3Com S7906E Configuration Manual page 988

[SwitchA] interface tunnel 0
[SwitchA-Tunnel0] ip address 50.1.1.1 24
# Configure Tunnel 0 to work in the GRE tunnel mode and specify the source and destination addresses
of the interface.
[SwitchA-Tunnel0] tunnel-protocol gre
[SwitchA-Tunnel0] source 20.1.1.1
[SwitchA-Tunnel0] destination 30.1.1.2
[SwitchA-Tunnel0] quit
# Create Tunnel 0 on Switch C and configure the IP address and mask for the interface.
<SwitchC> system-view
[SwitchC] interface tunnel 0
[SwitchC-Tunnel0] ip address 50.1.1.2 24
# Configure Tunnel to operate in the GRE tunnel mode and configure the source and destination
addresses of the interface.
[SwitchC-Tunnel0] tunnel-protocol gre
[SwitchC-Tunnel0] source 30.1.1.2
[SwitchC-Tunnel0] destination 20.1.1.1
[SwitchC-Tunnel0] quit
3) Configure OSPF.
# Configure OSPF on Switch A.
[SwitchA] ospf 1
[SwitchA-ospf-1] area 0
[SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 20.1.1.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 50.1.1.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# Configure OSPF on Switch B.
<SwitchB> system-view
[SwitchB] ospf 1
[SwitchB-ospf-1] area 0
[SwitchB-ospf-1-area-0.0.0.0] network 20.1.1.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] network 30.1.1.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] quit
[SwitchB-ospf-1] quit
# Configure OSPF on Switch C.
[SwitchC] ospf 1
[SwitchC-ospf-1] area 0
[SwitchC-ospf-1-area-0.0.0.0] network 30.1.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.0] network 40.1.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.0] network 50.1.1.0 0.0.0.255
[SwitchC-ospf-1-area-0.0.0.0] quit
[SwitchC-ospf-1] quit
4) Enable IP multicast routing, PIM-DM, and IGMP.
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