Design Reference
Table Of Contents
- Contents
- Chapter 1: Introduction
- Chapter 2: New in this release
- Chapter 3: Network design fundamentals
- Chapter 4: Hardware fundamentals and guidelines
- Chapter 5: Optical routing design
- Chapter 6: Platform redundancy
- Chapter 7: Link redundancy
- Chapter 8: Layer 2 loop prevention
- Chapter 9: Spanning tree
- Chapter 10: Layer 3 network design
- Chapter 11: SPBM design guidelines
- Chapter 12: IP multicast network design
- Multicast and VRF-lite
- Multicast and MultiLink Trunking considerations
- Multicast scalability design rules
- IP multicast address range restrictions
- Multicast MAC address mapping considerations
- Dynamic multicast configuration changes
- IGMPv3 backward compatibility
- IGMP Layer 2 Querier
- TTL in IP multicast packets
- Multicast MAC filtering
- Guidelines for multicast access policies
- Multicast for multimedia
- Chapter 13: System and network stability and security
- Chapter 14: QoS design guidelines
- Chapter 15: Layer 1, 2, and 3 design examples
- Chapter 16: Software scaling capabilities
- Chapter 17: Supported standards, RFCs, and MIBs
- Glossary
Multicast access policies can apply to a routed PIM interface if Internet Group Management
Protocol (IGMP) reports the reception of multicast traffic.
The following rules and limitations apply to IGMP access policy parameters when you use them
with IGMP instead of PIM:
• The static member parameter applies to IGMP snooping and PIM on both interconnected
links and edge ports.
• The Static Not Allowed to Join parameter applies to IGMP snooping and PIM on both
interconnected links and edge ports.
• For multicast access control, the denyRx parameter applies to IGMP snooping and PIM.
The DenyTx and DenyBoth parameters apply only to IGMP snooping.
Multicast for multimedia
Virtual Services Platform 4000 provides a flexible and scalable multicast implementation for
multimedia applications. Several features are dedicated to multimedia applications and in
particular, to television distribution.
Join and leave performance
For TV applications, you can attach several TVs directly, or through an IGMP-capable ethernet
switch, to the Virtual Services Platform 4000. Base this implementation on IGMP; the set-top
boxes use IGMP reports to join a TV channel and IGMP leaves to exit the channel. After 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 if many viewers attach to the
switch.
Virtual Services Platform 4000 supports more than a thousand joins and leaves per second,
which is well adapted to TV applications.
Important:
For IGMPv3, Avaya recommends that you ensure a join rate of 1000 per second or less.
This ensures the timely processing of join requests.
If you use the IGMP proxy functionality at the receiver edge, you reduce the number of IGMP
reports received by Virtual Services Platform 4000. This provides better overall performance
and scalability.
Fast Leave
IGMP Fast Leave supports two modes of operation: single user mode and multiple user
mode.
In single user mode, if more than one member of a group is on the port and one of the group
members leaves the group, everyone stops receiving traffic for this group. A group-specific-
query is not sent before the effective leave takes place.
Multicast for multimedia
Network Design Reference for Avaya VSP 4000 February 2014 115