Hey guys, hope everyone’s doing well. This is my first time posting in here, but I was scrolling and everyone seems pretty chill and people have gotten their issues resolved, so hopefully I can have the same outcome.

So basically, we have AT&T Wi-Fi at home — I believe it’s fiber since download and upload speeds match. We’re on the 1000/1000 plan. I have my own PC work/gaming setup (one PC, two monitors), and since my room is pretty far from the router, I had someone come install an Ethernet run from the router that goes outside the house, along the outer line under the roof (so it stays dry), secured with zip ties, then comes into my room and connects to a small box with Ethernet plugins that I connect my devices to.

When everything first got set up, I was getting around 940-950 down/up on Ethernet in my room, and everything was running smooth. Yesterday my internet felt off — I was downloading a game on Steam and it was going way slower than usual. I ran a speed test and got around 80 upload, 90 download.

I’m not totally sure how long this has been happening, since I only ran the speed test yesterday. I’ve been busy and hadn’t played any games in a while, so I was just doing normal tasks and never noticed. The only reason I caught it was because the game download was taking way longer than usual.

Since we’re still paying for the 1000 plan, I checked my mom’s phone and it still tested at 1000. I checked my Ethernet cable and everything looked fine — even the adapter settings on my computer showed the link speed as 1000/1000 receive/transmit. So the connection itself seems fine, I’m just not getting the speeds I’m paying for.

I contacted AT&T and they said we have too many devices on the Wi-Fi. I get that, but we’ve had roughly the same number of devices (around 40) since I first got the plan — and it’s not all computers, mostly phones, a few TVs, iPads, and laptops that get used here and there, not constantly streaming or downloading. I’m the one who uses the internet the most, which is why I had the Ethernet setup done in the first place since I work from home.

Shouldn’t being on Ethernet bypass the device cap and still give me close to my 900s, even if the 1000 plan is designed for around 20 devices max? For reference, my mom’s phone gets around 900 on a speed test, but my phone gets the same low 80-90 as my computer.

Is there anything I can do to prioritize my computer, or figure out what’s actually causing this?

Thank you

Hi all,

I have been selected for Infosys' second round, i.e., the face-to-face round. I am not sure whether it is a managerial round or a combination of a technical and managerial round. And also, you can suggest things I should do and things I should avoid.

Looking forward to your reply.

I have a requirement to find an AP with the best range within the budget, but have some quirks.

• The use case is to set up a private network within a co-working environment.
• Network needs to set up in the private office (cannot wall mount or ceiling mount; desktop or tucked under a desk only). Cannot do meshes.
• No need for routing. That functionality is handled by a pfSense box.
• Important: The wireless network needs to be reached when at the common area as well which is about 70-100ft away from the private office and through office partitions and some tick concrete walls.
• I started with Unifi UX7 - signal drops after 20-30 ft.
• My current options are Asus BE-86U (havent tried yet; but that is the budget; ~280 CAD).

Any suggestions are welcome.

hello people i really need help, i am like a toddler when it comes to electrical devices and network related stuff. so my ethernet setup looks like this: i have a white little box thats supposed to strengthen the signal of the internet with radio waves or whatever, it lays on my floor across the room, face side down where its closest to the main router located downstairs in the bathroom. This was done by an IT guy who also happened to build my old pc, and with every problem we’ve had so far he’s been reliable, but this was the only option he gave me and told me is gonna work to give me internet, which i doubt in this modern world is true. It is connected to my pc through an ethernet cable, it’s plugged into the LAN1 port on the white box, and for about half a year it’s been working decently, tho i frequently had to restart the adapter, and a lot of the time even when i had internet connection, it kept getting really weak every 10-20 seconds, disconnecting me from calls and games, doing this for an hour at times. I would like a solution to this dhcp problem, and if anyone has advice as to what i should do about my internet to get a stable connection that i can consistently game with, with little to no interruptions i would be really grateful:)

Forgive me if there's some fragmentation to this. I'm a long-time tech professional (Sysadmin) but have never focused on networking, and my head hurts banging it against this problem.

