Viavi 10/100 Copper nTAP, Руководство пользователя

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8
Chapter 8: Troubleshooting
What happens if my TAP loses power?
The 10/100 Copper TAP, Optical-to-Copper Conversion, and Optical-to-Copper
Aggregator TAPs do not require any power on the Link ports. When a loss of
power occurs, the Analyzer ports stop working, but the Link ports stay connected
without any need for the endpoint devices to renegotiate their connection.
What latency does a TAP create?
Latency is created by the copper ports of a TAP. The latency is typically 200-250
nanoseconds. This is the time it takes to receive a packet, process and copy it, and
begin forwarding the copy.
Are the analyzer ports “send only”?
Yes, the analyzer ports are send only. The TAP is incapable of sending data from
the Analyzer side of the TAP to the Link (or network) side of the TAP.
The “A,” “B,” or “AB” ports on the Analyzer side of the TAP must be capable
of both transmitting and receiving data to negotiate a connection with the
analyzer and they do this through the physical interface. The physical interface
is responsible for negotiating a bi-directional connection with the analyzer and
unidirectionally sending data from the TAP to the analyzer.
There is no physical connection between the receive port on the Analyzer side of
the TAP and the TAP’s internal processor. Therefore, the TAP cannot transmit data
from the analyzer back to the Link side of the TAP.