From: Matthew Poole (matthew.poole@blueyonder.co.uk)
Date: Fri Jan 03 2003 - 11:49:27 GMT-3
Hi All,
I can't get my head around Doyle vol II case study, IBGP over an IGP
P174-176.
I have my routers configured as on P175, prior lab worked fine with fully
meshed IBGP. Once the IGP was introduced it started to fall apart!!
Both Vail and and Telerude can see all routes via OSPF and IBGP, however no
best route is selected or advertised - if I turn off synchronisation then it
works correctly.
IP addresses as on diagram, I've only included AS100 configs and routes.
I'd appreciate any insight on this!
Thanks,
Mat.
Aspen
router ospf 500
log-adjacency-changes
network 192.168.1.0 0.0.0.255 area 0
Show IP route
Gateway of last resort is not set
O E2 192.168.200.0/24 [110/1] via 192.168.1.221, 00:14:50, Serial0
O E2 192.168.250.0/24 [110/1] via 192.168.1.221, 00:14:50, Serial0
192.168.1.0/30 is subnetted, 7 subnets
O 192.168.1.224 [110/845] via 192.168.1.221, 00:14:50, Serial0
O 192.168.1.204 [110/845] via 192.168.1.197, 00:14:50, Serial1
C 192.168.1.196 is directly connected, Serial1
O E2 192.168.1.216 [110/1] via 192.168.1.221, 00:14:50, Serial0
C 192.168.1.220 is directly connected, Serial0
O 192.168.1.208 [110/845] via 192.168.1.221, 00:14:51, Serial0
O E2 192.168.1.212 [110/1] via 192.168.1.221, 00:14:51, Serial0
O E2 192.168.100.0/24 [110/1] via 192.168.1.221, 00:14:51, Serial0
Vail
router ospf 500
log-adjacency-changes
redistribute bgp 100 subnets
network 192.168.1.221 0.0.0.0 area 0
network 192.168.1.0 0.0.0.255 area 0
!
router bgp 100
bgp router-id 1.1.3.2
bgp cluster-id 3232301054
bgp log-neighbor-changes
neighbor 192.168.1.197 remote-as 100
neighbor 192.168.1.197 next-hop-self
neighbor 192.168.1.210 remote-as 300
neighbor 192.168.1.225 remote-as 200
neighbor 192.168.1.225 default-originate
no auto-summary
R4-Vail#sh ip bgp
BGP table version is 27, local router ID is 1.1.3.2
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
* i192.168.1.200/30 192.168.1.197 80 100 0 400 ?
*>i192.168.1.204/30 192.168.1.197 80 100 0 400 ?
*> 192.168.1.208/30 192.168.1.210 50 0 300 ?
*> 192.168.1.212/30 192.168.1.210 50 0 300 ?
*> 192.168.1.216/30 192.168.1.225 0 0 200 i
*> 192.168.1.224/30 192.168.1.225 0 0 200 ?
* i192.168.50.0 192.168.1.197 80 100 0 400 ?
* i192.168.75.0 192.168.1.197 80 100 0 400 ?
*> 192.168.100.0 192.168.1.225 0 0 200 i
*> 192.168.200.0 192.168.1.225 20 0 200 i
*> 192.168.250.0 192.168.1.210 50 0 300 ?
R4-Vail#sipr
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 192.168.200.0/24 [20/20] via 192.168.1.225, 00:32:59
B 192.168.250.0/24 [20/50] via 192.168.1.210, 00:32:44
192.168.255.0/32 is subnetted, 1 subnets
C 192.168.255.254 is directly connected, Loopback0
192.168.1.0/30 is subnetted, 7 subnets
C 192.168.1.224 is directly connected, Serial1/2
O 192.168.1.204 [110/1626] via 192.168.1.222, 00:16:11, Serial1/0
O 192.168.1.196 [110/845] via 192.168.1.222, 00:16:11, Serial1/0
B 192.168.1.216 [20/0] via 192.168.1.225, 00:33:01
C 192.168.1.220 is directly connected, Serial1/0
C 192.168.1.208 is directly connected, Serial1/3
B 192.168.1.212 [20/50] via 192.168.1.210, 00:32:45
B 192.168.100.0/24 [20/0] via 192.168.1.225, 00:33:01
Telluride
router ospf 500
log-adjacency-changes
network 192.168.1.197 0.0.0.0 area 0
network 192.168.1.0 0.0.0.255 area 0
!
router bgp 100
bgp log-neighbor-changes
neighbor 192.168.1.205 remote-as 400
neighbor 192.168.1.221 remote-as 100
neighbor 192.168.1.221 next-hop-self
no auto-summary
R3-Telluride#sh ip bgp
BGP table version is 5, local router ID is 192.168.1.206
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
*> 192.168.1.200/30 192.168.1.205 80 0 400 ?
*> 192.168.1.204/30 192.168.1.205 80 0 400 ?
* i192.168.1.208/30 192.168.1.221 50 100 0 300 ?
* i192.168.1.212/30 192.168.1.221 50 100 0 300 ?
* i192.168.1.216/30 192.168.1.221 0 100 0 200 i
* i192.168.1.224/30 192.168.1.221 0 100 0 200 ?
*> 192.168.50.0 192.168.1.205 80 0 400 ?
*> 192.168.75.0 192.168.1.205 80 0 400 ?
* i192.168.100.0 192.168.1.221 0 100 0 200 i
* i192.168.200.0 192.168.1.221 20 100 0 200 i
* i192.168.250.0 192.168.1.221 50 100 0 300 ?
R3-Telluride#sipr
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 192.168.75.0/24 [20/80] via 192.168.1.205, 00:24:54
O E2 192.168.200.0/24 [110/1] via 192.168.1.198, 00:17:20, Serial1/0
O E2 192.168.250.0/24 [110/1] via 192.168.1.198, 00:17:20, Serial1/0
B 192.168.50.0/24 [20/80] via 192.168.1.205, 00:24:54
192.168.1.0/30 is subnetted, 8 subnets
O 192.168.1.224 [110/1626] via 192.168.1.198, 00:17:20, Serial1/0
B 192.168.1.200 [20/80] via 192.168.1.205, 00:24:54
C 192.168.1.204 is directly connected, Serial1/1
C 192.168.1.196 is directly connected, Serial1/0
O E2 192.168.1.216 [110/1] via 192.168.1.198, 00:17:21, Serial1/0
O 192.168.1.220 [110/845] via 192.168.1.198, 00:17:21, Serial1/0
O 192.168.1.208 [110/1626] via 192.168.1.198, 00:17:21, Serial1/0
O E2 192.168.1.212 [110/1] via 192.168.1.198, 00:17:21, Serial1/0
O E2 192.168.100.0/24 [110/1] via 192.168.1.198, 00:17:23, Serial1/0
.
This archive was generated by hypermail 2.1.4 : Sat Feb 01 2003 - 07:33:39 GMT-3