Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 854)

824 Multi-Service IronWare Switching Configuration Guide
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IPv6 Over IPv4 tunnels in hardware
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Examples
To remove a user defined Martian address or a system default Martian address, use the “no” form
of the command.
Brocade(config)# no ip martian 0.0.0.0/8
The following example configuration, creates a “hole” for 192.168.1.0/24 in the martian address
192.168.0.0/16.
Brocade(config)# ip martian 192.168.1.0/24 permit
Brocade(config)# ip martian 192.168.0.0/16
To display the currently configured Martian addresses refer to “Displaying martian addressing
information” .
IPv6 Over IPv4 tunnels in hardware
To enable communication between the isolated IPv6 domains using the IPv4 infrastructure, you
can configure IPv6 over IPv4 tunnels.
NOTE
The Brocade NetIron CES and Brocade NetIron CER currently do not support IPv6 over IPv4
tunneling.
Brocade devices support the following IPv6 over IPv4 tunneling in hardware mechanisms:
• Manually configured tunnels
• Automatic 6to4 tunnels
In general, a manually configured tunnel establishes a permanent link between routers in IPv6
domains, while the automatic tunnels establish a transient link that is created and taken down on
an as-needed basis. (Although the feature name and description may imply otherwise, some
configuration is necessary to set up an automatic tunnel.) Also, a manually configured tunnel has
explicitly configured IPv4 addresses for the tunnel source and destination, while the automatic
tunnels have an explicitly configured IPv4 address for the tunnel source and an automatically
generated address for the tunnel destination.
These tunneling mechanisms require that the router at each end of the tunnel run both IPv4 and
IPv6 protocol stacks. The routers running both protocol stacks, or dual-stack routers, can
interoperate directly with both IPv4 and IPv6 end systems and routers.
The following features are not supported for IPv6 tunnel configuration at this time:
• Keep-alive
• Hitless upgrade
• Tunnels over MPLS or GRE
Configuring a IPv6 IP tunnel
To configure a IPv6 IP Tunnel, configure the following parameters:
• CAM Restrictions
• Maximum Number of Tunnels (optional)