3Com Switch 8800 Family IPsec Module Configuration and Command reference Guide

356 CHAPTER 21: GRE CONFIGURATION COMMANDS
at the opposite tunnel interface, and the route to the opposite physical interface
should be ensured reachable.
The same source address and destination address cannot be configured on two or
more tunnel interfaces using the same encapsulation protocol.
Related command: interface tunnel and source.
Example
# Set up tunnel connection between the interface GigabitEthernet0/0.1 of
SecBlade_VPN1 (with IP address of 193.101.1.1) and the interface
GigabitEthernet0/0.2 of the SecBlade_VPN2 (with IP address of 192.100.1.1).
[SecBlade_VPN1-Tunnel0] source 193.101.1.1
[SecBlade_VPN1-Tunnel0] destination 192.100.1.1
[SecBlade_VPN2-Tunnel1] source 192.100.1.1
[SecBlade_VPN2-Tunnel1] destination 193.101.1.1
display interface tunnel Syntax
display interface tunnel [number ]
view
Any view
Parameter
number: Tunnel interface number, in the range of 0 to 1,023.
Description
Use the display interface tunnel command to view the working status of tunnel
interface.
Executing the display interface tunnel command displays such information
about the tunnel interface as source address, destination address (the real physical
interface address receiving/sending GRE packet), encapsulation mode,
identification keyword and end-to-end check, etc.
Related command: source, destination, gre key, gre checksum, and
tunnel-protocol.
Example
# Display the current tunnel interface.
<SecBlade_VPN> display interface tunnel 2
Tunnel2 current state :UP
Line protocol current state :DOWN
Description : Tunnel0 Interface
The Maximum Transmit Unit is 64000
Internet Address is 192.168.2.1/24
Encapsulation is TUNNEL, loopback not set
Tunnel source 192.168.0.1 (GigabitEthernet0/0.1), destination 202.38.16.188
Tunnel keepalive disable
Tunnel protocol/transport GRE/IP, key disabled
Checksumming of packets disabled
Last 300 seconds input: 0 bytes/sec, 0 packets/sec
Last 300 seconds output: 0 bytes/sec, 0 packets/sec
0 packets input, 0 bytes