Cisco ONS 15454 DWDM Reference Manual page 588

15.3.4 DCN Case Study 1: Ring Topology with Two Subnets and Two DCN Connections
ip address 192.168.20.1 255.255.255.0
no ip directed-broadcast
!
interface Ethernet2/0
ip address 192.168.10.1 255.255.255.0
no ip directed-broadcast
!
Static routes with alternate paths at different costs:
ip classless
ip route 192.168.100.0 255.255.255.0 192.168.10.2
ip route 192.168.100.0 255.255.255.0 192.168.20.2 10
ip route 192.168.200.0 255.255.255.0 192.168.20.2
ip route 192.168.200.0 255.255.255.0 192.168.10.2 10
15.3.4.1.2 Router 1 IP Configuration
Interface configuration:
interface Ethernet0/0
ip address 192.168.10.2 255.255.255.0
no ip directed-broadcast
!
interface Ethernet1/0
ip address 192.168.100.1 255.255.255.0
no ip directed-broadcast
!
GRE tunnel interface configuration:
interface Tunnel0
ip address 192.168.30.1 255.255.255.0
tunnel source Ethernet1/0
tunnel destination 192.168.200.1
Static routes with alternate paths at different costs:
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.10.1
ip route 10.0.0.0 255.0.0.0 192.168.10.1
ip route 10.0.0.0 255.0.0.0 Tunnel0 10
ip route 192.168.200.0 255.255.255.0 Tunnel0 10
ip route 192.168.200.1 255.255.255.255 192.168.100.80
Note the host route to the peer Router 2 (192.168.200.1) points to the ONS 15454 network (through
192.168.100.80). This is required to set up the GRE tunnel. In this configuration, only the external route
to 10.0.0.0 (that includes the NOC network) is overloaded with the alternate path. However, overloading
might occur on this last-resort route.
15.3.4.1.3 Router 2 IP Configuration
Interface configuration:
interface Ethernet0/0
ip address 192.168.20.2 255.255.255.0
no ip directed-broadcast
!
interface Ethernet1/0
ip address 192.168.200.1 255.255.255.0
no ip directed-broadcast
Cisco ONS 15454 DWDM Reference Manual, R8.5
15-26
Chapter 15 Management Network Connectivity
78-18343-02