Web Management Guide-R05

Chapter 14 | IP Configuration
Setting the Switch’s IP Address (IP Version 6)
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Duplicate address detection is stopped on any interface that has been
suspended (see “Configuring VLAN Groups” on page 152). 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.
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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” state. If no duplicate link-local address is found,
duplicate address detection is started for the remaining IPv6 addresses.
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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.
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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
neighbor. Therefore, avoid using very short intervals for normal IPv6
operations.
When a non-default value is configured, the specified interval is used both for
router advertisements and by the router itself.
◆ ND Reachable-Time – The amount of time that a remote IPv6 node is
considered reachable after some reachability confirmation event has occurred.
(Range: 0-3600000 milliseconds; Default: 30000 milliseconds)
◆ Restart DHCPv6 – When DHCPv6 is restarted, the switch may attempt to
acquire an IP address prefix through stateful address autoconfiguration. If the
router advertisements have the “other stateful configuration” flag set, the
switch may also attempt to acquire other non-address configuration
information (such as a default gateway) when DHCPv6 is restarted.
Prior to submitting a client request to a DHCPv6 server, the switch should be
configured with a link-local address using the Address Autoconfig option. The
state of the Managed Address Configuration flag (M flag) and Other Stateful
Configuration flag (O flag) received in Router Advertisement messages will
determine the information this switch should attempt to acquire from the
DHCPv6 server as described below.