H3C Technologies H3C SecPath F1000-E - Manual (Page 754)

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Figure 20 Tunnel list
Table 5 describes the fields of the P2MP GRE tunnel list.
Table 5 Fields of the P2MP GRE tunnel list
Field Description
Tunnel Interface Name of the tunnel interface
Tunnel Dest Address IP address of the tunnel destination
Branch Network
Address/Mask
IP address and mask of the branch network
GRE Key
GRE key of the tunnel, used to identify the priority of the tunnel entry. If the tunnel
peer device is not configured with a GRE key, nothing will be displayed for this
field.
P2MP GRE Tunnel Configuration Examples
Basic P2MP GRE Tunnel Configuration Example
Network requirements
A company has a network at the headquarters and each of its branches. It is required to implement
communication between the headquarters and the branches through GRE.
Figure 21 shows a simplified
scenario, where there is only one branch.
• Device A is the gateway at the headquarters, and Device B is the gateway of the branch.
• Host A is an internal user at the headquarters and Host B is an internal user at the branch. A GRE
tunnel is established between Device A and Device B to implement communication between Host A
and Host B.
If you use P2P GRE tunnels, the number of GRE tunnels to be configured is the same as that of the
branches. To simplify the configuration at the headquarters, you can create a P2MP GRE tunnel interface
on Device A, and configure a GRE over IPv4 tunnel interface on Device B.
NOTE:
This example gives only the configuration on Device B. The configuration on other branch gateways is
similar.