Configuring The Default Router Priority And Route Information - Huawei AR150 series Configuration Manual

Huawei AR150&200 Series Enterprise Routers
Configuration Guide - IP Service
Step 6 Run:
ipv6 nd dad attempts value
Times to send DAD messages are configured.
Step 7 Run:
ipv6 nd ns retrans-timer interval
The interval for re-sending NS messages is set.
Step 8 Run:
ipv6 nd nud reachable-time value
The NUD reachable time is set.
Step 9 Run:
ipv6 mtu mtu
MTU of the interface is configured.
----End
Follow-up Procedure
If the IPv6 MTU value is changed, run the shutdown command and the undo shutdown
command orderly in the interface view to validate the configuration.
3.4.7 Configuring the Default Router Priority and Route
Information
RA packets that carry the default router priority and route information can be transmitted over
the local link. In this manner, a proper router can be selected to forward packets of a host.
Context
If a host is connected to multiple routers, the host must select a router to forward packets based
on the destination addresses of packets. The router can advertise the default router priority and
specified route information to the host so that the host can select a proper forwarding router
based on the destination addresses of packets.
After receiving the RA packets carrying the route information, the host updates its routing table.
When sending packets to another device, the host queries the routing table and selects a proper
route to send packets.
When receiving the RA packets that carry the priority of default routers, the host updates its
default router table. When sending packets to another device, if there is no route to be selected,
the host queries the default router table. Then, the host selects a router with the highest priority
on the local link to send packets. If the router is faulty, the host selects another router in
descending order of priority.
Issue 02 (2012-03-30)
NOTE
l When the ipv6 nd ra command is run to set the interval for advertising RA messages, the interval must
be less than or equal to the life duration.
l By default, the maximum interval is 600 seconds, and the minimum interval is 200 seconds.
l By default, the life duration of RA messages is 1800 seconds. If the prefix is configured, the duration
is still 1800 seconds.
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3 Basic IPv6 Configuration
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