H3C Technologies H3C S12500 Series Switches - Manual (Page 160)

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Parameters Description
M flag
This field determines whether hosts use the stateful autoconfiguration to acquire IPv6
addresses.
If the M flag is set to 1, hosts use the stateful autoconfiguration (for example, through
a DHCP server) to acquire IPv6 addresses. Otherwise, hosts use the stateless
autoconfiguration to acquire IPv6 addresses. Hosts generate IPv6 addresses
according to their own link-layer addresses and the prefix information advertised by
the router.
O flag
This field determines whether hosts use stateful autoconfiguration to acquire other
configuration information.
If the O flag is set to 1, hosts use stateful autoconfiguration (for example, through a
DHCP server) to acquire other configuration information. Otherwise, hosts use
stateless autoconfiguration to acquire other configuration information.
Router Lifetime
This field tells the receiving hosts how long this router can serve as a default router.
According to the router lifetime in the received RA messages, hosts determine
whether the router sending RA messages can serve as the default router.
Retrans Timer
If the switch fails to receive a response message within the specified time after
sending an NS message, the switch will retransmit the NS message.
Reachable Time
If the neighbor reachability detection shows that a neighbor is reachable, the switch
considers the neighbor reachable within the specified reachable time. If the switch
needs to send a packet to a neighbor after the specified reachable time expires, the
switch will reconfirm whether the neighbor is reachable.
To allow sending of RA messages:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Disable RA message
suppression.
undo ipv6 nd ra halt By default, RA messages are suppressed.
4. Configure the maximum
and minimum intervals for
sending RA messages.
ipv6 nd ra interval
max-interval-value
min-interval-value
Optional.
By default, the maximum interval for sending
RA messages is 600 seconds, and the
minimum interval is 200 seconds.
The switch sends RA messages at random
intervals between the maximum interval and
the minimum interval.
The minimum interval should be less than or
equal to 0.75 times the maximum interval.
To configure parameters related to RA messages:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure the hop limit. ipv6 nd hop-limit value
Optional.
64 by default.