3com S7906E Manuel De Montage
1-15
Parameters
Description
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.
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 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.
Enable the consistency
check on the source MAC
address of ND packets
check on the source MAC
address of ND packets
ipv6 nd mac-check enable
Optional
Disabled by default.
Enter interface view
interface interface-type
interface-number
interface-number
—
Disable the RA message
suppression
suppression
undo ipv6 nd ra halt
Required
By default, RA messages are
suppressed.
suppressed.
Configure the maximum and
minimum intervals for
sending RA messages
minimum intervals for
sending RA messages
ipv6 nd ra interval
max-interval-value
min-interval-value
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.
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.
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.
than or equal to 0.75 times the
maximum interval.
Configure the prefix
information in RA messages
information in RA messages
ipv6 nd ra prefix
{ ipv6-address prefix-length |
ipv6-address/prefix-length }
valid-lifetime
preferred-lifetime
[ no-autoconfig | off-link ] *
{ ipv6-address prefix-length |
ipv6-address/prefix-length }
valid-lifetime
preferred-lifetime
[ no-autoconfig | off-link ] *
Optional
By default, no prefix information is
configured for RA messages, and
the IPv6 address of the interface
sending RA messages is used as
the prefix information.
configured for RA messages, and
the IPv6 address of the interface
sending RA messages is used as
the prefix information.