Huawei v200r001 user manual Setting the Network Address of Tunnel Interface

User Manual - Configuration Guide (Volume 3)	Chapter 3
Versatile Routing Platform	Configuration of GRE

3.2.5 Setting the Network Address of Tunnel Interface

Configure network address of tunnel interface so that the channel supports dynamic routing protocol. The users are recommended to set the network addresses at both ends of the channel to be in the same network segment.

Perform the following setting in tunnel interface configuration mode.

Table VPN-3-4Set the network address of tunnel interface

Operation	Command
Set the IP address of tunnel interface.	ip address ip-address mask
Delete the IP address of tunnel interface.	no ip address
Set the IPX address of tunnel interface.	ipx network network-number
Delete the IPX address of tunnel interface.	no ipx network

3.2.6 Setting the Encapsulation Mode of Tunnel Interface Message

Please configure in tunnel interface configuration mode as below.

Table VPN-3-5Set the encapsulation mode of tunnel interface message

Operation	Command
Set the encapsulation mode of tunnel interface message.	tunnel mode gre ip

The encapsulation mode of tunnel interface message is GRE IP by default.

3.2.7 Setting the Identification Key Word of Tunnel Interface

It is stipulated in RFC 1701 that: if the KEY field of GRE header is set, the receiving side and transmitting side will check the identification key word of the channel. Only when the set identification key words at both ends of the tunnel are totally identical, can the check pass, or the message will be discarded.

Perform the configuration in tunnel interface configuration mode.

Table VPN-3-6Set the identification key word of tunnel interface

Operation	Command
Set the identification key word of tunnel interface.	tunnel key key-number
Cancel the identification key word of tunnel interface.	no tunnel key

By default, the tunnel does not use KEY, an integer ranging 0 to 4294967295.

3.2.8 Setting Tunnel Interface to Check with Check Sum

It is stipulated in RFC 1701 that: if the “Checksum” place of GRE header is set, the check sum is valid. The transmitting side calculates the check sums of GRE header and payload. The receiving side calculates the check sum of the received message and

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