Black Box TS250A, Руководство пользователя, Страница: 43 / 64

Standard and optional parts
Chapter 4 Aggregator TAPs
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Standard and optional parts
Carefully unpack the TAP and check for damaged or missing parts.
The TAP ships with the following items:

Aggregator TAP

Voltage auto-sensing universal power supply and A/C power
cord

Manual
Your kit may also contain:

Patch cable(s)

Analyzer cable(s)

Redundant power supply

Rack or bay mount
If any part is missing or damaged, contact Black Box Support
immediately.
Choosing an Aggregator TAP buffer size
With the understanding that an Aggregator TAP is designed for use on
network links with low-to-moderate utilization, they do have their
place. You should know what your network utilization is before you
decide to use an Aggregator TAP. If your network utilization is too
high, an Aggregator TAP may not be the correct solution for you.
The internal buffer helps absorb traffic spikes of over 50% full-duplex
bandwidth saturation (100% when both data streams are combined),
because the analyzer’s single receive interface is limited to line rate,
and the amount of data on the network under analysis can be two
times the line rate. The data in the buffer is released when utilization
drops to the point where the analyzer interface can move both the
“live” data plus the data released from the buffer. Packet loss is
unavoidable if the utilization spikes exceed the capacity of the buffer.
Packet loss occurs only to the analyzer. No traffic loss occurs between
Link A (typically a router, firewall, or server) and Link B (typically a
switch).