Netopia 4541 Manuale Utente
13-4 User’s Reference Guide
Packets Lost: The number of packets unaccounted for, shown in total and as a percentage of total packets
sent. This statistic may be updated during the Ping test, and may not be accurate until after the test is over.
However, if an escalating one-to-one correspondence is seen between Packets Out and Packets Lost, and
Packets In is noticeably lagging behind Packets Out, the destination is probably unreachable. In this case, use
STOP PING.
sent. This statistic may be updated during the Ping test, and may not be accurate until after the test is over.
However, if an escalating one-to-one correspondence is seen between Packets Out and Packets Lost, and
Packets In is noticeably lagging behind Packets Out, the destination is probably unreachable. In this case, use
STOP PING.
Round Trip Time (Min/Max/Avg): Statistics showing the minimum, maximum, and average number of
seconds elapsing between the time each Ping packet was sent and the time its corresponding return Ping
packet was received.
seconds elapsing between the time each Ping packet was sent and the time its corresponding return Ping
packet was received.
The time-to-live (TTL) value for each Ping packet sent by the Netopia 4541/4542 is 255, the maximum allowed.
The TTL value defines the number of IP routers that the packet can traverse. Ping packets that reach their TTL
value are dropped, and a “destination unreachable” notification is returned to the sender (see the table on the
previous page). This ensures that no infinite routing loops occur. The TTL value can be set and retrieved using
the SNMP MIB-II ip group’s ipDefaultTTL object.
The TTL value defines the number of IP routers that the packet can traverse. Ping packets that reach their TTL
value are dropped, and a “destination unreachable” notification is returned to the sender (see the table on the
previous page). This ensures that no infinite routing loops occur. The TTL value can be set and retrieved using
the SNMP MIB-II ip group’s ipDefaultTTL object.
Trace Route
You can count the number of routers between your Netopia Router and a given destination with the Trace Route
utility.
utility.
In the Statistics & Diagnostics screen, select Trace Route and press Return. The Trace Route screen appears.
Netopia
Netopia
host
host
Netopia
Netopia
host
Netopia
Netopia
host
host
host
send Ping packet 1
send return Ping packet 1
send Ping packet 2
send Ping packet 3
send return Ping packet 2
send return Ping packet 3
receive return Ping packet 1
receive Ping packet 1
receive Ping packet 3
receive Ping packet 2
receive return Ping packet 2
receive return Ping packet 3
time