [mailto:jconnary@cisco.com]
Sent: Wednesday, January 10, 2001 7:17 PM
To: Lykourgiotis Paraskevas
Cc: ccielab@groupstudy.com
Subject: Re: Why BGP doesn't synchronize?
Do not the rules of synchronization say:
you must have a route to the next hop
you must have the route in your routing table
Do you have both of these? Can we see the whole routing table.
Can you do a show ip bgp 11.1.1.0 for us.
Also - you do not have any external BGP peers - so who would you send the
route to anyways if it were the best?
Julie Ann
At 06:57 PM 1/10/2001 +0200, Lykourgiotis Paraskevas wrote:
> Hi,
>
>I have configured BGP on a router, but I haven't turned off
synchronization.
>The problem is that BGP doesn't accept the received updates as best routes,
>although the routes appear in the router's IGP routing table. Note that if
I
>turn off synchronisation, then no problem...
>Can anybody say why this happen?
>Following is some technical info:
>
>r1#sh ip route 11.0.0.0
>Routing entry for 11.0.0.0/24, 1 known subnets
> Redistributing via ospf 1
>
>O 11.1.1.0 [110/701] via 172.1.1.2, 00:07:01, Serial1/1
>r1#sh ip route
>r1#sh ip route 13.0.0.0
>Routing entry for 13.0.0.0/24, 1 known subnets
> Redistributing via ospf 1
>
>O 13.1.1.1 [110/2] via 172.1.17.1, 00:07:08, FastEthernet0/0
>r1#sh ip bg
>r1#sh ip bgp
>BGP table version is 5, local router ID is 10.1.2.1
>Status codes: s suppressed, d damped, h history, * valid, > best, i -
>internal
>Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
>* i11.1.1.0/24 10.1.1.1 0 100 0 i
>* i13.1.1.0/24 10.1.3.1 0 100 0 i
>r1#
>
>router ospf 1
> router-id 10.1.2.1
> network 10.1.2.1 0.0.0.0 area 0
> network 172.1.1.1 0.0.0.0 area 1
> network 172.1.17.10 0.0.0.0 area 0
>!
>router bgp 1
> neighbor 10.1.1.1 remote-as 1
> neighbor 10.1.1.1 update-source Loopback0
> neighbor 10.1.3.1 remote-as 1
> neighbor 10.1.3.1 update-source Loopback0
> neighbor 10.1.3.1 route-reflector-client
>!
>ip classless
>
>TIA
>Paraskevas
>
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