328
# From Router B, ping the IP address of GigabitEthernet 2/0/1 on Router A.
[RouterB] ping -a 10.1.3.1 10.1.1.1
Ping 10.1.1.1 (10.1.1.1) from 10.1.3.1: 56 data bytes, press CTRL_C to break
56 bytes from 10.1.1.1: icmp_seq=0 ttl=255 time=11.000 ms
56 bytes from 10.1.1.1: icmp_seq=1 ttl=255 time=1.000 ms
56 bytes from 10.1.1.1: icmp_seq=2 ttl=255 time=0.000 ms
56 bytes from 10.1.1.1: icmp_seq=3 ttl=255 time=0.000 ms
56 bytes from 10.1.1.1: icmp_seq=4 ttl=255 time=0.000 ms
--- Ping statistics for 10.1.1.1 ---
5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.000/2.400/11.000/4.317 ms
The output shows that Router B can successfully ping Router A.
Configuring an IPv4 over IPv6 GRE tunnel
Network requirements
Two IPv4 subnets Group 1 and Group 2 are connected to an IPv6 network. Create a GRE/IPv6
tunnel between Router A and Router B, so the two IPv4 subnets can communicate with each other
through the GRE tunnel over the IPv6 network.
Figure 138 Network diagram
Configuration procedure
Before performing the following configuration, configure an IP address for each interface, and make
sure Router A and Router B can reach each other.
1. Configure Router A:
# Create a tunnel interface Tunnel 0, and specify the tunnel mode as GRE/IPv6.
<RouterA> system-view
[RouterA] interface tunnel 0 mode gre ipv6
# Configure an IP address for the tunnel interface.
[RouterA-Tunnel0] ip address 10.1.2.1 255.255.255.0
# Configure the source address of the tunnel interface as the IP address of interface
GigabitEthernet 2/0/2 on Router A.
[RouterA-Tunnel0] source 2002::1:1
# Configure the destination address of the tunnel interface as the IP address of interface
GigabitEthernet 2/0/2 on Router B.
[RouterA-Tunnel0] destination 2001::2:1
[RouterA-Tunnel0] quit
# Configure a static route from Router A through the tunnel interface to Group 2.
[RouterA] ip route-static 10.1.3.0 255.255.255.0 tunnel 0
2. Configure Router B:
# Create a tunnel interface Tunnel 0, and specify the tunnel mode as GRE/IPv6.
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