I'm setting up a network for a rural church near me that is trying to get something more reliable than the collection of unmanaged Arista APs and power-line networking devices broadcasting their own networks too. The parts list:

• Ubiquiti UniFi Pro PoE 24-Port Gigabit Managed PoE Network Switch with SFP+
• Ubiquiti UniFi Dream Machine Pro
• Ubiquiti UniFi U7 Pro Tri-Band Wi-Fi 7 Access Point
• Ubiquiti UniFi U7 Lite Dual-Band Wireless Access Point

Along with cabinet, UPS, cables, and other accessories.

All the cable runs have been made and test OK and the hardware mounted and shows in the console. All devices are updated to the latest stable firmware. Internet is via Comcast, and I haven't ruled Comcast out as a culprit. The problem is...

The Problem

Both LAN and WAN connectivity drops frequently.

At the location, connected to the new wireless networks it can take a few minutes for the connected device to report there's internet available over the connection. Until then it'll say whatever variant of "Connected but no internet" is appropriate for the device (Windows laptops and Android phones mostly in my testing).

I keep strong and stable connection with the UDM/site when hardwired to the UDM or the Switch, connecting to is using the UDM's gateway IP, but internet still tends to drop.

Connected using the UI app or in a browser at unifi.ui.com either there at the location or remotely I see the network showing UP in Site Manager, but connecting to that specific network it usually times out a couple times before it connects. This makes me think it's related to internet, but, besides reporting high latency (30ms instead of the typical 10-15ms) once or twice each day, the UDM never reports upstream WAN/Internet issues and uptime on the internet connection is 100%.

Last Friday I deleted all the Networks and WiFi profiles I'd configured in Unifi and recreated them, in case I'd messed something up there, but the symptoms persist.

A friend mentioned some bug related to the captive portal configuration had given him similar symptoms on his own network, and suggested the portal may need to be configured and then deleted to undo the bug, but that hasn't helped.

What should I check? What issue am I missing? Help me, Obi Wan. You're my only hope!

hello good people

I have this question that comes on my mind is about that i connected my DVR to the router that is connected to the ISP, because I want to monitor the place remotely via the app on my phone.

I know my whole traffic is transferred to the ISP site, so I am wondering if he can act like the man in the middle and sniff my videos?

I am using a Dahua DVR, and the app is DMSS

Been reading through a bunch of public postmortems (from Dan Luu's list). Learnt a ton, but noticed it's almost entirely cloud/big-tech writeups, basically nothing from enterprise, campus, or ISP networks.

I'm a grad student right now, and I'm really curious as to what that world actually looks like: what's the last thing that broke on your network, and what's the part of your job that frustrates you the most ? I want to learn more about real world network configuration, and I would really appreciate any answers, and would love to have discussions!

Thanks!!

Recently, I wanted to have hands on experience on servers like windows server 2019,2022,2025 downloaded the 2022 edition but stuck with what to do next any suggestions or labs to practice.

Hey everyone,
I am having a frustrating issue with my old TP-Link TL-WR740N router (from around 2017) and could really use some advice.

My Setup:
I have an ISP-provided fiber modem (ONU/ONT) connected to my TP-Link router. The modem does not have its own Wi-Fi.

Both the modem and the router are plugged into the same spikeguard/surge protector for power.

The Issue:

For the first 4–5 years, this router worked flawlessly on my old connection. However, a couple of years ago, my ISP upgraded me to a fiber optic cable. Since then, I’ve been experiencing frequent disconnections across all devices (phones, laptops, etc.).

Symptoms: All devices remain connected to the Wi-Fi signal, but it suddenly shows "No Internet."
Router lights: The lights remain normal (no orange/red error lights).

Specific device issue: Older OnePlus devices drop the Wi-Fi entirely and refuse to reconnect until the router is restarted.

Temporary fix: I have to power-cycle the TP-Link router (turn the switch off and on after 5–10 seconds) to get the internet back.

What I want to know:

Is this 2017 router simply too old to handle the high data throughput/packet load of modern fiber, causing its memory/CPU to crash and freeze?

Could the spikeguard be causing slight voltage drops that freeze the router when it is under load, even though the lights stay on?

Are there any specific settings (like DHCP lease time, changing DNS, or adjusting channel width) I should tweak before throwing it away?

