Hey Group,
I'm doing a little BGP lab here in my home, and I'm running into problems
when trying to get the next-hop-self command to work in between IGP peers.
Here's my topology:
r2503 --EBGP-- r2523 --IBGP-- r2504 --IBGP-- r2501
AS200 AS100 AS100 AS100
r2503 has no problem advertising its loopback (1.1.1.1/24) to r2523 through
their EBGP connection. r2523 then sends the 1.1.1.1/24 route to r2504 while
changing the next hop to r2523. The problem is that r2504 cannot send the
1.1.1.1/24 router to r2501. I assumed that the next-hop-self command would
be important in this situation, but it isn't working. Is there anything that
I am doing wrong here?
Here are the configs (without unnecessary info):
hostname r2503
!
interface Loopback0
ip address 1.1.1.1 255.255.255.0
!
interface Serial0
ip address 192.1.1.1 255.255.255.0
!
router bgp 100
network 1.0.0.0
neighbor 192.1.1.2 remote-as 200
!
----------------------------------------------
hostname r2523
!
interface Loopback0
ip address 2.2.2.2 255.255.255.0
!
interface Serial1
ip address 192.1.1.2 255.255.255.0
clockrate 64000
!
interface Serial2
ip address 193.1.1.2 255.255.255.0
clockrate 64000
!
router bgp 200
network 2.0.0.0
neighbor 192.1.1.1 remote-as 100
neighbor 193.1.1.1 remote-as 200
neighbor 193.1.1.1 next-hop-self
no synchronization
--------------------------------------------
hostname r2504
!
interface Loopback0
ip address 3.3.3.3 255.255.255.0
!
interface Serial0
ip address 193.1.1.1 255.255.255.0
!
interface Serial1
ip address 194.1.1.1 255.255.255.0
!
router bgp 200
no synchronization
network 3.0.0.0
neighbor 193.1.1.2 remote-as 200
neighbor 193.1.1.2 route-reflector-client
neighbor 193.1.1.2 next-hop-self
neighbor 194.1.1.2 remote-as 200
neighbor 194.1.1.2 route-reflector-client
neighbor 194.1.1.2 next-hop-self
------------------------------------------------
hostname r2501
!
interface Loopback0
ip address 4.4.4.4 255.255.255.0
no ip directed-broadcast
!
interface Serial0
ip address 194.1.1.2 255.255.255.0
clockrate 64000
!
router bgp 200
no synchronization
network 4.0.0.0
neighbor 194.1.1.1 remote-as 200
Thanks in advance,
Fred
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