R2511-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V5)
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Parameters Descri
p
tion
O flag
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 the advertising device can live.
Retrans Timer
If the device fails to receive a response message within the specified time after
sending an NS message, it retransmits the NS message.
Reachable Time
If the neighbor reachability detection shows that a neighbor is reachable, the
device considers the neighbor reachable within the specified reachable time. If the
device must send a packet to the neighbor after the specified reachable time
expires, the device reconfirms whether the neighbor is reachable.
The maximum interval for sending RA messages should be less than (or equal to) the router lifetime in RA
messages, so the router can be updated through an RA message before expiration.
The values of the NS retransmission timer and the reachable time configured for an interface are sent to
hosts through RA messages. Furthermore, this interface sends NS messages at the interval of the NS
retransmission timer and considers a neighbor reachable within the reachable time.
Enabling sending of RA messages
Ste
p
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 device 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.
Configuring parameters related to RA messages
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Configure the hop limit.
ipv6 nd hop-limit value
Optional.
64 by default.