Any troubleshooting steps or explanations would be highly appreciated! Thanks in advance.

i was playing a game and all of the suddon my ping was getting really bad and started spiking. i pinged my wifi router and got this

```Pinging 10.0.0.1 with 32 bytes of data:

Reply from 10.0.0.1: bytes=32 time=2ms TTL=64

Reply from 10.0.0.1: bytes=32 time=2ms TTL=64

Reply from 10.0.0.1: bytes=32 time=2ms TTL=64

Reply from 10.0.0.1: bytes=32 time=1ms TTL=64

Reply from 10.0.0.1: bytes=32 time=4ms TTL=64

Reply from 10.0.0.1: bytes=32 time=3ms TTL=64

Reply from 10.0.0.1: bytes=32 time=3ms TTL=64

Reply from 10.0.0.1: bytes=32 time=2ms TTL=64

Reply from 10.0.0.1: bytes=32 time=1ms TTL=64

Reply from 10.0.0.1: bytes=32 time=2ms TTL=64

Reply from 10.0.0.1: bytes=32 time=5ms TTL=64

Reply from 10.0.0.1: bytes=32 time=3ms TTL=64

Reply from 10.0.0.1: bytes=32 time=3ms TTL=64

Reply from 10.0.0.1: bytes=32 time=48ms TTL=64

Reply from 10.0.0.1: bytes=32 time=130ms TTL=64

Reply from 10.0.0.1: bytes=32 time=88ms TTL=64

Reply from 10.0.0.1: bytes=32 time=59ms TTL=64

Reply from 10.0.0.1: bytes=32 time=2ms TTL=64

Reply from 10.0.0.1: bytes=32 time=2ms TTL=64

Reply from 10.0.0.1: bytes=32 time=76ms TTL=64

Reply from 10.0.0.1: bytes=32 time=124ms TTL=64

Reply from 10.0.0.1: bytes=32 time=89ms TTL=64

Reply from 10.0.0.1: bytes=32 time=2ms TTL=64

Reply from 10.0.0.1: bytes=32 time=3ms TTL=64

Reply from 10.0.0.1: bytes=32 time=3ms TTL=64

Reply from 10.0.0.1: bytes=32 time=3ms TTL=64```

i have no idea why its doing this

I'm trying to understand a routing scenario I've encountered with a game server.

An address, 162.249.72.5 (AS6507, within 162.249.72.0/21), is used as the UDP endpoint for an EUW game.

Several IP geolocation databases place this address in Los Angeles, California. However, traffic from Europe reaches it with latency consistent with a European endpoint, so the packets clearly aren't making a normal round trip to California.

I'm familiar with BGP at a basic level, but I'm having trouble understanding what the underlying architecture would be.

What mechanisms can make a public unicast-looking IP behave this way?

For example, would this normally involve:

• the prefix being announced from multiple geographic locations;
• anycast;
• more-specific BGP announcements;
• ISP-specific routing/peering;
• or some mechanism after the traffic enters the provider's network?

I'm not assuming that anycast is being used in this particular case. I'm trying to understand what mechanisms are capable of producing this behaviour.

I can see the traffic in Wireshark and have confirmed the destination IP, but I'm deliberately not posting my complete traceroute because the visible private 10.x.x.x hops could reveal information about my ISP's internal topology.

I'm mainly interested in the BGP/routing architecture that can make this possible.

I recently bought a home that is 3 storeys plus basement. The modem/router is in the basement so the wifi signal on the top floor is relatively weak.

The house is completely wired from top to bottom with CAT 6E Ethernet so all the ports are now connected, I'm just wondering with that kind of set up-- where I can plug in each individual router/wifi booster into hardline ethernet, what is the best type of router system I should get? Most seem to boost a wifi signal, but if I can plug in a router to Ethernet on each floor is there a better product I should be looking at?

All I have right now is the modem/router from my ISP and a NETGEAR unmanaged switch to distribute internet to all the ethernet hookups. But I would like a solid wifi signal everywhere in the house as well.

Thanks in advance for your help!

So I have a serious input delay/inconsistent internet connection issue while being wired into my devices via ethernet cable. At first i began to think it was just the servers to the video games that I am connecting to, but shortly found out after visiting multiple friends that have the same internet as me this was untrue. Modem is a Netgear CM1000 and router is a Netgear RAX45. One thing I notice is that the downstream light on my modem is constantly blinking but the internet connection is working. Outside of this I dont have much more information but i would really appreciate some help on troubleshooting this issue. The ethernet cables are Cat6 btw.