User's Manual

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the host obtains the IPv6 address prefix and related parameter from this option.
Command Purpose
ipv6 nd prefix
{ipv6-prefix/prefix-length |
default
} [
no-advertise
| [valid-lifetime
preferred-lifetime [
off-link
|
no-autoconfig
]] ]
Means that the local port transmits
the prefix option's content in the
RA message.
 Setting the RA transmission interval
The following command is used to set the range of RA transmission interval. The RA transmission
interval is in general an indefinite value but a random value in a fixed range, which can avoid abrupt
flow surge in the network.
Command Purpose
ipv6 nd ra-interval-range
max min
Sets the range of RA transmission interval.
The maximum RA transmission interval is
600s and the minimum RA transmission
interval is 200s.
The interval for the local port to transmit the first three messages cannot be more than 16 seconds,
while that to transmit the following messages varies between the maximum interval (600 seconds)
and the minimum interval (200 seconds).
 Setting a specific RA transmission interval
RA packets are transmitted in an interval configured by ra-interval-range, but if users want to use
a specific transmission interval, they can set this value through the following command:
Command Purpose
ipv6 nd ra-interval
interval Sets a specific RA transmission interval,
which is not set by default.
 Setting the router-lifetime field in the RA message transmitted by the local port
The router-lifetime field in the RA message is the triple of the maximum value of ipv6 nd ra-
interval-range.
Command Purpose
ipv6 nd ra-lifetime
seconds
Sets the router-lifetime field in the RA
message transmitted by the local port.
 Setting the reachable-time field of the RA message
reachable-time means the time to reach a neighbor, which is 0 by default.
Command Purpose
ipv6 nd reachable-time
milliseconds
Sets the
reachable-time
field in the RA
message transmitted by the local port. Its
default value is 0ms.
 Setting the value of the router preference in the RA message
router-preference means the router’s priority, which accounts for two bits in the flags domain in
the RA message.The router’s priority can be high, medium and low. The medium priority is the
default settings.