zakar1a
asked on
a question with BGP loopback neighbor establishement
hello,
i have 2 routers on GNS3, i want to configure BGP based on the loopback of each router, but it never comes to Established status, it is stuck in "Active" here is my topology:
R1 =================
//================== R2
Config:
R1:
R1#show run
Building configuration...
Current configuration : 1048 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
no ip domain lookup
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback1
ip address 1.1.1.1 255.255.255.0
!
interface Serial0/0
ip address 192.168.12.1 255.255.255.0
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router bgp 1
no synchronization
bgp router-id 1.1.1.1
bgp log-neighbor-changes
network 192.168.12.0
neighbor 2.2.2.2 remote-as 2
neighbor 2.2.2.2 ebgp-multihop 2
neighbor 2.2.2.2 update-source Loopback1
no auto-summary
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
!
!
end
R1#
==========================
R2:
R2#show run
Building configuration...
Current configuration : 1048 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
no ip domain lookup
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback1
ip address 2.2.2.2 255.255.255.0
!
interface Serial0/0
ip address 192.168.12.2 255.255.255.0
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router bgp 2
no synchronization
bgp router-id 2.2.2.2
bgp log-neighbor-changes
network 192.168.12.0
neighbor 1.1.1.1 remote-as 1
neighbor 1.1.1.1 ebgp-multihop 2
neighbor 1.1.1.1 update-source Loopback1
no auto-summary
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
!
!
end
R2#
i have 2 routers on GNS3, i want to configure BGP based on the loopback of each router, but it never comes to Established status, it is stuck in "Active" here is my topology:
R1 =================
//================== R2
Config:
R1:
R1#show run
Building configuration...
Current configuration : 1048 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
no ip domain lookup
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback1
ip address 1.1.1.1 255.255.255.0
!
interface Serial0/0
ip address 192.168.12.1 255.255.255.0
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router bgp 1
no synchronization
bgp router-id 1.1.1.1
bgp log-neighbor-changes
network 192.168.12.0
neighbor 2.2.2.2 remote-as 2
neighbor 2.2.2.2 ebgp-multihop 2
neighbor 2.2.2.2 update-source Loopback1
no auto-summary
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
!
!
end
R1#
==========================
R2:
R2#show run
Building configuration...
Current configuration : 1048 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
no ip domain lookup
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback1
ip address 2.2.2.2 255.255.255.0
!
interface Serial0/0
ip address 192.168.12.2 255.255.255.0
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router bgp 2
no synchronization
bgp router-id 2.2.2.2
bgp log-neighbor-changes
network 192.168.12.0
neighbor 1.1.1.1 remote-as 1
neighbor 1.1.1.1 ebgp-multihop 2
neighbor 1.1.1.1 update-source Loopback1
no auto-summary
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
!
!
end
R2#
Ken Boone
The problem is that either router does not have a route to the other's BGP loopback address. You have to be able to at least reach your BGP peer and right now you cannot. Add a static route on each router to reach the other's BGP peer ip address and then it should come up.
ASKER
i got this from debug:
*Mar 1 01:24:06.947: BGP: 2.2.2.2 active open failed - no route to peer, open active delayed 26593ms (35000ms max, 28% jitter)
*Mar 1 01:24:06.947: BGP: 2.2.2.2 active open failed - no route to peer, open active delayed 26593ms (35000ms max, 28% jitter)
ASKER CERTIFIED SOLUTION
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ASKER
you meant :
ip route 2.2.2.2 255.255.255.255 192.168.12.2
ip route 1.1.1.1 255.255.255.255 192.168.12.1
right?
ip route 2.2.2.2 255.255.255.255 192.168.12.2
ip route 1.1.1.1 255.255.255.255 192.168.12.1
right?
yea correct.
ASKER
thank you