R0106-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V7)

209
Configuring parameters for 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. Configure the prefix
information in RA messages.
ipv6 nd ra prefix { ipv6-prefix
prefix-length |
ipv6-prefix/prefix-length }
valid-lifetime preferred-lifetime
[ no-autoconfig | off-link ] *
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. If the IPv6 address is
manually configured, the prefix uses a
fixed valid lifetime of 2592000 seconds
(30 days) and a preferred lifetime of
604800 seconds (7 days). If the IPv6
address is automatically obtained, the
prefix uses the valid lifetime and
preferred lifetime configured for the IPv6
address.
4. Turn off the MTU option in
RA messages.
ipv6 nd ra no-advlinkmtu
By default, RA messages contain the
MTU option.
5. Specify unlimited hops in RA
messages.
ipv6 nd ra hop-limit unspecified
By default, the maximum number of hops
in RA messages is 64.
6. Set the M flag bit to 1.
ipv6 nd autoconfig
managed-address-flag
By default, the M flag bit is set to 0 and
hosts acquire IPv6 addresses through
stateless autoconfiguration.
7. Set the O flag bit to 1.
ipv6 nd autoconfig other-flag
By default, the O flag bit is set to 0 and
hosts acquire other configuration
information through stateless
autoconfiguration.
8. Configure the router lifetime
in RA messages.
ipv6 nd ra router-lifetime value
By default, the router lifetime is 1800
seconds.
9. Set the NS retransmission
timer.
ipv6 nd ns retrans-timer value
By default, an interface sends NS
messages every 1000 milliseconds, and
the value of the Retrans Timer field in RA
messages is 0.
10. Set the router preference in
RA messages.
ipv6 nd router-preference { high
| low | medium }
By default, the router preference is
medium.
11. Set the reachable time.
ipv6 nd nud reachable-time
value
By default, the neighbor reachable time
is 30000 milliseconds, and the value of
the Reachable Time field in sent RA
messages is 0.
Configuring the maximum number of attempts to send an NS
message for DAD
An interface sends an NS message for DAD after obtaining an IPv6 address. If the interface does not
receive a response within the time specified by the ipv6 nd ns retrans-timer command, it sends an NS