Panasonic NN46240-710 - Manual (Page 73)

Nortel Secure Router 8000 Series
Troubleshooting - VPN___________ 2 GRE troubleshooting
Item Description
Tunnel source 100.1.1.1 (Serial1/0/0),
destination 100.1.1.2 The source address of the tunnel interface is
100.1.1.1 (source interface is Serial 1/0/0) and the
destination address is 100.1.1.2.
Tunnel protocol/transport GRE/IP , key
disabled The tunnel protocol is GRE.
The network layer protocol is IP.
The GRE key is disabled on the tunnel interface.
Checksumming of packets disabled Checksum of the packet is disabled on the tunnel
interface.
QoS max-bandwidth : 64 Kbps The maximum bandwidth of the tunnel interface
is 64 Kb/s.
display fib
<Nortel> display fib
FIB Table:
Total numiber of Routes : 8
Destination/Mask Nexthop Flag TimeStamp Interface Token
127 .0.0.1/32 127. 0.0.1 HU t 0] InLoop0 0x0
127 .0.0.0/8 127. 0.0.1 U t[ 0] InLoop0 0x0
1.1 .1.3/32 127. 0.0.1 HU t[ 0] InLoop0 0x0
1.1 .1.0/24 1.1. 1.3 U t[ 0] Eth3/1/0 0x0
192 .168.1.3/32 127. 0.0.1 HU t[ 0] InLoop0 0x0
192 .168.1.0/24 192. 168.1.3 U t[ 0] Eth3/2/0 0x0
2.2 .2.2/32 127. 0.0.1 HU t[ 0] InLoop0 0x0
2.2 .2.0/24 2.2. 2.2 U t[ 0] Tun4/0/0 0x0
Use the display fib command to check the reachability of other interfaces of the router.
When the status of this tunnel is down, you can use the display fib command to check for a
reachable route between the source and the destination addresses of the tunnel.
2.5.2 debugging commands
Command Description
debugging tunnel Displays the debug information on the tunnel.
debugging ip packet acl Displays information on packets that match access
control list rules.
debugging ip icmp Displays information on ping packets.
debugging tunnel
Use the output of the debugging tunnel command as an example.
Issue 5.3 (30 March 2009) Nortel Networks Inc. 2-19