Thursday, March 17, 2016

MA5600T Multicast Feature Glance

Definition
Multicast is group communication where data is addressed to a group of destination 
hosts simultaneously. Each multicast address represents a multicast group and all hosts 
in a multicast group can receive the same data. Multicast applies in IPTV,multimedia 
conferencing, and gaming services.

Value
Reduces bandwidth overheads
Each link carries at most one copy of the same multicast data, maximally reducing bandwidth overheads.
Decreases load
Transmitting data in multicast mode decreases video server's and CPU's load and does not significantly increase network's load even if the number of users increases.
Prolongs transmission distance
Multicast packets can be transmitted across network segments,implementing long-distance transmission for large-scale data.
Prolongs transmission distance
Multicast packets can be transmitted across network segments,implementing long-distance transmission for large-scale data.
Application
Multicast applies in the following scenarios: FTTB/FTTC, FTTH, FTTO, as well as OLT user ports connecting to multicast users.

Highlights
Powerful Multicast Capabilities, Improving IPTV Service Deployment
Primary Features Performance
  • 8 K multicast users (1 K= 1024)
  • 4 K multicast programs
  • Concurrent playing of 4000 IPv4 and 2000 IPv6 multicast programs when the SCUH control board is used
  • Multiple levels of multicast data duplication
  • IGMP fast leave
  • 50-ms channel switching
  • 3200-pps IGMP packet processing if the SCUH control board is used
  • Physical-layer G.INP retransmission for better user experience on the IPTV service
  • 900-pps IGMP packet processing on the GPFD board
Features
  • Both IPv4 and  IPv6multicast
  • MLDv1 and MLDv2
  • MLD snooping andproxy
  • IGMPv2 and IGMPv3
  • VPLS multicast
Highlights
Conversion Between M-VLANs and C-VLANs, Implementing Multiple CPs Sharing One ONT and Supporting Open Access

The multicast data transmission meets the service requirement of multiple CPs renting different ports on the same ONT in the open access scenario, improving revenue from resources.
Layer 3 Multicast for Flexible Multicast Group Address Usages
The programs issued from different multicast sources can use the same group IP address (GIP).
Compared with Layer 2 multicast, Layer 3 multicast relieves GIP limitations due to group MAC address (GMAC) conflict.

Highlights
Comprehensive Fault Locating Methods, Facilitating Rapid Multicast Service Fault Rectification
User Log Identify causes for program ordering failures by querying user logs or fault-related operation records.
IGMP Statistics Identify IGMP packet transmit and receive issues based on IGMP packet statistics.
Multicast Traffic Statistics Based on multicast traffic statistics, determine whether:
  • Multicast data has arrived at the inbound or outbound port on the MDU at the data forwarding layer.
  • The transmission rate is excessively low.
  • Packet loss has occurred.
Multicast Emulation Emulate program ordering performed by a multicast user to locate faults by querying traffic and user information in real time.
Board recommendation
Specifications H802SCUN H801SCUH H801SCUK
Number of multicast logs 32768 32768 32768
IGMP packet processing capability 400 pps 3200 pps 400 pps
Number of multicast users If GPON service
boards are used:
8192
If other service
boards are used:
2048 		If GPON service
boards are used:
16384
If other service
boards are used:
2048 		If GPON service
boards are used:
8192
If other service
boards are used:
2048
Number of multicast programs 4096 4096 4096
Number of concurrent online programs 2000 IPv4: 4000
IPv6: 2000 		2000
Number of multicast cascading ports 2048 4096 2048

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