Hardware Tunnel Support
The platforms and software versions that provide hardware forwarding support for IPv6
traffic for both IPv6-in-IPv4 and 6to4 tunnels for various platforms are shown in the
following table. In all the other platforms, tunnel traffic is forwarded in software and
the statistics can be viewed from the
show ipstats ipv6
command.
Note
The MTU for IPv6 Tunnels is set to 1480 bytes, and is not
user-configurable. Configuring jumbo frames has no effect on the MTU size for
IPv6 tunnels.