From: Scott (trig@xxxxxxx)
Date: Wed Aug 09 2000 - 23:49:01 GMT-3
Hello
I was trying to connect two AS with a EBGP multihop command between two
loopbacks and it looks like I am getting a some type of routing loop. The BGP
routes are put in the routing table and removed every 60 seconds (see
attached). I have IP connectivity via RIP and the connection is showing as
established. Any suggestions? Thanks
Scotty
router2#show 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, * - candidate
default
U - per-user static route, o - ODR
Gateway of last resort is not set
138.6.0.0/24 is subnetted, 2 subnets
B 138.6.5.0 [200/0] via 172.16.35.5, 00:09:52
B 138.6.1.0 [200/0] via 172.16.35.5, 00:09:52
4.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
B 4.4.4.0/24 [20/0] via 4.4.4.4, 00:00:36
R 4.0.0.0/8 [120/11] via 172.16.24.4, 00:00:27, Serial1
172.16.0.0/24 is subnetted, 5 subnets
O IA 172.16.35.0 [110/74] via 172.16.23.3, 00:10:44, Ethernet0
C 172.16.24.0 is directly connected, Serial1
C 172.16.23.0 is directly connected, Ethernet0
C 172.16.12.0 is directly connected, Serial0
C 172.16.2.0 is directly connected, Loopback0
router2#ping 4.4.4.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
router2#
05:08:12: BGP: no valid path for 4.4.4.0/24
05:08:12: BGP: nettable_walker 4.4.4.0/24 no best path
05:08:12: BGP: 4.4.4.4 computing updates, neighbor version 15, table version
16,
starting at 0.0.0.0
05:08:12: BGP: 4.4.4.4 update run completed, ran for 0ms, neighbor version 15,
s
tart version 16, throttled to 16, check point net 0.0.0.0
05:08:12: BGP: 172.16.23.1 computing updates, neighbor version 15, table
version
16, starting at 0.0.0.0
05:08:12: BGP: 172.16.23.1 send UPDATE 4.4.4.0/24 -- unreachable
05:08:12: BGP: 172.16.23.1 1 updates enqueued (average=27, maximum=27)
05:08:12: BGP: 172.16.23.1 update run completed, ran for 8ms, neighbor version
1
5, start version 16, throttled to 16, check point net 0.0.0.0
05:08:12: BGP: 172.16.23.3 computing updates, neighbor version 15, table
version
!
interface Loopback0
ip address 172.16.2.2 255.255.255.0
no ip directed-broadcast
!
!
interface Serial1
ip address 172.16.24.2 255.255.255.0
no ip directed-broadcast
clockrate 64000
!
interface BRI0
no ip address
no ip directed-broadcast
shutdown
!
router ospf 3
network 172.16.23.0 0.0.0.255 area 3
!
router rip
version 2
network 172.16.0.0
default-information originate
!
router bgp 3
no synchronization
network 172.16.2.0 mask 255.255.255.0
neighbor 4.4.4.4 remote-as 4
neighbor 4.4.4.4 ebgp-multihop 5
neighbor 4.4.4.4 update-source Loopback0
neighbor 4.4.4.4 distribute-list 2 out
neighbor 172.16.23.1 remote-as 3
neighbor 172.16.23.3 remote-as 3
!
Router 1
!
interface Loopback0
ip address 4.4.4.4 255.255.255.0
no ip directed-broadcast
!
interface Loopback1
ip address 215.6.10.1 255.255.255.0
no ip directed-broadcast
!
interface Loopback2
ip address 215.6.11.1 255.255.255.0
no ip directed-broadcast
!
interface Loopback5
no ip address
no ip directed-broadcast
!
interface Ethernet0
no ip address
no ip directed-broadcast
appletalk cable-range 600-600 600.5
appletalk zone biteme
appletalk protocol eigrp
bridge-group 1
!
interface Serial0
ip address 172.16.24.4 255.255.255.0
no ip directed-broadcast
no ip mroute-cache
no fair-queue
!
interface Serial1
ip address 172.16.10.10 255.255.255.252
no ip directed-broadcast
bridge-group 1
!
interface BRI0
no ip address
no ip directed-broadcast
shutdown
!
router rip
version 2
offset-list 1 out 10
network 4.0.0.0
network 172.16.0.0
!
router bgp 4
no synchronization
network 4.4.4.0 mask 255.255.255.0
neighbor 172.16.2.2 remote-as 3
neighbor 172.16.2.2 ebgp-multihop 5
neighbor 172.16.2.2 update-source Loopback0
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:24:23 GMT-3