An example scenario for RIP over L2TP
Network Operation
There is a single static route configured to bring up the L2TP tunnel and a secure
Each local office site is using OSPF as their routing protocol, as it offers some advanced routing features and is scalable and flexible. The 'local' VLAN networks in our example at each office site use OSPF.
RIP is used across the secure Internet connection between offices to provide a more robust network, as discussed previously. So RIP is used on the
This allows RIP to propagate the dynamically learnt OSPF 'local' VLAN network information to the other office router.
Routing Information
The routing table in each router shows locally learnt routes and the routes learnt from the remote router via RIP across the L2TP tunnel. The example output below is from the show ip route command on the 'Central office' router.
You can see that the 'local' VLAN networks (222.222.1.0 and 222.222.2.0) have been learnt via OSPF. The 'Remote office' OSPF VLAN networks (200.200.1.0 and 200.200.2.0) have been learnt via RIP. These were exported from OSPF on the 'Remote' router and propagated by RIP over the secure
IP Routes
Destination | Mask | NextHop | Interface | Age |
| Type | Policy Protocol | Metrics | Preference |
10.10.10.0 | 255.255.255.0 | 0.0.0.0 | eth0 | 644 | |
| direct | 0 | interface | 1 | 0 |
10.10.10.0 | 255.255.255.0 | 10.10.10.2 | eth0 | 644 | |
| direct | 0 | static | 1 | 60 |
10.10.10.0 | 255.255.255.0 | 192.168.1.2 | ppp0 | 627 | |
| remote | 0 | rip | 2 | 100 |
192.168.1.0 | 255.255.255.0 | 0.0.0.0 | ppp0 | 644 | |
| direct | 0 | interface | 1 | 0 |
200.200.1.0 | 255.255.255.0 | 192.168.1.2 | ppp0 | 627 | |
| remote | 0 | rip | 2 | 100 |
200.200.2.0 | 255.255.255.0 | 192.168.1.2 | ppp0 | 627 | |
| remote | 0 | rip | 2 | 100 |
222.222.1.0 | 255.255.255.0 | 0.0.0.0 | vlan1 | 644 | |
| direct | 0 | interface | 1 | 0 |
222.222.1.0 | 255.255.255.0 | 0.0.0.0 | vlan1 | 641 | |
| remote | 0 | 1 | 10 | |
222.222.2.0 | 255.255.255.0 | 0.0.0.0 | vlan2 | 644 | |
| direct | 0 | interface | 1 | 0 |
222.222.2.0 | 255.255.255.0 | 0.0.0.0 | vlan2 | 636 | |
| remote | 0 | 1 | 10 |
Page 3 AlliedWare™ OS How To Note: Dynamic Routing over L2TP