E4200 is slow, YouTube HD videos

I have the cable @ 15Mbps down, 2Mbps upward. The cable line comes in the attic in my daylight basement. I have 3 Cat-5 cables, running through the House. 1 in the TV downstairs and then 1 to 2 rooms upstairs (which is my home office). In the Home Office, the Cat-5 is connected to a switch 24 ports. I plug my computer printer, NAS, etc. in this switch.

I have a WRT54G2 v1 I used in my router/access point.

I have a 1st & 3rd generation iPad. 3 bed iPad videos from YouTube in HD. About 6 weeks ago I started having some slow YouTube video playback on my iPad. They would play a few seconds, then pause to buffer, etc.. It was the videos started playing almost immediately and would never buffer.

With Wifi Analyzer for Android, I noticed that my neighborhood is saturated with wifi 2.4 GHz. So, I thought that the 2.4 Ghz band is saturdated and if I moved to a 5 GHz band, the buffering of YouTube would be fixed.

So, I bought an E4200 (v1 I think) Amazon. I bought this router/access point because it supports the 5 GHz band. He had also some other nice features like a separate comments wifi network.

I have it plugged into my cable modem and installing everything. Always slow YouTube, and now YouTube videos are slow on my laptop (connected via ethernet). I still get ~ 15Mbps via ethernet or wifi using the speed test page provided by my ISP, but YouTube videos are VERY slow.

Today, I called my ISP today and they made me plug my laptop directly into the modem. I was surprised to see 1080 p YouTube videos load quickly and never buffer.

So, I returned to my WRT54G2 and plugged my laptop. Always get quick videos.

At this point, I now use the WRT54G2 as my router/access point, and I have configured my E4200 as an AP and plugged into ethernet.

I'm on my iPad connected to the strip of the 5 GHz on the E4200, which is connected to the WRT54G2 using ethernet, and I can watch YouTube videos without problem.

It seems that when the E4200 is used as a router, I'm getting poor performance of YouTube. My speed on other sites seemed to go well, including video streaming from Amazon.

I really want to use the E4200 as my router/access point because it allows the network to comments. And then I set up the WRT54G2 as Access Point to provide the best coverage WiFi and connect it to the switch in my home office (because it is higher in the House, I suspect it would provide a stronger signal).

My question is: is this a configuration issue with the E4200? Or is it possible the E4200 is defective and I should send him a replacement?

It turned out that the DIF is that YouTube does not like a MTU of 1500. I dropped it to 1 460 and it works much better. I would like to know if there is a bigger problem however.

Tags: Linksys Routers

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