Chapter 27
| IP Interface Commands
ND Snooping
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Console(config)#ipv6 nd snooping
Console(config)#ipv6 nd snooping vlan 1
Console(config)#
ipv6 nd snooping
auto-detect
This command enables automatic validation of dynamic user binding table entries
by periodically sending NS messages and awaiting NA replies. Use the no form to
disable this feature.
Syntax
[no] ipv6 nd snooping auto-detect
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
If auto-detection is enabled, the switch periodically sends an NS message to
determine is a client listed in the dynamic binding table still exists. If it does not
receive an RA message in response after the configured timeout, the entry is
dropped. If the switch receives an RA message before the timeout expires, it resets
the lifetime for the dynamic binding, and the auto-detection process resumes.
Example
Console(config)#ipv6 nd snooping auto-detect
Console(config)#
ipv6 nd snooping
auto-detect
retransmit count
This command sets the number of times the auto-detection process sends an NS
message to determine if a dynamic user binding is still valid. Use the no form to
restore the default setting.
Syntax
ipv6 nd snooping auto-detect retransmit count retransmit-times
no ipv6 nd snooping auto-detect retransmit count
retransmit-times – The number of times to send an NS message to
determine if a client still exists. (Range: 1-5)
Default Setting
3
Command Mode
Global Configuration
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