H3C Technologies H3C S7500E Series Switches - Manual (Page 135)

13-16
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, that is, hosts generate IPv6
addresses according to their own link-layer addresses and the prefix information
issued by the router.
O flag
This field determines whether hosts use the stateful autoconfiguration to acquire
information other than IPv6 addresses.
If the O flag is set to 1, hosts use the stateful autoconfiguration (for example,
through a DHCP server) to acquire information other than IPv6 addresses.
Otherwise, hosts use the stateless autoconfiguration to acquire information other
than IPv6 addresses.
Router lifetime
This field is used to set the lifetime of the router that sends RA messages to serve
as the default router of hosts. 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 device fails to receive a response message within the specified time after
sending an NS message, the device will retransmit 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 a neighbor after the specified reachable time
expires, the device will reconfirm whether the neighbor is reachable.
The values of the Retrans Timer and the Reachable Time configured for an interface are sent to hosts
via RA messages. Furthermore, this interface sends NS messages at the interval of Retrans Timer and
considers a neighbor reachable within the Reachable Time.
Follow these steps to configure parameters related to an RA message:
To do… Use the command… Remarks
Enter system view system-view —
Configure the hop limit ipv6 nd hop-limit value
Optional
64 by default.