H3C Technologies H3C S12500 Series Switches - Manual (Page 128)

115
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure the maximum
number of neighbors that the
interface can learn.
ipv6 neighbors
max-learning-num number
By default, the maximum of
neighbors that an Ethernet interface
can learn dynamically is the
maximum capacity of the system.
264B
Setting the aging timer for ND entries in stale state
ND entries in stale state have an aging timer. If an ND entry in stale state is not refreshed before the timer
expires, the ND entry changes to the delay state. If it is still not refreshed in 5 seconds, the ND entry
changes to the probe state, and the device sends an NS message three times. If no response is received,
the device removes the ND entry.
To set the aging timer for ND entries in stale state:
Step Command Remarks
1. Enter system view. system-view N/A
2. Set the aging timer for ND
entries in stale state.
ipv6 neighbor stale-aging aging-time The default setting is four hours.
265B
Minimizing link-local ND entries
Perform this task to minimize link-local ND entries assigned to the driver. Link-local ND entries refer to ND
entries comprising link-local addresses.
By default, the device assigns all ND entries to the driver. With this feature enabled, the device does not
add newly learned link-local ND entries whose link local addresses are not the next hop of any route into
the driver to save driver resources.
This feature affects only newly learned link-local ND entries rather than existing ND entries.
To minimize link-local ND entries:
Step Command Remarks
1. Enter system view. system-view N/A
2. Minimize link-local ND
entries. ipv6 neighbor link-local
minimize By default, the device assigns all ND entries
to the driver.
266B
Setting the hop limit
Perform this task to implement the following functions:
• Set the value of the Hop Limit field for IPv6 packets sent by the device.
• If you use the undo ipv6 nd ra hop-limit unspecified command, the device sets the hop limit value
configured by this task in a sent RA message. A host receiving the RA message fills the value into
the Hop Limit field of sent IPv6 packets.