R0106-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V7)
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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:
Ste
p
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:
Ste
p
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.
Configuring parameters for RA messages
You can enable an interface to send RA messages, and configure the interval for sending RA messages
and parameters in RA messages. After receiving an RA message, a host can use these parameters to
perform corresponding operations. Table 13 des
c
ribes the configurable parameters in an RA message.
Table 10 Parameters in an RA message and their descriptions
Parameter Descri
p
tion
Hop Limit
Maximum number of hops in RA messages. A host receiving the RA message fills the
value in the Hop Limit field of sent IPv6 packets.
Prefix information
After receiving the prefix information, the hosts on the same link can perform
stateless autoconfiguration.
MTU Guarantees that all nodes on the link use the same MTU.