[PLUG] SOLVED!: Throughput Reduction thru Router

[Casey Bralla via plug <plug@lists.phillylinux.org>]

Who'd a thunk it?!   The network cable was bad.  I replaced the cable and immediately got 325 Mbps, as it should be. (I had been using a different, shorter cable when I used my comcast router.)

Here's what I learned in more investigation:

• The cable lookes good visually.  Injection Molded plugs.  No kinks or bends.  It had printing on the wire that said: "ETL VERIFIED EIA/TIA-568A CAT 5 UTP EVERNEW" (I'm assuming this is for the base wire, not the assembly)
• Cable tester showed that 2 pairs were dead.  It was only transmitting with half the number of pairs.
• I can see what looks like infiltration of the clear RJ-45 plug by plastic during the injection molding process.  Maybe the plastic is insulating some of the pins.

I've had this cable for ages, and never noticed anything before.  I suppose it was fine in the old 100 Mbps days, but woefully inadequate for gigabit ethernet.

Thanks to all for the suggestions!

On 8/24/24 4:18 PM, Carl Johnson via plug wrote:

The only two items that come to mind immediately for me based on past experience....

1. MTU... in the past Comcast was assigning my router an MTU of 576 as opposed to 1500. This caused MUCH more severe throughput/latency issues for me than what you're seeing though.

Not sure how much visibility you have into seeing what the MTU is that you're getting on the WAN side on that thing.

2. Flakey CAT 5/6 cable(s)

I hope that helps....

On Sat, Aug 24, 2024, 3:52 PM Casey Bralla via plug <plug@lists.phillylinux.org> wrote:

I recently ditched my Comcast xfinity wireless router and purchased my
own cable modem.  (I didn't like all the info that the comcast router
might be gathering, plus it broadcast hidden SSID's on a channel I
wanted to use.)

Hooked directly to my new cable modem, I can get 350 MBPS, which
slightly exceeds my contracted 300 MBPS connection rate.  However, when
I plug in my brand new router (to translate the cable modems address of
74.xxx.xxx.xxx to 192.168.1.1), I'm only getting around 95 MBPS.

It doesn't seem reasonable to me that the brand new router
(https://www.newegg.com/tp-link-tl-r605/p/0E6-002W-006W7?Item=9SIA7ABJSG5198)
would choke the throughput so much.

I've turned off all the "extra" features of the router, but this had no
impact.

Anybody got any comments, ideas, or suggestions?

TIA!


___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
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___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug

___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug