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Utilities and Tests 10-7
The time-to-live (TTL) value for each Ping packet sent by the Netopia
Router 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 above). 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.
Tracing a route
You can count the number of routers between your Netopia Router
and a given destination with the Trace Route utility.
Select Trace Route in the Statistics, Utilities, Tests screen and
press Return to go to the Trace Route screen.
Trace Route
Host Name or IP Address:
Maximum Hops: 30
Timeout (seconds): 5
Use Reverse DNS: Yes
START TRACE ROUTE
Trace route to a network host.
To trace a route, follow these steps:
1. Select Host Name or IP Address and enter the name or
address of the destination you want to trace.
2. Select Maximum hops (1..64) to set the maximum number of
routers to count between the Netopia Router and the
destination router, up to 64. The default is 30 hops.