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eracerFlag for United States of America

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Weird internet download speeds issues.

Bright House 200/15 connection.  Line test shows rated speed.

My network:
Gigabit dumb switch and Gigabit SonicWall firewall
All internal wiring is Cat5
DHCP and DNS handled by domain controller.

Using Speedtest.net (and other metrics software)

Local domain workstations (Gigabit NIC) get 60/16

BH tech's laptop connected directly to modem with Cat6 patch cable gets 210/16 with both static and DHCP addresses.

My laptop (Gigabit NIC) connected directly to modem with Cat5 patch cable gets 65/16 with both static and DHCP addresses.
My laptop (Gigabit NIC) connected directly to modem with Cat6 patch cable gets 135/16 with both static and DHCP addresses.

Why would my laptop and its gigabit NIC be so much slower than the techs, when we are using the same Cat6 cable?  Granted, my laptop is pretty old, and has a 1st Gen i7 CPU.  I'm sure his is a 5th Gen i7.  But I didn't know CPU speed would affect a bandwidth test that much.

Also, is Cat5 cable really not able to transfer at 200mp/s?  Do I need to re-cable my entire office with Cat6?
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Dan Craciun
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A CAT5E cable should be good for gigabit speeds. But that's only if all 8 wires are connected.
1000BASE-T standard uses all 4 pairs.

HTH,
Dan
CAT 5  doesn't capable of Gigabit speed,  but CAT 5e and upper can

You should use the free tool iperf or jperf to measure bandwidth
@Nader: CAT5 definitely supports gigabit speeds, albeit on shorter distances: https://en.wikipedia.org/wiki/Category_5_cable

It just uses 4 pairs instead of 2.
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Scot Halvorsen
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Dan craciun,  yes I  agree with you,  but cat 5 has a poor performance in Gigabit Ethernet
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ASKER

In my original question I did list my results when connected directly to the modem.

It is very puzzling that I was getting different results when connected using a static IP vs. a dynamic IP.

My laptop is running Win7Pro.  Intel® Core™ I7 processor I7-640LM.  I don't have the laptop with me right now, so I can't say what the NIC is.  I know it's an Intel gigabit card.  I'll have to google all the settings to see what the advanced settings do.

My laptop is not running any other tasks when I connect it to the modem.

The switch is a Cisco SG200-50 Gigabit Smart Switch.  Not really a 'cheap' switch.

The SonicWall TZ215 firewall has pretty fast processors - I don't think it's the bottleneck here.

I'll check my NIC settings, and try again with a more modern laptop.

I think it's obvious that I need to replace my network cables.  They were installed many years ago and I suspect the connectors weren't done very well.
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ASKER

Thanks for the help.  I need to do more testing.  This shouldn't be too hard to figure out, really.  But some things are very puzzling.