From: K Sarangan (K.Sarangan@xxxxxxxxxxxxx)
Date: Tue Aug 27 2002 - 03:42:20 GMT-3
Guys,
Is there anything else which determines BGP synchronisation apart from IGP rout
e, OSPF/BGP id?.
Iam having a problem with sync in R5. All are running OSPF as IGP. R1 does not
run BGP.
R5 --IBGP--R2-----IBGP-------|-----------IBGP---------R3(spoke)
(spoke) | 129.100.3.3
129.100.2.2 |
R1(FR Hub)OSPF only
Lo-129.100.1.1
Iam giving network statement on R2 for 129.100.1.1, 129.100.2.2, 129.100.3.3.
But Iam able to sync only with 129.100.2.2. OSPF, BGP Ids are same.
R2#sh ip bgp
BGP table version is 11, local router ID is 129.100.2.2
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
*>i129.100.0.0 129.100.3.3 0 100 0 i
*> 129.100.1.0/24 0.0.0.0 65 32768 i
*> 129.100.2.0/24 0.0.0.0 0 32768 i
*> 129.100.3.0/24 0.0.0.0 65 32768 i
*> 129.100.20.0/24 0.0.0.0 0 32768 i
* i130.100.0.0 129.100.3.3 0 100 0 i
*> 0.0.0.0 0 32768 i
*>i172.16.0.0 130.100.25.5 0 100 0 i
*>i192.168.1.0 129.100.3.3 0 100 0 40 i
R2#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
B 172.16.0.0/16 [200/0] via 130.100.25.5, 01:07:52
129.100.0.0/16 is variably subnetted, 6 subnets, 2 masks
C 129.100.123.0/24 is directly connected, Serial1
O 129.100.1.0/24 [110/65] via 129.100.123.1, 00:18:05, Serial1
B 129.100.0.0/16 [200/0] via 129.100.3.3, 00:57:39
O 129.100.3.0/24 [110/65] via 129.100.123.3, 00:18:05, Serial1
C 129.100.2.0/24 is directly connected, Loopback0
C 129.100.20.0/24 is directly connected, Ethernet0
130.100.0.0/16 is variably subnetted, 3 subnets, 2 masks
O 130.100.34.0/24 [110/11175] via 129.100.123.3, 00:18:06, Serial1
C 130.100.25.5/32 is directly connected, Serial0
C 130.100.25.0/24 is directly connected, Serial0
O E2 192.168.1.0/24 [110/1] via 129.100.123.3, 00:18:06, Serial1
R2#
R5#sh ip bgp
BGP table version is 9, local router ID is 172.16.1.1
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
* i129.100.1.0/24 130.100.25.2 65 100 0 i -------
--------Not sync.
*>i129.100.2.0/24 130.100.25.2 0 100 0 i
* i129.100.3.0/24 130.100.25.2 65 100 0 i ------
---------Not sync.
*>i129.100.20.0/24 130.100.25.2 0 100 0 i
* i130.100.0.0 130.100.25.2 0 100 0 i
*> 172.16.0.0 0.0.0.0 0 32768 i
R5#sh ip rou
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, * - candidate default
U - per-user static route, o - ODR, P - periodic downloaded static route
T - traffic engineered route
Gateway of last resort is not set
C 172.16.0.0/16 is directly connected, Loopback0
129.100.0.0/24 is subnetted, 5 subnets
O 129.100.123.0 [110/1626] via 130.100.25.2, Serial0/1
O 129.100.1.0 [110/1627] via 130.100.25.2, Serial0/1 -------------
Route available
O 129.100.3.0 [110/1627] via 130.100.25.2, Serial0/1 -------------
Route available
O 129.100.2.0 [110/1563] via 130.100.25.2, Serial0/1
O 129.100.20.0 [110/1572] via 130.100.25.2, Serial0/1
130.100.0.0/16 is variably subnetted, 4 subnets, 2 masks
O 130.100.34.0/24 [110/12737] via 130.100.25.2, Serial0/1
C 130.100.54.0/24 is directly connected, Ethernet0/0
C 130.100.25.2/32 is directly connected, Serial0/1
C 130.100.25.0/24 is directly connected, Serial0/1
O E2 192.168.1.0/24 [110/1] via 130.100.25.2, Serial0/1
R5#
TIA,
Sarangan. K
Network Consultant
Cable & Wireless Enterprise
Bangalore, India
Delivering the Internet Promise
http://www.cw.com/enterprise
Phone : +91 80 8412000. Extn-3414
Mobile : +91 98453 16850
e-mail : k.sarangan@cwgoindia.com
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