HP VPN Firewall Appliances VPN Command Reference

2
gre checksum
Use gre checksum to enable the GRE packet checksum function. This function verifies the validity of
packets and discards invalid packets.
Use undo gre checksum to disable the GRE packet checksum function.
Syntax
gre checksum
undo gre checksum
Default
The GRE packet checksum function is disabled.
Views
Tunnel interface view
Default command level
2: System level
Examples
# Enable the GRE packet checksum function for the tunnel between device Sysname1 and device
Sysname2.
// Enable the GRE packet checksum function on device Sysname1.
<Sysname1> system-view
[Sysname1] interface tunnel 3
[Sysname1-Tunnel3] gre checksum
// Enable the GRE packet checksum function on device Sysname2.
<Sysname2> system-view
[Sysname2] interface tunnel 2
[Sysname2-Tunnel2] gre checksum
Related commands
• interface tunnel
• display interface tunnel
gre key
Use gre key to configure a key for a GRE tunnel interface.
Use undo gre key to remove the configuration.
Syntax
gre key key-number
undo gre key
Default
No key is configured for a GRE tunnel interface.