Edge-Core ECS2100-10T Reference Manual page 685

Command Usage
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When a non-default value is configured, the specified interval is used both for
router advertisements and by the router itself.
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This command 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.
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Setting the neighbor solicitation interval to 0 means that the configured time is
unspecified by this router.
Example
The following sets the interval between sending neighbor solicitation messages to
30000 milliseconds:
Console(config)#interface vlan 1
Console(config)#ipv6 nd ns-interval 30000
Console(config)#end
Console#show ipv6 interface
VLAN 1 is up
IPv6 is enabled
Link-local address:
fe80::200:e8ff:FE90:0/64
Global unicast address(es):
2009:db9:2229::79, subnet is 2009:db9:2229:0::/64
Joined group address(es):
ff01::1/16
ff02::1/16
ff02::1:ff00:79/104
ff02::1:ff90:0/104
IPv6 link MTU is 1500 bytes.
ND DAD is enabled, number of DAD attempts: 5.
ND retransmit interval is 1000 milliseconds
ND advertised retransmit interval is 0 milliseconds
ND reachable time is 30000 milliseconds
ND advertised reachable time is 0 milliseconds
ND advertised router lifetime is 1800 seconds
Console#
Related Commands
show running-config (94)
Chapter 27
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| IP Interface Commands
IPv6 Interface