Routes for a tunnel must be available on both the source and destination devices so that packets encapsulated with GRE can be forwarded correctly.
Packets can be properly forwarded over an IPv6 GRE tunnel only if the local and remote devices both have routes that are advertised over the tunnel. Currently, only static routes can be advertised over an IPv6 GRE tunnel. A static route must be configured on both the source and destination devices. The destination address of the static route is neither the destination address of the tunnel nor the address of the destination tunnel interface. Instead, it is the destination address of the packet that is not encapsulated using IPv6 GRE. The outbound interface must be the tunnel interface at the local end.
Perform the following steps on the routers at both ends of the tunnel:
The system view is displayed.
If an IPv4 address is configured for the tunnel interface:
Run the ip route-static dest-ip-address { mask | mask-length } tunnel interface-number [ description text ] command to configure an IPv4 static route.
If an IPv6 address is configured for the tunnel interface:
Run the ipv6 route-static dest-ipv6-address prefix-length { interface-type interface-number [ nexthop-ipv6-address ] | vpn-instance vpn-instance-name nexthop-ipv6-address | nexthop-ipv6-address } [ description text ] command to configure an IPv6 static route.
The configuration is committed.