Multicast For Multimedia; Static Routes; Join And Leave Performance - Avaya 8800 Planning And Engineering

Multicast network design

Multicast for multimedia

The Avaya Ethernet Routing Switch 8800/8600 provides a flexible and scalable multicast
implementation for multimedia applications. Several features are dedicated to multimedia
applications and in particular, to television distribution.
Multicast for multimedia navigation
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Static routes

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Join and leave performance

• Fast Leave
• Last Member Query Interval tuning
Static routes
You can configure DVMRP static mroutes. This feature is useful in cases where streams must
flow continuously and not become aged. Be careful in using this feature—ensure that the
programmed entries do not remain on a switch when they are no longer necessary.
You can also use IGMP static receivers for PIM static (S,G)s. The main difference between
static mroutes and static (S,G) pairs is that static mroute entries only require the group address.
You can use static receivers in edge configurations or on interconnected links between
switches.
Join and leave performance
For TV applications, you can attach several TV sets directly, or through Business Policy Switch
2000, to the Avaya Ethernet Routing Switch 8800/8600. Base this implementation on IGMP;
the set-top boxes use IGMP reports to join a TV channel and IGMP Leaves to exit the channel.
When a viewer changes channels, an IGMPv2 Leave for the old channel (multicast group) is
issued, and a membership report for the new channel is sent. If viewers change channels
continuously, the number of joins and leaves can become large, particularly when many
viewers are attached to the switch.
The Avaya Ethernet Routing Switch 8800/8600 supports more than a thousand Joins/
Leaves per second, which is well adapted to TV applications.
210 Planning and Engineering — Network Design
on page 210
on page 210
on page 211
on page 211
November 2010