What you’re seeing
- PCs on the staff network cannot reach a printer, NAS or server that now lives on another VLAN.
- VoIP phones on a voice VLAN register, but users cannot use the phone's web page or app from their desks.
- Each VLAN reaches the internet fine, yet devices on different segments cannot see each other.
- Network discovery features such as AirPlay, Chromecast or printer auto-discovery no longer find devices.
- Pings between segments time out, or connections work one way but not the other.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- No device is routing between the VLANs, or the router only has an interface on one of them.
- Firewall rules block traffic between segments by default, which is often intentional but too strict.
- Switch trunk ports between switches or to the firewall are missing some VLANs.
- Devices on one VLAN have the wrong default gateway or were given a static address from the old network.
- Discovery protocols such as mDNS and SSDP do not cross VLAN boundaries without a relay or reflector.
- Servers or printers have their own host firewalls that only accept connections from their local subnet.
Why it matters
Splitting a network into VLANs is a smart security move, keeping guests, cameras, phones and staff apart. But if the separation is not planned carefully, everyday tasks break: people cannot print, scan to folders, reach the accounting server or manage phones. The team either works around it or asks for the segmentation to be removed, which undoes the security benefit. Getting the rules right preserves both the protection and the productivity.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
Didn't VLANs make our network more secure?
Yes, when done properly. The goal is to allow only the traffic that needs to cross between segments, not to block everything or allow everything.
Why can my computer reach the internet but not the printer?
Internet traffic goes out through the gateway, which works on every VLAN. Reaching a device on another VLAN needs a specific route and rule between those segments.
Can AskTechGurus fix our VLAN setup?
Yes. A certified US engineer reviews your switches and firewall rules through a remote secure session, starting at $99, and you pay only when the right devices can talk to each other.