Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 191)

Syntax: [no] ipv6 mtu bytes
For bytes, specify a value between 1280 - 1500, or 1280 - 10218 if jumbo mode is enabled. For ICX
6610 and ICX 6450 devices, you can specify a value between 1280 and 10200.If a non-default value is
configured for an interface, router advertisements include an MTU option.
NOTE
IPv6 MTU cannot be configured globally. It is supported only on devices running Layer 3 software.
Static neighbor entries configuration
In some special cases, a neighbor cannot be reached using the neighbor discovery feature. In this
situation, you can add a static entry to the IPv6 neighbor discovery cache, which causes a neighbor to
be reachable at all times without using neighbor discovery. (A static entry in the IPv6 neighbor discovery
cache functions like a static ARP entry in IPv4.)
NOTE
A port that has a statically assigned IPv6 entry cannot be added to a VLAN.
NOTE
Static neighbor configurations will be cleared on secondary ports when a trunk is formed.
For example, to add a static entry for a neighbor with the IPv6 address 2001:DB8:2678:47b and link-
layer address 0000.002b.8641 that is reachable through Ethernet interface 3/1, enter the ipv6 neighbor
command.
device(config)#ipv6 neighbor 2001:DB8:2678:47b ethernet 3/1 0000.002b.8641
Syntax: [no] ipv6 neighbor ipv6-address ethernet port | veve-number [ ethernet port ] link-layer-
address
The ipv6-address parameter specifies the address of the neighbor.
The ethernet | ve parameter specifies the interface through which to reach a neighbor. If you specify an
Ethernet interface, specify the port number of the Ethernet interface. If you specify a VE, specify the VE
number and then the Ethernet port numbers associated with the VE. The link-layer address is a 48-bit
hardware address of the neighbor.
If you attempt to add an entry that already exists in the neighbor discovery cache, the software changes
the already existing entry to a static entry.
To remove a static IPv6 entry from the IPv6 neighbor discovery cache, use the no form of this
command.
Static neighbor entries configuration
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