Difference between revisions of "Cisco Multi-point GRE Routing"

From Tech-Wiki
Jump to: navigation, search
(Created page with "Category:Cisco Systems When you use tunel mode gre multipoint you have to use numbered ip on the tunnel interface (you can't use ip unnumbered loopback/fastEthernet etc..). ...")
 
Line 20: Line 20:
 
  ip route 2.0.0.0 255.0.0.0 tunnel0
 
  ip route 2.0.0.0 255.0.0.0 tunnel0
 
You can then have routes to that site via the remote tunnel ip.
 
You can then have routes to that site via the remote tunnel ip.
  ip route REMOTE-SUBNET MASK 2.0.0.4
+
  ip route <REMOTE-SUBNET> <MASK> 2.0.0.4

Revision as of 07:56, 7 March 2012

When you use tunel mode gre multipoint you have to use numbered ip on the tunnel interface (you can't use ip unnumbered loopback/fastEthernet etc..).

interface Tunnel0
 ip address 1.0.0.1 255.255.255.0
 no ip redirects
 ip nhrp map 1.0.0.2 TUNNEL-DESTINATION-ROUTABLE-IP
 ip nhrp map 1.0.0.3 TUNNEL-DESTINATION-ROUTABLE-IP
 ip nhrp map 2.0.0.4 TUNNEL-DESTINATION-ROUTABLE-IP
 ip nhrp network-id 192
 ip nhrp server-only non-caching
 #external ip used for tunnel source
 tunnel source FastEthernet0/1
 tunnel mode gre multipoint
 tunnel key 100

If tunnel ip (1.0.0.1) and remote tunnel ip (2.0.0.4) are not in the same subnet you need a route to the remote tunnel ip via tunnel0:

ip route 2.0.0.0 255.0.0.0 tunnel0

You can then have routes to that site via the remote tunnel ip.

ip route <REMOTE-SUBNET> <MASK> 2.0.0.4