Technical data

FastIron Ethernet Switch Administration Guide 155
53-1002637-02
IPv6 over IPv4 tunnels
5
IPv6 over IPv4 tunnel configuration notes
• The local tunnel configuration must include both source and destination addresses.
• The remote side of the tunnel must have the opposite source/destination pair.
• A tunnel interface supports static and dynamic IPv6 configuration settings and routing
protocols.
• Duplicate Address Detection (DAD) is not currently supported with IPv6 tunnels. Make sure
tunnel endpoints do not have duplicate IP addresses.
• Neighbor Discovery (ND) is not supported with IPv6 tunnels.
• If a tunnel source port is a multi-homed IPv4 source, the tunnel will use the first IPv4 address
only. For proper tunnel operation, use the ip address option.
Configuring a manual IPv6 tunnel
You can use a manually configured tunnel to connect two isolated IPv6 domains. You should deploy
this point-to-point tunnelling mechanism if you need a permanent and stable connection.
To configure a manual IPv6 tunnel, enter commands such as the following on a Layer 3 Switch
running both IPv4 and IPv6 protocol stacks on each end of the tunnel.
Brocade(config)#interface tunnel 1
Brocade(config-tnif-1)#tunnel source ethernet 1/3/1
Brocade(config-tnif-1)#tunnel destination 10.162.100.1
Brocade(config-tnif-1)#tunnel mode ipv6ip
Brocade(config-tnif-1)#ipv6 enable
This example creates tunnel interface 1 and assigns a link local IPv6 address with an automatically
computed EUI-64 interface ID to it. The IPv4 address assigned to Ethernet interface 1/3/1 is used
as the tunnel source, while the IPv4 address 10.168.100.1 is configured as the tunnel destination.
The tunnel mode is specified as a manual IPv6 tunnel. Finally, the tunnel is enabled. Note that
instead of entering ipv6 enable, you could specify an IPv6 address, for example, ipv6 address
2001:DB8:384d:34::/64 eui-64, which would also enable the tunnel.
Syntax: [no] interface tunnel number
For the number parameter, specify a value between 1–8.
Syntax: [no] tunnel source ipv4-address | ethernet port | loopback number | ve number
The tunnel source can be an IP address or an interface.
For ipv4-address, use 8-bit values in dotted decimal notation.
The ethernet | loopback | ve parameter specifies an interface as the tunnel source. If you specify
an Ethernet interface, also specify the port number associated with the interface. If you specify a
loopback, VE, or interface, also specify the loopback, VE, or number, respectively.
Syntax: [no] tunnel destination ipv4-address
Specify the ipv4-address parameter using 8-bit values in dotted decimal notation.
Syntax: [no] tunnel mode ipv6ip
ipv6ip indicates that this is an IPv6 manual tunnel.