Spirent SmartBits System, Справочное руководство

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Chapter 6: Optional Applications
SmartMulticastIP
56 SmartBits System Reference
SmartMulticastIP
SmartMulticastIP is a network technology, used in multimedia and data-sharing
applications, that delivers a stream of IP traffic from a sender to multiple receivers
simultaneously.
The following cards can be tested using the following SmartBits chassis:
•
In SMB-200/2000:
– ML-7710, 10/100 Base-TX, SmartMetrics.
– ML-7711, 100 Base-FX Fiber, SmartMetrics.
•
In SMB-600 and SMB-6000B:
– LAN-3111A, 100 Base-FX Fiber.
– LAN-3201A, 1000 Base Ethernet, SmartMetrics, Multi Mode.
– LAN-3201As, 1000 Base Ethernet, SmartMetrics, Single Mode.
– LAN-3201B, SmartMetrics, GBIC.
Refer to the SmartMulticastIP User Guide located at http://www.netcomsystems.com/
support/documentation.asp for a complete description of the tests available. Table 6-4
gives a brief description of these tests.
Table 6-4. SmartMulticastIP Tests and Descriptions
Test Description
Aggregated Multicast
Throughput Determines the maximum transmission rate at which
the DUT can forward IP multicast traffic with no frame
loss as the number of destination ports increases.
Forwarding Latency Determines the DUT’s forwarding latency of IP
multicast frames. Also provides the minimum,
maximum, and average latencies, as well as the latency
distribution per port.
Group Join/Leave Latency Determines the time it takes the DUT to set up and tear
down its multicast forwarding tables. Specifically, it
measures the time it takes for:
•
SmartCard ports to start receiving multicast frames
once an IGMP join request is sent to the DUT.
•
SmartCard ports to receive the last multicast frame
once an IGMP join request is sent to the DUT.
Mixed Class Throughput Determines the DUTs throughput when transmitting
both multicast and unicast traffic.