Re: Ethernet connect - host to test?
- From: Markus Rehbach <Markus.Rehbach@xxxxxx>
- Date: Thu, 30 Aug 2007 07:58:18 +0200
betty wrote:
If there is a better newsgroup for my question please let me know
but..
Is there a tool or cheap method to test physical ethernet connects?
I was hoping there was a reasonably priced tool that can check signal
strength/quality of the wires, similar to how the cable company checks
coax cable.
I am experiencing poor network connectivity from some offices around
the building here. Unless someone else has a recommendation how I can
go about to check into this problem. The switch has a green light for
a 10/100 connection. Any suggestions?
You could install an NDT server in your 'server area' or (worse) use an
NDT server in the Internet.
http://e2epi.internet2.edu/ndt/ndt-server-list.html
From the Documentation:
....
It can also identify 2 serious error conditions:
# Duplex Mismatch
# Excessive packet loss due to faulty cables.
....
Not a Fluke but perhaps a good start for troubleshooting.
Example Output from my PC to a server in the Internet:
------ Web100 Detailed Analysis ------
Cable modem/DSL/T1 link found.
Link set to Full Duplex mode
Information: throughput is limited by other network traffic.
Good network cable(s) found
Normal duplex operation found.
Web100 reports the Round trip time = 477.25 msec; the Packet size = 1440
Bytes; and
No packet loss was observed.
This connection is receiver limited 18.71% of the time.
Increasing the current receive buffer (138.0 KB) will improve performance
This connection is network limited 81.24% of the time.
Contact your local network administrator to report a network problem
Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: ON
RFC 1323 Window Scaling: ON
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's
IP address
.
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- From: betty
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