53
The sequence number uniquely identifies a DNS server. To modify the IPv6 address or sequence
number of a DNS server, you must first use the
undo ipv6 nd ra dns server
command to
remove the DNS server from RA message advertisement.
After you execute the
ipv6 nd ra dns server
command, the device immediately sends an RA
message with the existing and newly specified DNS server options.
After you execute the
undo ipv6 nd ra dns server
command, the device immediately sends
two RA messages.
•
The first RA message carries information about all DNS servers, including the DNS servers
specified in the
undo
command with their lifetime set to 0 seconds.
•
The second RA message carries information about remaining DNS servers.
Each time the device sends an RA message from an interface, it immediately refreshes the RA
message advertisement interval for that interface.
Examples
# Specify the DNS server address as
2001:10::100
, the server lifetime as
infinite
,
and the
sequence number as
1
for RA messages on VLAN-interface 100.
<Sysname> system-view
[Sysname] interface vlan-interface 100
[Sysname-Vlan-interface100] ipv6 nd ra dns server 2001:10::100 infinite sequence 1
Related commands
ipv6 nd ra dns server suppress
ipv6 nd ra interval
ipv6 nd ra dns server suppress
Use
ipv6 nd ra dns server suppress
to enable DNS server suppression in RA messages.
Use
undo ipv6 nd ra dns server suppress
to disable DNS server suppression in RA
messages.
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.
RA messages are suppressed by default. To disable RA message suppression, use the
undo
ipv6 nd ra halt
command.
Whether enabling this feature on an interface will trigger sending RA message immediately for DNS
server information update depends on the interface configuration:
•
If the interface has been configured with DNS server information or has obtained an
AAA-authorized DNS server address, the device immediately sends two RA messages. In the
Summary of Contents for SOHO IE4300
Page 285: ...i Contents Tcl commands 1 cli 1 tclquit 1 tclsh 2...
Page 288: ...i Contents Python commands 1 exit 1 python 1 python filename 2...
Page 291: ...i Contents Automatic configuration commands 1 autodeploy udisk enable 1...
Page 323: ...25 Sysname Ten GigabitEthernet1 0 51 undo shutdown Related commands irf port...
Page 465: ...ii stp vlan enable 55 vlan mapping modulo 55...
Page 602: ...12 Related commands display mvrp statistics...
Page 609: ...i Contents VLAN mapping commands 1 display vlan mapping 1 vlan mapping 2...
Page 678: ...9 Related commands reset pppoe relay statistics...
Page 846: ...i Contents Basic IP forwarding commands 1 display fib 1 ip forwarding table save 2...
Page 1770: ...i Contents Time range commands 1 display time range 1 time range 1...
Page 2026: ...34 Related commands display mac authentication...
Page 2028: ...ii...
Page 2143: ...i Contents User profile commands 1 display user profile 1 user profile 2...
Page 2308: ...61 ipsec transform set...
Page 2531: ...i Contents SAVI commands 1 ipv6 savi down delay 1 ipv6 savi log enable 1 ipv6 savi strict 2...
Page 2534: ...3 Sysname ipv6 savi strict Related commands ipv6 verify source...
Page 2791: ...14 Sysname track 1 Related commands delay display track...
Page 2939: ...9 sntp authentication keyid sntp reliable authentication keyid...
Page 2967: ...27 Related commands apply poe profile poe enable poe max power interface view poe priority...