05-31-2006 02:55 AM - edited 03-03-2019 12:50 PM
Hi
I want to config the GRE Tunnel over my 7206 VXR running BGP on it,
I have read the DOC about GRE tunnel Config. on cisco site in tgis DOc the routing protocol is EIGRP ... this is the title of DOc
(GRE over IPSec with EIGRP to Route Through a Hub and Multiple Remote Sites Configuration Example )
i want to ask same config will work for BGP or not ??????
Thanks
05-31-2006 04:36 AM
Not sure if I found the doc you are talking about.
In general BGP is far more forgiving that EIGRP or any IGP for that matter. BGP uses TCP to essablish it neighbors unlike EIGRP that uses multicast.
You should have no issues using the tunnel end points as your BGP neighbors.
With BGP it is possible with some careful IPSEC configuration to use only IPSEC and avoid the overhead of the GRE tunnel.
05-31-2006 05:59 AM
It should work. I would recommend using loopbacks for your BGP peers and then pointing to the tunnels for each of the neighbor loopbacks. My friends and I did this so we could run BGP with each other from our home connections.
05-31-2006 06:46 AM
Hi
Can u provide me sample configuration of tunnel and also sample configuration with GRE over bgp
Thanks for the response
11-27-2006 02:04 PM
http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a00800a43f6.shtml
That should be a good starting point. It is using OSPF, but if you replace it with BGP you should be able to accomplish what you are trying to do.
11-27-2006 09:06 PM
Hi friend,
Here is a sample config
Router 1
interface Tunnel3
ip address 10.10.10.50 255.255.255.252
keepalive 10 3
tunnel source 192.168.172.30
tunnel destination 192.168.172.2
router bgp 64521
no synchronization
bgp log-neighbor-changes
network 172.16.119.0 mask 255.255.255.0
timers bgp 5 15
neighbor 192.168.172.29 remote-as 9730
neighbor 192.168.172.29 ebgp-multihop 2
no auto-summary
Router 2
interface Tunnel3
ip address 10.10.10.50 255.255.255.252
keepalive 10 3
tunnel source 192.168.172.2
tunnel destination 192.168.172.30
router bgp 64521
no synchronization
bgp log-neighbor-changes
network 172.16.100.0 mask 255.255.255.0
timers bgp 5 15
neighbor 192.168.172.1 remote-as 9730
neighbor 192.168.172.1 ebgp-multihop 2
no auto-summary
You can also use loopbacks as suggested in the earlier post. Make sure your loopbacks are reachable through the BGP cloud
HTH, rate if it does
Narayan
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