4.4. MLD Configuration Command Reference

This command enables the context to configure Multicast Listener Discovery (MLD) parameters.

The no form of the command disables MLD.

This command creates and enables the context to configure MLD group interface parameters.

This command configures the query source IPv6 address for all group interfaces.

The no form of the command removes the IP address.

This command configures the query source IPv6 address for the group interface. This IP address overrides the source IP address configured at the router level.

The no form of the command removes the IPv6 address.

This command disables the processing of MLD messages outside of the subscriber-host context. No other hosts outside of the subscriber-hosts can create MLD states.

Disabling this command allows the creation of the MLD states that correspond to the AN that operate in MLD proxy mode. In this mode, the AN will hide source IP addresses of MLD messages and will source MLD messages with its own IP address. In this case, an MLD state can be created under the sap context. This MLD state creation under the SAP is controlled via the import policy under the group-interface.

The MLD state processing for regular subscriber-hosts is unaffected by this command.

The no form of the command disables the command.

This command enables subnet checking for MLD messages received on this interface. All MLD packets with a source address that is not in the local subnet are dropped.

This command specifies the MLD version. If routers run different versions of MLD, they will negotiate the lowest common version of MLD that is supported by hosts on their subnet and operate in that version. For MLD to function correctly, all routers on a LAN should be configured to run the same version of MLD on that LAN.

The shutdown command administratively disables the entity. When disabled, an entity does not change, reset, or remove any configuration settings or statistics. Many entities must be explicitly enabled using the no shutdown command and must be shut down before they may be deleted.

Unlike other commands and parameters where the default state is not indicated in the configuration file, shutdown and no shutdown are always indicated in system generated configuration files.

The no form of the command puts an entity into the administratively enabled state.

This command enables the context to configure an Multicast Listener Discovery (MLD) interface. The interface is a local identifier of the network interface on which reception of the specified multicast address is to be enabled or disabled.

The no form of the command deletes the MLD interface. The shutdown command in the config>router>mld>interface context can be used to disable an interface without removing the configuration for the interface.

This command enables router alert checking for MLD messages received on this interface.

The no form of the command disables the router alert checking.

This command specifies the import route policy to be used for determining which membership reports are accepted by the router. Route policies are configured in the config>router>policy-options context.

When an import policy is not specified, all the MLD reports are accepted.

The no form of the command removes the policy association from the MLD instance.

This command specifies the maximum number of groups for which MLD can have local receiver information based on received MLD reports on this interface. When this configuration is changed dynamically to a value lower than the currently accepted number of groups, the groups that are already accepted are not deleted. Only new groups will not be allowed.

This command configures the maximum number of group sources for which MLD can have local receiver information based on received IGMP reports on this interface. When this configuration is changed dynamically to a value lower than currently accepted number of group sources, the group sources that are already accepted are not deleted. Only new group sources will not be allowed.

The no form of the command reverts to the default.

This command configures the maximum number of group sources for this group-interface.

This command specifies the frequency that the querier router transmits general host-query messages. The host-query messages solicit group membership information and are sent to the all-systems multicast group address, 224.0.0.1.

This command configures the frequency at which the querier sends group-specific query messages including messages sent in response to leave-group messages. The lower the interval, the faster the detection of the loss of the last member of a group.

This command specifies how long the querier router waits to receive a response to a host-query message from a host.

This command tests multicast forwarding on an interface without a receiver host. When enabled, data is forwarded to an interface without receiving membership reports from host members.

This command enables the context to add a static multicast group either as a (*,G) or one or more (S,G) records. Use MLD static group memberships to test multicast forwarding without a receiver host. When MLD static groups are enabled, data is forwarded to an interface without receiving membership reports from host members.

When static MLD group entries on point-to-point links that connect routers to a rendezvous point (RP) are configured, the static MLD group entries do not generate join messages toward the RP.

The no form of the command removes the IPv6 address from the configuration.

This command specifies an IPv6 unicast address that sends data on an interface. This enables a multicast receiver host to signal a router the group to receive multicast traffic from, and from the source(s) that the traffic is expected.

The source command is mutually exclusive with the specification of individual sources for the same group.

The source command, in combination with the group, is used to create a specific (S,G) static group entry.

The no form of the command removes the source from the configuration.

This command adds a static (*,G) entry. This command can only be enabled if no existing source addresses for this group are specified.

Use the no form of the command to remove the starg entry from the configuration.

This command configures the robust count. The robust-count variable allows tuning for the expected packet loss on a subnet. If a subnet anticipates losses, the robust-count variable can be increased.

This command enables the context to configure group ranges which are translated to SSM (S,G) entries. If the static entry needs to be created, it has to be translated from a IGMPv1 IGMPv2 request to a Source Specific Multicast (SSM) join. An SSM translate source can only be added if the starg command is not enabled. An error message is generated if you try to configure the source command with starg command enabled.

This command is used to configure group ranges which are translated to SSM (S,G) entries.

This command specifies the source IP address for the group range. Whenever a (*,G) report is received in the range specified by grp-range start and end parameters, it is translated to an (S,G) report with the value of this object as the source address.