HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Services Configuration G - Page 136

Setting the aging timer for ND entries in stale state, Minimizing link-local ND entries

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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 1. Enter system view. 2. Set the aging timer for ND entries in stale state. Command Remarks system-view N/A ipv6 neighbor stale-aging aging-time The default setting is 240 minutes. 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 1. Enter system view. 2. Minimize link-local ND entries. Command system-view ipv6 neighbor link-local minimize Remarks N/A By default, the device assigns all ND entries to the driver. 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. To set the hop limit: Step 1. Enter system view. 2. Set the Hop Limit field in the IP header. Command system-view ipv6 hop-limit value Remarks N/A The default setting is 64. 128

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128
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 240
minutes.
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.
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.
To set the hop limit:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Set the Hop Limit field in
the IP header.
ipv6 hop-limit
value
The default setting is 64.