Alcatel-Lucent OmniSwitch 9900 Series Network Configuration Manual page 385

Configuring IPv6
Configuring IPv6 Tunnel Interfaces
There are two types of tunnels supported, 6to4 and configured. Both types facilitate the interaction of IPv6
networks with IPv4 networks by providing a mechanism for carrying IPv6 traffic over an IPv4 network
infrastructure. This is an important function since it is more than likely that both protocols will need to
coexist within the same network for some time.
A 6to4 tunnel is configured by creating an IPv6 6to4 tunnel interface on a router. This interface is then
assigned an IPv6 address with an embedded well-known 6to4 prefix (e.g., 2002) combined with an IPv4
local address. This is all done using the
interface named "tunnel_6to4" is automatically created, enter the following commands to create a 6to4
tunnel interface:
-> ipv6 address 2002:c633:6489::254/16 tunnel_6to4
-> ipv6 interface tunnel_6to4 admin-state enable
In the above example, 2002 is the well-known prefix that identifies a 6to4 tunnel. The C633:6489 part of
the address that follows 2002 is the hex equivalent of the IPv4 address 198.51.100.137. Note that an IPv4
interface configured with the embedded IPv4 address is required on the switch. In addition, do not
configure a private (e.g., 192.168.10.1), broadcast, or unspecified address as the embedded IPv4 address.
One of the main benefits of 6to4 tunneling is that no other configuration is required to identify tunnel
endpoints. The router that the 6to4 tunnel interface is configured on will encapsulate IPv6 packets in IPv4
headers and send them to the IPv4 destination address where they will be processed. This is particularly
useful in situations where the IPv6 host is isolated.
The second type of tunnel supported is referred to as a configured tunnel. With this type of tunnel it is
necessary to specify an IPv4 address for the source and destination tunnel endpoints. Note that if
bidirectional communication is desired, then it is also necessary to create the tunnel interface at each end
of the tunnel.
Creating an IPv6 configured tunnel involves the following general steps:
•
Create an IPv6 tunnel interface using the
•
Associate an IPv4 source and destination address with the tunnel interface by using the
command. These addresses identify the tunnel endpoints.
•
Associate an IPv6 address with the tunnel interface by using the
•
Configure a tunnel interface and associated addresses at the other end of tunnel.
The following example commands create the v6if-tunnel-137 configured tunnel:
-> ipv6 interface v6if-tunnel-137 tunnel 1
-> ipv6 interface v6if-tunnel-137 tunnel source 198.51.100.137 destination
192.0.2.195
-> ipv6 address 2100:db8:4132:4000::/64 eui-64 v6if-tunnel-137
-> ipv6 interface v6if-tunnel-137 admin-state enable
Note that dynamic routing protocols are not supported over 6to4 tunnels, but are allowed over configured
tunnels. To use this protocol on a configured tunnel, a dynamic routing protocol interface is created for the
tunnel interface. For example, the following command creates a RIPng interface for tunnel v6if-tunnel-
137:
-> ipv6 rip interface v6if-tunnel-137
OmniSwitch AOS Release 8 Network Configuration Guide
ipv6 interface and ipv6 address
ipv6 interface command.
December 2017
Configuring IPv6 Tunnel Interfaces
commands. Since a 6to4
ipv6 interface
ipv6 address command.
page 17-17