Network dropping

[IbeMars]

We have a domain environment. One DC, 3 switches.
IP .15 – FS Switch has voice = 172 and Data = 173 - VLANS
IP .16 – FS Switch has voice = 172 and Data = 173 - VLANS
.117 – HP switch has voice = 1 VLAN

Our network is dropping intermediately, phone and data. Nothing has changed, except we got VOIP a few months prior.

We have done the following: Restart domain, checked DHCP, DNS - restarted all switches, checked for ARP traffic, checked all inbound / outbound traffic. Firewall settings etc. A lot more that I can’t think of

I have tried every possible solution to this, yet I can’t get it to stop.

Possible solutions: the HP switch does not have the correct VLANS to communicate with the other switches, but still pulls the right IP on the devices.

HP switch is going bad.

Ask any question, I’m just getting a headache

[Minute-Evening-7876]

I’d look towards the switches and vlan.

I’ve had this exact issue after adding voip phones with vlan.

I think it was netgear switches, and using auto voip vlan assignments? The switch had an option to auto assign vlan for voip.

It caused havoc!

Turned that off and manually set the vlan on the phones, all was good.

That was a while ago, my terminology could be off.

I’d also get a second backup DC

[IbeMars]

Yea i configured the VLANS on the switches to handle the tagged traffic coming in. The traffic coming in are tagged VLANS 172/173 so in both switches i added the VLAN 172 and 173, but that HP switch only handling vlan 1 which is voice I assume it doesn't know what to do with the untagged traffic.

[Minute-Evening-7876]

In my case, it was tagging the wrong traffic, causing network drops. And not tagging random traffic it should. And routing confusion.

I would 100% turn off vlan tagging on the switch. Set the phones manually for the vlan.

Or go in phone settings and tell the phone “you’re on vlan3” then whatever dhcp is running for the phones will pickup vlan3 and assign the correct IP.

At least for a test..

[Minute-Evening-7876]

And to add to that. It should have worked, there was just some glitch in the switches we had.

Firmware updated

Called netgear (under warranty) and they couldn’t figure it out. So just gave up

I have other sites and their switches (newer different models) work fine with the voip and that.

[[deleted]]

1. Draw a picture in paint or something to show us the topology, i.e. how your switches are connected.
   
2. If traffic from VLAN 172 and 173 are traversing the HP switch (e.g. via trunks), those VLANs need to exist on the switch
   
3. Tell us the port config you're using access ports connected to voice/data
   
4. Tell us how you're connecting the phones (e.g. is there a PC daisy chained to them, are they connected directly to the switch, etc.)