{ "igmp": {} }

Attribute	Description	Default
autostart	Automatically join after session is established	true
version	IGMP protocol version (1, 2 or 3)	3
combined-leave-join	Combine leave and join records within a single IGMPv3 report	true
start-delay	Delay between session established and initial IGMP join in seconds	1
group	Multicast group base address (e.g. 239.0.0.1)	0.0.0.0 (disabled)
group-iter	Multicast group iterator	0.0.0.1
group-count	Multicast group count	1
source	Multicast source address (e.g. 1.1.1.1)	0.0.0.0 (ASM)
zapping-interval	IGMP channel zapping interval in seconds	0 (disabled)
zapping-count	Define the amount of channel changes before starting view duration	0 (disabled)
view-duration	Define the view duration in seconds	0 (disabled)
send-multicast-traffic	Generate multicast traffic	false
multicast-traffic-length	Multicast traffic IP length	76
multicast-traffic-tos	Multicast traffic TOS priority	0
network-interface	Multicast traffic source interface
max-join-delay	Maximum join delay in milliseconds	0 (disabled)

Per default join and leave requests are send using dedicated reports. The option combined-leave-join allows the combination of leave and join records within a single IGMPv3 report using multiple group records. This option is applicable to IGMP version 3 only!

If send-multicast-traffic is true, the BNG Blaster generates multicast traffic on the network interface based on the specified group and source attributes mentioned before. This traffic includes some special signatures for faster processing and more detailed analysis.

If group is set to 293.0.0.1 with group-iter of 0.0.0.2, source 1.1.1.1 and group-count 3 the result are the following three groups (S.G) 1.1.1.1,239.0.0.1, 1.1.1.1,239.0.0.3 and 1.1.1.1,239.0.0.5.

If max-join-delay is configured, the final report includes how often the measured join delay is above the configured threshold here.