ECS4110-28T_Management Guide

C HAPTER 16 | IP Configuration
Setting the Switch’s IP Address (IP Version 6)
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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.
◆ 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: 3000 milliseconds is used for neighbor discovery operations,
0 milliseconds is advertised in router advertisements.
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The time limit configured by this parameter allows the router to
detect unavailable neighbors. During the neighbor discover process,
an IPv6 node will multicast neighbor solicitation messages to search
for neighbor nodes. For a neighbor node to be considered
reachable, it must respond to the neighbor soliciting node with a
neighbor advertisement message to become a confirmed neighbor,
after which the reachable timer will be considered in effect for
subsequent unicast IPv6 layer communications.
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This time limit is included in all router advertisements sent out
through an interface, ensuring that nodes on the same link use the
same time value.
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Setting the time limit to 0 means that the configured time is
unspecified by this router.
◆ 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