Troubleshooting Gre - HP 3600 v2 Series Configuration Manual

10 packets output,
0 output error
[SwitchB] display interface Tunnel 0
Tunnel0 current state: UP
Line protocol current state: UP
Description: Tunnel0 Interface
The Maximum Transmit Unit is 1456
Internet Address is 10.1.2.2/24 Primary
Encapsulation is TUNNEL, service-loopback-group ID is 1.
Tunnel source 2001::2:1, destination 2002::1:1
Tunnel bandwidth 64 (kbps)
Tunnel protocol/transport GRE/IPv6
GRE key disabled
Checksumming of GRE packets disabled
Output queue : (Urgent queuing : Size/Length/Discards)
Output queue : (Protocol queuing : Size/Length/Discards)
Output queue : (FIFO queuing : Size/Length/Discards)
Last clearing of counters:
Last 300 seconds input:
Last 300 seconds output:
10 packets input,
0 input error
10 packets output,
0 output error
# From Switch B, ping the IP address of VLAN-interface 100 on Switch A.
[SwitchB] ping 10.1.1.1
PING 10.1.1.1: 56
Reply from 10.1.1.1: bytes=56 Sequence=1 ttl=255 time=3 ms
Reply from 10.1.1.1: bytes=56 Sequence=2 ttl=255 time=2 ms
Reply from 10.1.1.1: bytes=56 Sequence=3 ttl=255 time=2 ms
Reply from 10.1.1.1: bytes=56 Sequence=4 ttl=255 time=2 ms
Reply from 10.1.1.1: bytes=56 Sequence=5 ttl=255 time=3 ms
--- 10.1.1.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 2/2/3 ms

Troubleshooting GRE

The key to configuring a GRE tunnel is to keep the configurations consistent on both ends of the tunnel.
Most faults can be located by using the debugging gre or debugging tunnel command. This section
analyzes one type of fault for illustration, with the scenario shown in
840 bytes
Never
0 bytes/sec, 0 packets/sec
0 bytes/sec, 0 packets/sec
840 bytes
840 bytes
data bytes, press CTRL_C to break
228
0/100/0
0/500/0
0/75/0
Figure 98.