{ "igmp": {} }

Attribute

Description

Default

autostart

Automatically join after the 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 number of channel changes before starting the view duration

0 (disabled)

view-duration

Define the view duration in seconds

0 (disabled)

send-multicast-traffic

Generate multicast traffic

false

multicast-traffic-autostart

Automatically start multicast traffic

true

multicast-traffic-length

Multicast traffic IP length

76

multicast-traffic-tos

Multicast traffic TOS priority

0

multicast-traffic-pps

Multicast traffic PPS per group

1000

network-interface

Multicast traffic source interface

max-join-delay

Maximum join delay in milliseconds

0 (disabled)

Per default, join and leave requests are sent 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 applies to the 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. This traffic starts automatically, which can be suppressed by setting multicast-traffic-autostart to false. The length, TOS and packets per second (PPS) can be controlled with the corresponding options.

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 this threshold.