Ipv6 Nd Ra Halt - H3C S6550X-HI Series Command Reference Manual

Syntax
ipv6 nd ra dns server suppress
undo ipv6 nd ra dns server suppress
Default
DNS server suppression in RA messages is disabled.
Views
Interface view
Predefined user roles
network-admin
Usage guidelines
This command suppresses advertising DNS server addresses in RA messages on an interface. If
you specify a new DNS server or remove a DNS server on the interface, the device immediately
sends an RA message without any DNS server options.
RA messages are suppressed by default. To disable RA message suppression, use the

ipv6 nd ra halt

Whether enabling this feature on an interface will trigger sending RA message immediately
depends on the interface configuration:
•
If the interface has DNS server information configured or has obtained an AAA-authorized
DNS server address, the device immediately sends two RA messages. In the first message,
the lifetime for DNS server addresses is 0 seconds. The second RA message does not contain
any DNS server options.
•
If the interface has no DNS server information specified or no AAA-authorized DNS server
address assigned, no RA messages are triggered.
Whether disabling this feature on an interface will trigger sending RA message immediately
depends on the interface configuration:
•
If the interface has DNS server information configured or has obtained an AAA-authorized
DNS server address, the device immediately sends an RA message containing the DNS
server information.
•
If the interface has no DNS server information specified or no AAA-authorized DNS server
address assigned, no RA messages are triggered.
Each time the device sends an RA message from an interface, it immediately refreshes the RA
message advertisement interval for that interface.
Examples
# Enable DNS server suppression in RA messages on VLAN-interface 100.
<Sysname> system-view
[Sysname] interface vlan-interface 100
[Sysname-Vlan-interface100] ipv6 nd ra dns server suppress
Related commands
ipv6 nd ra dns server
ipv6 nd ra halt
Use
ipv6 nd ra halt
Use
undo ipv6 nd ra halt
command.
to suppress an interface from advertising RA messages.
to disable this feature.
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