Netscout OneTouch AT 10G, User Manual

Page: 129 / 248

Chapter 5: User Tests
Multicast (IGMP) Test
127
Multicast (IGMP) Test
Purpose
The Multicast (IGMP) test verifies the ability to subscribe to an
IGMP multicast group and verifies the flow of multicast data to
the OneTouch AT 10G analyzer. Multicasts are used for online
streaming of data from devices such as security video cameras,
industrial sensors, and ticker tape data.
The test verifies the availability of the multicast group and port,
as well as the provisioning of multicast support along the route,
such as IGMP snooping in switches.
Configuration
IGMP Group is the IP address of the multicast group.
The Name button allows you to assign a custom name to the test.
See also: “Name” on page 84 .
Transfer Size and Time Limit - The test will end when the selected
Transfer Size has been streamed or when the time limit has been
reached.
 If the Transfer Size has not been streamed before the Time
Limit is reached, the test will fail.

If the Transfer Size is Unlimited , the test will run until the time
limit is reached.

If the Time Limit is None , the test will run until the amount of
data specified by the Transfer Size setting has been streamed.
 If you select no time limit and unlimited transfer size, the test
will not automatically end.
Port is the UDP port on which the multicast is received.
Version - If IGMP traffic other than the specified version is
received, the test will fail. Note that in IGMPv3 the multicast
source may be specified, thereby reducing the risk that an
unauthorized party could supply the multicast data.