Network Router User Manual

2 GRE troubleshooting
Nortel Secure Router 8000 Series
Troubleshooting - VPN
2-18 Nortel Networks Inc. Issue 5.3 (30 March2009)
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Table 2-1 Description of the display this command output
Item Description
ip address 2.2.2.2 255.255.255.0 The IP address of the tunnel interface is 2.2.2.2
and the mask is 255.255.255.0.
source Ethernet3/2/0 The source interface of the tunnel interface is
Ethernet 3/2/0.
destination 192.168.1.1 The destination address of the tunnel interface is
192.168.1.1.
gre key 10 The key number of the tunnel interface is 10.
gre checksum Checksum is enabled on the tunnel interface.
display this interface
[Nortel-Tunnel1/0/0] display this interface
Tunnel1/0/0 current state : UP
Line protocol current state : UP
Description : Nortel Series, Tunnel1/0/0 Interface, Route Port
The Maximum Transmit Unit is 1500 bytes
Internet Address is 30.1.1.2/24
Encapsulation is TUNNEL, loopback not set
Tunnel source 100.1.1.1 (Serial1/0/0), destination 100.1.1.2
Tunnel protocol/transport GRE/IP , key 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) 0/75/0
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
Table 2-2 Description of the display this interface command output
Item Description
Tunnel1/0/0 current state : UP The status of the tunnel interface is Up.
Line protocol current state : UP The protocol status of the tunnel interface is Up.
The Maximum Transmit Unit is 1500
bytes
The MTU of the tunnel interface is 1500 bytes.
Internet Address is 30.1.1.2/24 The IP address of the tunnel interface is 30.1.1.2.
The mask is 24-bit, namely, 255.255.255.0.