Brocade FastIron Ethernet Switch Administration Guide - Manual (Page 130)

Syntax: [no] ipv6 route vrf vrf-name dest-ipv6-prefix/prefix-length next-hop-ipv6-address
The dest-ip-addr is the route’s destination. The dest-mask is the network mask for the route’s
destination IPv6 address.
The vrf-name is the name of the VRF that contains the next-hop router (gateway) for the route.
The next-hop-ip-addr is the IPv6 address of the next-hop router (gateway) for the route.
NOTE
The vrf needs to be a valid VRF to be used in this command.
IPv6 over IPv4 tunnels
NOTE
This feature is supported only with the IPv6 Layer 3 license on FSX devices and the full Layer 3 image
on other devices.
To enable communication between isolated IPv6 domains using the IPv4 infrastructure, you can
manually configure IPv6 over IPv4 tunnels that provide static point-point connectivity.
As shown in the following illustration, these tunnels encapsulate an IPv6 packet within an IPv4 packet.
FIGURE 2 IPv6 over an IPv4 tunnel
In general, a manually configured tunnel establishes a permanent link between switches in IPv6
domains. A manually configured tunnel has explicitly configured IPv4 addresses for the tunnel source
and destination.
This tunneling mechanism requires that the Layer 3 switch at each end of the tunnel run both IPv4 and
IPv6 protocol stacks. The Layer 3 switches running both protocol stacks, or dual-stack routers, can
interoperate directly with both IPv4 and IPv6 end systems and routers. Refer to "Configuring IPv4 and
IPv6 protocol stacks" section in the FastIron Ethernet Switch Administration Guide.
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.
IPv6 over IPv4 tunnels
130 FastIron Ethernet Switch Administration Guide
53-1003075-02