U

Visitor

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2 Messages

Sun, Aug 7, 2022 3:51 AM

Wifi is great, Wired network is super slow and disconnects

Hi folks,

My desktop / backup computer is on wired Ethernet connected to Comcast router.  When I backup my laptop to it, I use a wired connection through the router / modem rather than WiFi for security purposes.  I use teamviewer  for personal use (the download version). This used to work fine.  I used to use this just fine.  Now, when I try to connect the two computers, it either connects ok, then gets very slow, or just starts and goes very slow.  I am talking less than 1 K/second.  My internal wired network should be faster than WiFi (100 MB/Second?) .  It is so slow the connection disconnects several times per minute.  I am wondering if Comcast is treating file transfer across the wired network like a download and throttling it, but I can download Linux ISOs across wireless.  We are talking data rates of < 200 bytes/ second here.  Anybody?

thanks

user_94ed99

Visitor

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2 Messages

2 m مضت

Hi, c

I would also like to know what will happen if I connect those computers across a 100mb dumb switch and uplink to the modem / router.  My main question  there is will Comcast / the router / modem shut the uplink port off when internet traffic from multiple local IP addresses comes across the uplink port (I know this is done on some corporate networks).  Basically what I am asking is "can I set up a local network and uplink to the Internet through the Comcast Router"?

XfinityChe

Official Employee

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6.5K Messages

2 m مضت

Hello @user_94ed99! Thank you for posting to the Xfinity Community Forum. By chance, do you happen to have Advanced Security enabled? If so, can you disable it to see if it makes a difference and if it doesn't turn it back on? Have you tried Port Forwarding

flatlander3

Problem Solver

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536 Messages

2 m مضت

@XfinityChe  port forwarding?  Seriously dude?  Do you know what that does?  Perhaps try google.

@user_94ed99 , as long as the wireless and wired machines are on the same subnet (configured correctly) and you're not stomping on IP addresses (two machines with the same IP address), you should be able to sling all the data you want between them, they're just local machines.   Generally, windows will tell you if someone is using it's IP address.

A bad Ethernet port can happen.  Usually, it's not on the device side.   Switches can go bad though.  Cables can too.  If possible, I'd try a cable swap first.  Hardware negotiates that speed connection.  If the speed bounces or the link is dying, it may be shifting speeds constantly.   Try a different port on the gateway too.  On Xfinity gear, the one with the orange/red stripe is a 2.5Gbps port, the others are 1Gbps ports.  Try one of those (perhaps their 2.5Gbps is flaky). 

If you are using an unmanaged switch on wired devices, try removing that as well when you are debugging (cable change first, try a different gateway port, then take the switch out out of the setup).  See if anything helps.  You may have bad ports on your gateway too.

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