HP Comware 5 Debug Manual Vol 2

// The physical layer transmitted a GRE encapsulated packet, with the length 128 and
encapsulation type IPv6.
*May 15 15:29:06:552 2007 Sysname GRE/7/debug:
gre packet: Decapsulate tunnel packet
Outer packet header 1.1.1.2->1.1.1.1(length = 128)
// GRE de-encapsulated a tunnel packet. Before de-encapsulation, the source and destination
addresses of the packet are 1.1.1.2 and 1.1.1.1 respectively, and the packet length is 128.
*May 15 15:29:06:599 2007 Sysname GRE/7/debug:
Tunnel0 packet: After decapsulation,
Outgoing packet header 0111::0002->0111::0001(length = 104)
Request time out
// After de-encapsulation, the source and destination addresses of a packet are 0111::0002 and
0111::0001, respectively, and the packet length is 104.
--- 111::2 ping statistics ---
1 packet(s) transmitted
0 packet(s) received
100.00% packet loss
round-trip min/avg/max = 0/0/0 ms
# On the peer device, create a GRE tunnel, and configure parameters to make the tunnel interface
go up. On the local device, create no tunnel interface, and enable GRE error debugging. The
following debugging information is output when a GRE packet is received.
<Sysname> debugging gre error
*Aug 7 07:15:44:757 2008 Sysname GRE/7/debug:
gre error: No tunnel or tunnel in up state exists. Dropped the packet.
// The device is not configured with a tunnel or the tunnel is not up, so GRE packets will be
dropped without being decapsulated.
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On multi-core devices:
# On two devices, enable IPv6 globally, create a GRE tunnel between the two devices, and
configure related parameters to make the tunnel interfaces go up. Then, enable debugging for
GRE packets on the local device. Ping the tunnel destination address.
<Sysname> debugging gre packet
*Mar 6 11:37:32:937 2008 Sysname DPGRE/7/debug:
Tunnel0 packet: Before encapsulation,
packet header 1::1->22::2(length = 104).
// Before a packet is encapsulated on the interface Tunnel0, the source and destination addresses
of the packet are 1:: 1 and 22::2, respectively, and the packet length is 104.
*Mar 6 11:37:32:937 2008 Sysname DPGRE/7/debug:
Tunnel0 packet: After encapsulation,
outgoing packet header 2.1.1.1->2.1.1.2(length = 128).
// After encapsulation, the source and destination addresses of the packet are 2.1.1.1 and
2.1.1.2, respectively, and the packet length is 128.
*Mar 6 11:37:32:937 2008 Sysname DPGRE/7/debug:
packet: Before decapsulation,
packet header 2.1.1.2->2.1.1.1(length = 128).
// GRE de-encapsulated a tunnel packet. Before de-encapsulation, the source and destination
addresses of the packet are 2.1.1.2 and 2.1.1.1, respectively, and the packet length is 128.
*Mar 6 11:37:32:937 2008 Sysname DPGRE/7/debug:
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