289
Parameters
None
Description
Use
mld require-router-alert
to configure the interface to discard MLD messages without the Router-Alert
option.
Use
undo mld require-router-alert
to restore the default.
By default, the device does not check the Router-Alert option. That is, it forwards all received MLD
messages to the upper layer protocol for processing.
Related commands:
mld send-router-alert
and
require-router-alert
.
Examples
# Configure VLAN-interface 100 to discard MLD messages without the Router-Alert option.
<Sysname> system-view
[Sysname] interface vlan-interface 100
[Sysname-Vlan-interface100] mld require-router-alert
mld robust-count
Syntax
mld robust-count
robust-value
undo mld robust-count
View
Interface view
Default level
2: System level
Parameters
robust-value
: Specifies an MLD querier’s robustness variable, in the range of 2 to 5.
Description
Use
mld robust-count
to configure the MLD querier’s robustness variable on the current interface.
Use
undo mld robust-count
to restore the default.
By default, the MLD querier’s robustness variable is 2.
The MLD querier’s robustness variable defines the maximum number of attempts for transmitting MLD
general queries, multicast-address-specific queries, or multicast-address-and-source-specific queries in
case of packet loss because of network problems. A greater value of the robustness variable makes the
MLD querier "more robust", but results in a longer IPv6 multicast group timeout time.
The MLD querier’s robustness variable determines the following values:
•
The default number of MLD general queries the MLDv1/v2 querier sends on startup.
•
The number of multicast-address-specific queries the MLDv1 querier sends after receiving an MLD
done message.
•
The number of multicast-address-and-source-specific queries the MLDv2 querier sends after
receiving an MLD report that tells relation changes between IPv6 multicast groups and IPv6
multicast sources.