User's Manual

Table Of Contents
533
Users Manual of CS-6306R
Setting the prefix of the RA message
The router releases address prefixes to the network host via RA message. The address prefix plus the host
address is the entire unicast address. The prefix option is carried by the RA message, and 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.