Displaying And Debugging Gre; Gre Configuration Example - 3Com 3032 Configuration Manual

Displaying and
Debugging GRE
GRE Configuration
Example
Application of IP-over-IP
GRE
Disable tunnel interface to synchronize
sequence numbers.
By default, the tunnel interface to synchronize datagram sequence numbers is
disabled.
To view the working status of the tunnel interface, use the
all views.
Table 694 Display and Debug GRE
Operation
Display the working status of tunnel
interface.
VPN should be built across the WAN for the operation of Novell IPX's two subnets
group1 and group2. It can be implemented by using GRE.
PC A communicates with PC B in GRE tunneling mode in the Internet. Router A
and Router B are two ends of the GRE tunnel, while Router C is located in the GRE
tunnel.
Figure 204 Networking diagram of GRE application
Router A
E0
PC A
10.110.24.100
10.110.24.1
1 Configure PC A and PC B:
a Configure the IP address of PC_A to 10.110.24.100, add a default gateway in
the network attribute (i.e., default route), or use the following command in
DOS mode.
C:\WINDOWS> route add 0.0.0.0 mask 0.0.0.0 10.110.24.1
b Configure the IP address of PC_B to 30.110.1.200, add a default gateway in
the network attribute (i.e., default route), or use the following command in
DOS mode.
C:\WINDOWS> route add 0.0.0.0 mask 0.0.0.0 30.110.1.1
2 Configure Router A:
a Configure the IP address of Serial0 interface.
[RouterA] interface serial 0
[RouterA-Serial0] ip address 10.1.1.1 255.255.255.0
undo gre sequence-datagrams
Command
display interfaces tunnel [
tunnel-number ]
10.1.1.2 20.1.1.1
10.1.1.1
Router C
S0 S0 S1
Internet
tunnel

Displaying and Debugging GRE

command in
display
20.1.1.2
Router B
S0
E0
PC B
30.110.1.200
30.110.1.1
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