189
Parameter Description
M flag
Determines whether a host uses stateful autoconfiguration to obtain an IPv6
address.
If the M flag is set to 1, the host uses stateful autoconfiguration (for example, from a
DHCPv6 server) to obtain an IPv6 address. Otherwise, the host uses stateless
autoconfiguration to generate an IPv6 address according to its link-layer address
and the prefix information in the RA message.
O flag
Determines whether a host uses stateful autoconfiguration to obtain configuration
information other than IPv6 address.
If the O flag is set to 1, the host uses stateful autoconfiguration (for example, from a
DHCPv6 server) to obtain configuration information other than IPv6 address.
Otherwise, the host uses stateless autoconfiguration.
Router Lifetime
Tells the receiving hosts how long the advertising router can live. If the lifetime of a
router is 0, the router cannot be used as the default gateway.
Retrans Timer
If the device does not 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 needs to send a packet to the neighbor after the specified reachable time
expires, the device reconfirms whether the neighbor is reachable.
Router Preference
Specifies the router preference in a RA message. A host selects a router as the
default gateway according to the router preference. If router preferences are the
same, the host selects the router from which the first RA message is received.
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 by an RA message before expiration.
The values of the NS retransmission timer and the reachable time configured for an interface are sent in
RA messages to hosts. 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
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Enable sending of RA
messages.
undo ipv6 nd ra halt
The default setting is disabled.
4.
Configure the maximum and
minimum intervals for sending
RA messages.
ipv6 nd ra interval
max-interval-value
min-interval-value
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.
Summary of Contents for MSR 2600 Series
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