C
HAPTER
45
| IP Interface Commands
ND Snooping
– 1434 –
ipv6 nd snooping
auto-detect
retransmit interval
This command sets the interval between which the auto-detection process
sends NS messages 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 interval
retransmit-interval
no ipv6 nd snooping auto-detect retransmit interval
retransmit-interval – The interval between which the switch sends
an NS message to determine if a client still exists. (Range: 1-10
seconds)
DEFAULT SETTING
1 second
COMMAND MODE
Global Configuration
COMMAND USAGE
The timeout after which the switch will delete a dynamic user binding if no
RA message is received is set to the retransmit count (see the ipv6 nd
snooping auto-detect retransmit count command) x the retransmit
interval. Based on the default settings, this is 3 seconds.
EXAMPLE
Console(config)#ipv6 nd snooping auto-detect retransmit interval 5
Console(config)#
ipv6 nd snooping
prefix timeout
This command sets the time to wait for an RA message before deleting an
entry in the prefix table. Use the no form to restore the default setting.
SYNTAX
ipv6 nd snooping prefix timeout timeout
no ipv6 nd snooping prefix timeout
timeout – The time to wait for an RA message to confirm that a
prefix entry is still valid. (Range: 3-1800 seconds)
DEFAULT SETTING
Set to the valid lifetime field in received RA packet
COMMAND MODE
Global Configuration
COMMAND USAGE
If ND snooping is enabled and an RA message is received on a trusted
interface, the switch will add an entry in the prefix table based upon the
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