Black Box TS560A, User Manual

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The target IP address can be either on the LAN segment
or remote. If the target is on the LAN, the status of the
LAN Solution Network Tester will be as described for
the router above. In the off local segment case, where
the PING packets need to be sent to the router to be
forwarded, there is an additional step necessary and
status displayed. When the router is required for target
conversation, the status shown for the target is “---” while
the tester is attempting to contact the router. The
detailed status for the target is “No Rtr response.” When
the target is remote and an ARP response has been
received from the router, the target PING packets are
sent to the router. The router, in turn, is expected to
forward them on to the target. If no response is
returned from the target, possible causes are the target
cannot be reached due to network problems, the target
is not responsive, or that the device that is active at the
IP address selected for the router is not a router and is
not forwarding the packets.
The DNS conversation is only active when the PING test
is run in the DHCP On mode because the DNS IP
address is only available from the DHCP server.
NOTE
If the DNS server IP address is known, you can enter it as a
target and PING it like any other target.
CHAPTER 4: Functional Description