Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 439)

Multi-Service IronWare Routing Configuration Guide 411
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Configuring the management port for an IPv6 automatic address configuration
Configuring IPv6 127 bit mask address
With 127 bit mask we will have 127 bits in the network part of the address, and 1 bit in the host
part of the address. With 1 bit in the host part, we can have only two IPv6 addresses, one for each
host. With 127 bit mask we consider 0 and 1 as host address and eliminates subnet-anycast for
the configured network from that link.
NOTE
The 127 bit mask address supports only inter-router Point-to-Point links.
Benefits of using 127 bit mask:
• Eliminates the Ping-pong issue
• Reduces the impact of Denial of Service (DOS) attacks
• Saves IPv6 address space
For example, the following commands configure an 127 bit mask IPv6 address:
Brocade(config)# interface ethernet 1/1
Brocade(config-if-e10000-1/1)#enable
Brocade(config-if-e10000-1/1)#vrf forwarding green
Brocade(config-if-e10000-1/1)#ipv6 address 10:1:1::1/127
Brocade(config-if-e10000-1/1)#ipv6 enable
Brocade(config-if-e10000-1/1)#ipv6 ospf area 0
Brocade(config)# interface ethernet 1/2
Brocade(config-if-e10000-1/2)#enable
Brocade(config-if-e10000-1/2)#ip address 8.8.8.1/24
Brocade(config-if-e10000-1/2)#ipv6 address 1:1:1:1:1::/127
Brocade(config-if-e10000-1/2)#ipv6 enable
Configuring the management port for an IPv6 automatic address
configuration
You can configure the management port to automatically obtain an IPv6 address. The process is
the same for all ports and is described in detail in the
“Configuring a global or unique local IPv6
unicast address with an automatically computed EUI-64 interface ID” on page 409
IPv6 host support
You can configure the device to be an IPv6 host. An IPv6 host has interfaces with IPv6 addresses,
but does not have IPv6 routing enabled.
This section lists supported and unsupported IPv6 host features.
IPv6 host supported features
The following IPv6 host features are supported:
• Automatic address configuration