Testing IGMP Snooping
Test your device's IGMP snooping implementation
with Agilent's multi-port Packets and Protocols Application.
Multicasting is the process of sending data to a certain
group of hosts on a network. The Internet Group Membership
Protocol (IGMP) is a protocol used by hosts to report
their multicast group
memberships to multicast routers. This protocol is used
in a variety of applications such as web TV and desktop
conferencing.
Generally, a Layer-2 switch will flood traffic out
of all ports for which the destination address is unknown.
This means that multicast traffic will be flooded throughout
the switch's broadcast domain, and can therefore cause
a lot of bandwidth to be unnecessarily consumed if only
a few hosts are interested in receiving the data.
IGMP snooping is a process whereby a Layer-2 switch
passively listens (or "snoops") the Layer-3
IGMP traffic to determine which ports are interested
in receiving certain multicast traffic. The switch listens
for IGMP Query, Report and Leave protocol messages.
If desired, IGMP snooping can be configured on a per-VLAN
basis.Traffic will be dynamically forwarded only to
those ports that want to receive the multicast transmission.
This can significantly reduce the amount of multicast
traffic passing through a Layer-2 network, thus better
utilizing the available bandwidth.
This application note explains how to use N2X to test
IGMP snooping implementation in your Enterprise networks
and devices.
|
Network Services 
