Related Documentation
- EX Series
- Modifying the MLD Query Response Interval
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- J Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- M Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- MX Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- PTX Series
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- SRX Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- T Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- Additional Information
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
Modifying the MLD Host-Query Message Interval
The objective of MLD is to keep routers up to date with IPv6 group membership of the entire subnet. Routers need not know who all the members are, only that members exist. Each host keeps track of which multicast groups are subscribed to. On each link, one router is elected the querier. The MLD querier router periodically sends general host-query messages on each attached network to solicit membership information. These messages solicit group membership information and are sent to the link-scope all-nodes address FF02::1. A general host-query message has a maximum response time that you can set by configuring the query response interval.
The query response timeout, the query interval, and the robustness variable are related in that they are all variables that are used to calculate the multicast listener interval. The multicast listener interval is the number of seconds that must pass before a multicast router determines that no more members of a host group exist on a subnet. The multicast listener interval is calculated as the (robustness variable x query-interval) + (1 x query-response-interval). If no reports are received for a particular group before the multicast listener interval has expired, the routing device stops forwarding remotely-originated multicast packets for that group onto the attached network.
By default, host-query messages are sent every 125 seconds. You can change this interval to change the number of MLD messages sent on the subnet.
To modify the query interval:
- Configure the interval.[edit protocols mld]user@host# set query-interval 200
The value can be from 1 through 1024 seconds.
- Verify the configuration by checking the MLD Query Interval field in the output of the show mld interface command.
- Verify the operation of the query interval by checking the Listener Query field in the output of the show mld statistics command.
Related Documentation
- EX Series
- Modifying the MLD Query Response Interval
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- J Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- M Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- MX Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- PTX Series
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- SRX Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- T Series
- Understanding MLD
- Modifying the MLD Query Response Interval
- Example: Modifying the MLD Robustness Variable
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
- Additional Information
- show mld interface in the Junos OS Operational Mode Commands
- show mld statistics in the Junos OS Operational Mode Commands
