Hi can someone help I'm setting up a gre tunnel as a little homework for home and i'm not getting any of the routing right. Can someone
explain with my configuration where i am going wrong? I'm just trying to get the hang of it. I've been doing static routing between physical interfaces which is fine but with the tunnel interface I'm not sure what I'm meant to be routing. I have four routers connected together and it's just all static routes. The tunnel interface is always meant to have an IP isn't it? My tunnel is in an up and up state but I can't seem to ping from R1 to R2 at least to establish there is some connectivity. I think I'm still a bit confused at what a gre tunnel is I think.
R1# show run
Building configuration...
Current configuration : 2492 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no network-clock-participate slot 1
no network-clock-participate slot 2
no network-clock-participate wic 0
no network-clock-participate wic 1
no network-clock-participate wic 2
no network-clock-participate aim 0
no network-clock-participate aim 1
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
!
ip cef
ip audit po max-events 100
no ftp-server write-enable
!
!
!
!
!
interface Loopback0
ip address 192.168.2.5 255.255.255.252
!
interface Loopback1
ip address 192.168.2.1 255.255.255.252
!
interface Loopback2
ip address 192.168.2.9 255.255.255.252
!
interface Tunnel0
ip address 192.168.2.13 255.255.255.252
tunnel source 192.168.2.5
tunnel destination 192.168.2.29
!
interface FastEthernet0/0
ip address 192.168.2.17 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet1/0
no ip address
shutdown
!
interface FastEthernet1/1
no ip address
shutdown
!
interface FastEthernet1/2
no ip address
shutdown
!
interface FastEthernet1/3
no ip address
shutdown
!
interface FastEthernet1/4
no ip address
shutdown
!
interface FastEthernet1/5
no ip address
shutdown
!
interface FastEthernet1/6
no ip address
shutdown
!
interface FastEthernet1/7
no ip address
shutdown
!
interface FastEthernet1/8
no ip address
shutdown
!
interface FastEthernet1/9
no ip address
shutdown
!
interface FastEthernet1/10
no ip address
shutdown
!
interface FastEthernet1/11
no ip address
shutdown
!
interface FastEthernet1/12
no ip address
shutdown
!
interface FastEthernet1/13
no ip address
shutdown
!
interface FastEthernet1/14
no ip address
shutdown
!
interface FastEthernet1/15
no ip address
shutdown
!
interface Vlan1
no ip address
shutdown
!
router bgp 1
no synchronization
bgp log-neighbor-changes
network 192.168.2.0 mask 255.255.255.252
network 192.168.2.4 mask 255.255.255.252
network 192.168.2.16 mask 255.255.255.252
neighbor 192.168.2.29 remote-as 11
neighbor 192.168.2.29 ebgp-multihop 5
neighbor 192.168.2.29 update-source Loopback0
no auto-summary
!
no ip http server
no ip http secure-server
ip classless
ip route 0.0.0.0 0.0.0.0 Tunnel0
!
!
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
login
!
!
end
R2#show run
Building configuration...
Current configuration : 2258 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
no network-clock-participate slot 1
no network-clock-participate slot 2
no network-clock-participate wic 0
no network-clock-participate wic 1
no network-clock-participate wic 2
no network-clock-participate aim 0
no network-clock-participate aim 1
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
!
ip cef
ip audit po max-events 100
no ftp-server write-enable
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
ip address 192.168.2.18 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.2.21 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet1/0
no ip address
shutdown
!
interface FastEthernet1/1
no ip address
shutdown
!
interface FastEthernet1/2
no ip address
shutdown
!
interface FastEthernet1/3
no ip address
shutdown
!
interface FastEthernet1/4
no ip address
shutdown
!
interface FastEthernet1/5
no ip address
shutdown
!
interface FastEthernet1/6
no ip address
shutdown
!
interface FastEthernet1/7
no ip address
shutdown
!
interface FastEthernet1/8
no ip address
shutdown
!
interface FastEthernet1/9
no ip address
shutdown
!
interface FastEthernet1/10
no ip address
shutdown
!
interface FastEthernet1/11
no ip address
shutdown
!
interface FastEthernet1/12
no ip address
shutdown
!
interface FastEthernet1/13
no ip address
shutdown
!
interface FastEthernet1/14
no ip address
shutdown
!
interface FastEthernet1/15
no ip address
shutdown
!
interface Vlan1
no ip address
shutdown
!
router bgp 11
no synchronization
bgp log-neighbor-changes
network 192.168.2.16 mask 255.255.255.252
network 192.168.2.20 mask 255.255.255.252
no auto-summary
!
no ip http server
no ip http secure-server
ip classless
ip route 192.168.2.0 255.255.255.252 192.168.2.16
ip route 192.168.2.4 255.255.255.252 192.168.2.16
ip route 192.168.2.8 255.255.255.252 192.168.2.16
ip route 192.168.2.14 255.255.255.255 192.168.2.17
ip route 192.168.2.29 255.255.255.255 192.168.2.22
!
!
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
login
!
!
end
For some reason could not reply so I'll letting you know how I went with all the instructions that were posted so far.
The tunnel is in an up state and i can ping from end to end. I just had some crappy static route skills that i needed to work on. So how do I test that the tunnel works? Why would I have to configure keepalives on both ends? It's to prove that it is up but how do you prove that. Someone told me this but I just wanted to hear it again.
Message was edited by: Charlotte
