Configuration Guide Configuring IPv6
One or multiple IPv6 address prefixes (used for on-link determination or stateless address auto-configuration)
Validity of the IPv6 address prefix
Host auto-configuration method (stateful or stateless)
Default device information (whether the device acts as the default device; if yes, the interval for acting as the default
device is also included.)
Other information provided for host configuration, such as hop limit, MTU, and NS retransmission interval
RA packets can also be used as replies to the RS packets sent by a host. Using RS packets, a host can obtain the
auto-configured information immediately after started rather than wait for the RA packets sent by the device. If no unicast
address is configured for a newly started host, the host includes the unspecified address (0:0:0:0:0:0:0:0) as the source
address in the RS packet. Otherwise, the host uses the configured unicast address as the source address and the
multicast address of all local routing devices (FF02::2) as the destination address in the RS packet. As an reply to the RS
packet, the RA packet uses the source address of the RS packet as the destination address (if the source address is the
unspecified address, it uses the multicast address of all local nodes (FF02::1).
In an RA packet, the following parameters can be configured:
Ra-interval: Interval for sending the RA packet.
Ra-lifetime: Lifetime of a router, that is, whether the device acts as the default router on the local link and the interval
for acting as the default router.
Prefix: Prefix of an IPv6 address on the local link. It is used for on-link determination or stateless address
auto-configuration, including other parameter configurations related to the prefix.
Ns-interval: NS packet retransmission interval.
Reachabletime: Period when the device regards a neighbor reachable after detecting a Confirm Neighbor
Reachability event.
Ra-hoplimit: Hops of the RA packet, used to set the hop limit for a host to send a unicast packet.
Ra-mtu: MTU of the RA packet.
Managed-config-flag: Whether a host receiving this RA packet obtains the address through stateful
auto-configuration.
Other-config-flag: Whether a host receiving this RA packet uses DHCPv6 to obtain other information except the IPv6
address for auto-configuration.
Configure the above parameters when configuring IPv6 interface attributes.
Redirection
If a router receiving an IPv6 packet finds a better next hop, it sends the ICMP Redirect packet to inform the host of the
better next hop. The host will directly send the IPv6 packet to the better next hop next time.
Maximum Number of Unresolved ND Entries
You can configure the maximum number of unresolved ND entries to prevent malicious scanning network segments
from generating a large number of unresolved ND entries and occupying excessive memory space.
Maximum Number of ND Options
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