LevelOne GEL-5261, User Manual

Page: 506 / 570

– 506 –
Chapter 16
| IP Configuration
Setting the Switch’s IP Address (IP Version 6)
■
If a non-default value is configured, an MTU option is included in the router
advertisements sent from this device. This option is provided to ensure that
all nodes on a link use the same MTU value in cases where the link MTU is
not otherwise well known.
■
IPv6 routers do not fragment IPv6 packets forwarded from other routers.
However, traffic originating from an end-station connected to an IPv6
router may be fragmented.
■
All devices on the same physical medium must use the same MTU in order
to operate correctly.
■
IPv6 must be enabled on an interface before the MTU can be set. If an IPv6
address has not been assigned to the switch,
“N/A” is displayed in the MTU
field.
◆ ND DAD Attempts – The number of consecutive neighbor solicitation
messages sent on an interface during duplicate address detection.
(Range: 0-600, Default: 3)
■
Configuring a value of 0 disables duplicate address detection.
■
Duplicate address detection determines if a new unicast IPv6 address
already exists on the network before it is assigned to an interface.
■
Duplicate address detection is stopped on any interface that has been
suspended (see
“Configuring VLAN Groups” on page 149 ). While an
interface is suspended, all unicast IPv6 addresses assigned to that interface
are placed in a “pending” state. Duplicate address detection is
automatically restarted when the interface is administratively re-activated.
■
An interface that is re-activated restarts duplicate address detection for all
unicast IPv6 addresses on the interface. While duplicate address detection
is performed on the interface’s link -local address, the other IPv6 addresses
remain in a “tentative” s tate. If no duplicate link-local address is found,
duplicate address detection is started for the remaining IPv6 addresses.
■
If a duplicate address is detected, it is set to “duplicate” state, and a warning
message is sent to the console. If a duplicate link-local address is detected,
IPv6 processes are disabled on the interface. If a duplicate global unicast
address is detected, it is not used. All configuration commands associated
with a duplicate address remain configured while the address is in
“duplicate” state.
■
If the link-local address for an interface is changed, duplicate address
detection is performed on the new link-local address, but not for any of the
IPv6 global unicast addresses already associated with the interface.
◆ ND NS Interval – The interval between transmitting IPv6 neighbor solicitation
messages on an interface. (Range: 1000-3600000 milliseconds)
Default: 1000 milliseconds is used for neighbor discovery operations,
0 milliseconds is advertised in router advertisements.
This attribute specifies the interval between transmitting neighbor solicitation
messages when resolving an address, or when probing the reachability of a