R3303-HP HSR6800 Routers Layer 3 - IP Services Command Reference

302
gre p2mp branch-network-mask
Use gre p2mp branch-network-mask to configure the mask or mask length of the private network
addresses of a branch in tunnel entries.
Use undo gre p2mp branch-network-mask to restore the default.
Syntax
gre p2mp branch-network-mask { mask | mask-length }
undo gre p2mp branch-network-mask
Default
The mask of the private network addresses of a branch is 255.255.255.255, and the mask length is 32.
Views
Tunnel interface view
Default command level
2: System level
Parameters
mask: Specifies the mask of the private network IP addresses of the branch, in dotted decimal notation.
mask-length: Specifies the mask length of the private network IP addresses of the branch, in the range of
0 to 32.
Usage guidelines
After you configure a mask length with this command, the node at the headquarters establishes only one
tunnel entry for private IP addresses in the same subnet, therefore reducing the number of tunnel entries
on the node at the headquarters and allowing branches to initiate establishment of tunnels by sending
emulated data to the node at the headquarters.
This command is available only for P2MP GRE tunnel interfaces.
Modifying the mask will delete all tunnel entries created on the device. Therefore, execution of this
command requires your confirmation.
To use this command, make sure all the branch networks of the enterprise have the same mask length.
Otherwise, packet forwarding errors might occur. For a branch device with a different mask length, you
can configure NAT to make sure that after address translation the mask length of the branch meets the
consistency requirement.
Examples
# Configure the mask of the private network addresses of a branch as 255.255.255.0.
<Sysname> system-view
[Sysname] interface tunnel 0
[Sysname-Tunnel0] gre p2mp branch-network-mask 255.255.255.0
Warning: All tunnel table will be deleted. Continue? [Y/N]:
# Configure the mask length of the private network addresses of a branch as 23.
<Sysname> system-view
[Sysname] interface tunnel 0
[Sysname-Tunnel0] gre p2mp branch-network-mask 23
Warning: All tunnel table will be deleted. Continue? [Y/N]: