Supported Platforms
Related Documentation
- ACX, J, M, MX, PTX, SRX, T Series, QFabric System, QFX Series standalone switches
- Understanding IGMP
- EX, J, M, MX, PTX, SRX, T Series, QFabric System, QFX Series standalone switches
- Modifying the IGMP Host-Query Message Interval
- EX, M, MX, PTX, T Series, QFabric System, QFX Series standalone switches
- Modifying the IGMP Robustness Variable
- EX, J, M, MX, PTX, T Series, QFabric System, QFX Series standalone switches
- show igmp interface
- show igmp statistics
Modifying the IGMP Query Response Interval
The query response interval is the maximum amount of time that can elapse between when the querier router sends a host-query message and when it receives a response from a host. Configuring this interval allows you to adjust the burst peaks of IGMP messages on the subnet. Set a larger interval to make the traffic less bursty. Bursty traffic refers to an uneven pattern of data transmission: sometimes a very high data transmission rate, whereas at other times a very low data transmission rate.
The query response interval, the host-query interval, and the robustness variable are related in that they are all variables that are used to calculate the group membership timeout. The group membership timeout 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 group membership timeout is calculated as the (robustness variable x query-interval) + (query-response-interval). If no reports are received for a particular group before the group membership timeout has expired, the routing device stops forwarding remotely originated multicast packets for that group onto the attached network.
The default query response interval is 10 seconds. You can configure a subsecond interval up to one digit to the right of the decimal point. The configurable range is 0.1 through 0.9, then in 1-second intervals 1 through 999,999.
To modify the query response interval:
- Configure the interval.[edit protocols igmp]user@host# set query-response-interval 0.4
- Verify the configuration by checking the IGMP Query Response Interval field in the output of the show igmp interface command.
- Verify the operation of the query interval by checking the Membership Query field in the output of the show igmp statistics command.
Related Documentation
- ACX, J, M, MX, PTX, SRX, T Series, QFabric System, QFX Series standalone switches
- Understanding IGMP
- EX, J, M, MX, PTX, SRX, T Series, QFabric System, QFX Series standalone switches
- Modifying the IGMP Host-Query Message Interval
- EX, M, MX, PTX, T Series, QFabric System, QFX Series standalone switches
- Modifying the IGMP Robustness Variable
- EX, J, M, MX, PTX, T Series, QFabric System, QFX Series standalone switches
- show igmp interface
- show igmp statistics
Published: 2014-07-23
Supported Platforms
Related Documentation
- ACX, J, M, MX, PTX, SRX, T Series, QFabric System, QFX Series standalone switches
- Understanding IGMP
- EX, J, M, MX, PTX, SRX, T Series, QFabric System, QFX Series standalone switches
- Modifying the IGMP Host-Query Message Interval
- EX, M, MX, PTX, T Series, QFabric System, QFX Series standalone switches
- Modifying the IGMP Robustness Variable
- EX, J, M, MX, PTX, T Series, QFabric System, QFX Series standalone switches
- show igmp interface
- show igmp statistics
