Checking The Configuration - Huawei AR1200 series Configuration Manual

Huawei AR1200 Series Enterprise Routers
Configuration Guide - VPN
The tunnel interface view is displayed.
Step 3 Run:
gre checksum
End-to-end checksum authentication is configured for the tunnel.
By default, end-to-end checksum authentication is disabled.
Step 4 Run:
gre key key-number
The key is set for the tunnel interface.
If the keys are set for tunnel interfaces on the two ends of the tunnel, ensure that they have the
same key number. Alternatively, you may choose not to set the keys for tunnel interfaces on
both ends of the tunnel.
By default, no key is configured for the tunnel.
Step 3 and Step 4 can be performed in random order.
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1.3.5 Checking the Configuration

After a GRE tunnel is set up, you can view the running status and routing information about the
tunnel interface.
Context
The configurations of the GRE function are complete.
Procedure
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l
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Example
Run the display interface tunnel command. If the tunnel interface is Up, the configuration
succeeds. For example:
<Huawei> display interface Tunnel 0/0/1
Tunnel0/0/1 current state : UP
Line protocol current state : UP
Description:HUAWEI, AR Series, Tunnel0/0/1 Interface
Route Port,The Maximum Transmit Unit is 1500
Internet Address is 5.5.5.2/24
Encapsulation is TUNNEL, loopback not set
Tunnel source 150.1.1.1 (Ethernet4/0/0), destination 150.1.1.2
Tunnel protocol/transport GRE/IP, key disabled
keepalive disabled
Checksumming of packets disabled
Issue 01 (2012-04-20)
NOTE
Run the display interface tunnel [ interface-number ] command to check tunnel interface
information.
Run the display ip routing-table command to check the IPv4 routing table.
Run the ping -a source-ip-address host command to check whether the two ends of the
tunnel can successfully ping each other.
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1 GRE Configuration
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