In routine maintenance, you can run the following commands
in any view to check:
GRE running status
Whether GRE tunnel interfaces are Up
Whether error packets exist
Whether packets are properly forwarded to the destination address
through the tunnel interface
Procedure
Run the display interface tunnel command to view the running status of the tunnel interface.
Run the display ip routing-table command to view the IPv4 routing table and check whether
the outbound interface for a route to the specified destination address
is a tunnel interface.
Run the display ipv6 routing-table command to view the IPv6 routing table and check whether
the outbound interface for a route to the specified destination address
is a tunnel interface.
Run the display ip routing-tablevpn-instance vpn-instance command to check VPN routing information on the tunnel interface.
When a tunnel interface is bound to a VPN instance, specify
a VPN instance to check the VPN routing information.