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Gemini G3 - User Manual
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PING Example
C:\>ping -w 5000 172.23.10.2
Pinging 172.23.10.2 with 32 bytes of data:
Reply from 172.23.10.2: bytes=32 time=641ms TTL=59
Reply from 172.23.10.2: bytes=32 time=703ms TTL=59
Reply from 172.23.10.2: bytes=32 time=593ms TTL=59
Reply from 172.23.10.2: bytes=32 time=641ms TTL=59
Ping statistics for 172.23.10.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 593ms, Maximum = 703ms, Average = 644ms
TRACEROUTE (TRACERT) as a Performance Measuring Tool
Traceroute,
named tracert in Windows™ environments,
is a utility that describes the path in real-time
from the client machine to the remote host being contacted. It reports the IP addresses of all the routers in
between. It also reports the latency delays encountered at each hop. As with ping, E-DBA’s cycle mecha-
nism may produce an unexpectedly large delay when traversing an E-DBA airlink.
A large timeout value is also recommended when using Traceroute.
TRACEROUTE Example
C:\>tracert -w 5000 172.23.10.2
Tracing route to 172.23.10.2 over a maximum of 30 hops
1 <10 ms <10 ms <10 ms 192.168.36.37
(host
→
base)
2 641 ms 734 ms 750 ms 172.23.10.2
(host
→
base
→
mobile)
Trace complete.
FTP as a Performance Measuring Tool
FTP is a protocol used to transfer files over a TCP/IP network. Applications that implement that protocol
are good candidates for measuring the throughput of a link. Note that the FTP & TCP/IP software com-
ponents in the server and client computers may have an adverse effect on performance – factors such as
FTP buffer size, TCP window size and the TCP congestion-control algorithm may interact to produce
throughput lower than that of the theoretical maximum. As well, be careful about inferring total system
performance from the result of a single FTP transfer.
Conclusion
Although some standard tools such as the ones outlined above can be used to get a rough idea of an
E-DBA system's performance, the best metric will always be to test the system in conditions that repro-
duce as closely as possible its real-life usage. For example, by using applications similar to wireless CAD
systems and the appropriate traffic profile.