Test-Um NT750 - Manual (Page 14)

LanScaper
TM
4.4 DHCP On/Off -
4.5 MAC add -
4.6 Units-Feet/Meters -
ARP received
DHCP Request -
Attempt -
Successful -
Find Active Link -
Link Found -
Link Not Found
Link word Err -
Lost Link -
This is a simple on-off selection made using the SEL button. The last
displayed state is the selected state. DHCP is a protocol negotiation used to automatically
configure the IP parameters of the LanScaper™ on a specific LAN segment. With DHCP On, the
next time the PING test is started, the tester will request IP parameters it needs for LAN
communication from a DHCP server on that LAN segment. If a response from a server is received,
the tester will configure itself with the acquired parameters and start to PING. Note that the only IP
parameter not received from the host is the Target IP address, which is always manually entered. If
no response is received, the tester cannot do any PINGing on that LAN. In that case, the PING
setup must be manually entered, and the DHCP Off state must be selected. The next PING test will
then attempt to communicate with the manually entered parameters. When used as a source for
PINGs to another LanScaper™ in the Validator mode, the PING Generator LanScaper™ must be in
DHCP Off (manual) mode.
This is a display-only of the factory-set Media Access Control number for the
specific LanScaper™ unit. All Ethernet-interfaced devices must have a universally-unique identifier
to be used as their address. This information is provided as a convenience to the user.
This is a simple selection made with the SEL button to choose whether the
tester displays the cable length it measures in feet or meters. The length constant is converted to
the new units.
- In Validate Link mode, this status shows that the tester has detected another active
LanScaper™ trying to start a PING conversation. This status flashes for a few seconds while the
units negotiate an IP address they can use to PING each other.
In the PING test with DHCP On, the LanScaper™ displays this message on the
first line while it is trying to get the required information from a DHCP server. The second line
displays:
count of DHCP requests sent out, if this number continues to increment, no response
is being received.
Shows for a short time after the server responds to the request.
The tester is searching for incoming Link pulses while waiting to start an active
test. Flash Link LED and PING test modes need to be connected to an active network in order to
run. In these modes, this status is displayed while the tester is searching both the 1-2 and 3-6 pairs
for incoming Ethernet Link pulses. In the Validate Link mode, the LanScaper™ assumes an active
NIC configuration, generating Link pulses on the 1-2 pair. This allows another LanScaper™ to be
connected directly to it.
Status displayed while searching for Link pulses after an incoming signal has been
detected.
- Status displayed while searching for Link pulses and nothing has been detected.
The Link word captured by the LanScaper™ during Jack ID test from an attached
100Mbit Ethernet device decoded an unrecognized value. May indicate a cable problem or a
hardware problem with the connected device.
A test was active, after having found incoming Link pulses, but they stopped being
received. Possibly due to the cable being disconnected or the connected device being shut off.
5.0 STATUS AND ERROR MESSAGES FOR NETWORK TEST MODES