Panasonic NN46240-710 - Manual (Page 66)

2 GRE troubleshooting
Nortel Secure Router 8000 Series
_________ Troubleshooting - VPN
5 minutes output rate 0 bytes/sec, 0 packets/sec
0 packets input, 0 bytes
0 input error
0 packets output, 0 bytes
0 output error
The output of the command on Nortel 2 is as follows:
[Nortel2] display interface Tunnel 1/0/0
Tunnel1/0/0 current state : UP
Line protocol current state : UP
Description : Nortel Series, Tunnel1/0/0 Interface
The Maximum Transmit Unit is 1000 bytes
Internet Address is 21.1.1.1/24
Encapsulation is TUNNEL, loopback not set
Tunnel source 2.2.2.2 (LoopBack1), destination 1.1.1.1
Tunnel protocol/transport GRE/IP , key disabled
linkalive disabled
Checksumming of packets disabled
QoS max-bandwidth : 64 Kbps
Output queue : (Urgent queue : Size/Length/Discards) 0/50/0
Output queue : (Protocol queue : Size/Length/Discards) 0/1000/0
Output queue : (FIFO queuing : Size/Length/Discards) 0/256/0
5 minutes input rate 0 bytes/sec, 0 packets/sec
5 minutes output rate 0 bytes/sec, 0 packets/sec
0 packets input, 0 bytes
0 input error
0 packets output, 0 bytes
0 output error
From the preceding output, you can see that Nortel 1 uses the GRE key with the key number 2;
while Nortel 2 does not use a GRE key.
Perform one of the following configurations to remove the fault:
• Use the undo gre key command on Nortel 1 to disable the GRE key.
• Use the gre key2 command on Nortel 2 to enable the GRE key.
If you cannot remove the fault, run the display this command in the interface view on both ends
of the tunnel to view the IP addresses of the two ends.
The display on Nortel 1 is as follows:
•
interface Tunnel1/0/0
ip address 11.1.1.1 255.255.255.0
source LoopBack1
destination 2.2.2.2
gre key 2
mtu 1000
#
The display on Nortel 2 is as follows:
#
interface Tunnel1/0/0
ip address 21.1.1.1 255.255.255.0
source LoopBack1
2-12 Nortel Networks Inc. Issue 5.3 (30 March2009)