Huawei v200r001 user manual Troubleshooting GRE

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

RouterB(config-if-tunnel0)# tunnel destination 192.13.2.1

!Configure a static route to Group1. RouterB(config)# ipx route 1e 1f.b.b.b 30000 15

3.5Troubleshooting GRE

As GRE configuration is relatively simple, only the consistency of the configuration needs to be noted. Here, analyze a relative error, as shown in the following figure:

Fault 1: The interfaces at both ends of the tunnel are properly configured and both ends of the tunnel can be “pinged” through, but PC A and PC B can not be “pinged” through.

Troubleshooting: In this case, mainly check whether there is a route passing through tunnel interface. That is, at RouterA, a route to 10.2.0.0/16 passes through Tunnel0 interface; at RouterB, a route to 10.1.0.0/16 passes through Tunnel0 interface (fulfilled by adding static route).

		Router A	Router C	Router B
PC A	10.1.1.1	Serial0		Serial1	PC B	10.2.1.1

tunnel

Figure VPN-3-7Networking group of GRE troubleshooting example

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