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Solved
VLAN splitted IT and Telephone configuration
Dear Community, I'm currently setting up a configuration and this point the problem is that the telephones do not send their DHCP Request to the Router behind the Switch. I assume this might be a...
Just following-up on this. I inquired your concern to a higher tier of NETGEAR Support as well as the options mentioned by your vendor and here is the feedback I got:
=====================================
Both of the vendor comments are correct, but they are depending on how you use the phones:
Option 1 is only valid if the PC connects into a LAN port on the phone, and the phone connects into the switch, this would be using a Tagged port on the switch. It seems that you will not use this. In this option the PVID is not relevant as PVID is not relevant on a Tagged port.
Option 2 is also possible to work and in this setup, the untagged port must be set with the correct PVID (assuming it is 3).
Going back to your original post, it mentions that ports 37 to 46 are untagged VLAN 3, yet it doesn’t have a PVID of 3, so effectively they are still operating as untagged in VLAN 1.
Kindly set these ports (which contain phone and the router for the voice network) to be Untagged in VLAN, and also set the PVID to 3 and let us know the outcome.
This port 37 on your config, there is no PVID set, so default is 1
interface 0/37
vlan participation auto 1
vlan participation include 3
exit
This is sample port 23 with PVID set to 100 from the lab switch:
interface 0/23
vlan pvid 100
vlan participation include 100
exitRegards,
DaneA
NETGEAR Community Team
You are right. All IP phone ports should set as tagged ports on VLAN 3. Since the MPLS router is not VLAN-aware then leave that port as untagged.
Regards,
DaneA
NETGEAR Community Team
Update: according to Unify (Vendor: of Telephone System and Telephones) you can either:
Option1
- the Voice-Vlan on the Port where you have a PC connected behind the Phone is tagged.
- the Data-Vlan on the same Port is then untagged
- all Ports where central components (Like Gateway, Routers) for the Voice-Vlan are connected to are Voice-Vlan untagged
or
Option2
- the Voice-Vlan ports are untagged where you only have a Phones connected to.
- the Data-Vlan ports are untagged where you only have PCs connected to
- all Switchports where central components (Like Gateway, Routers) for the Voice-Vlan are connected to are Voice-Vlan untagged
the second option is what I wanted to go for but at the moment I just want to get this running and i'm trying both. but I dont think its a big deal.
Yet it would be interessting to understand if Netgear supports the second option at all?
at this point I'm still struggeling with the DHCP provisioning of Telephones.
Our Voice Network is over multiple Sites and I have seperate IP-subnet for each.
We have one DHCP at the main site and DHCP Forwarders / Helpers on each site Router that forwards requests to the Main-DHCP.
The DHCP-Server is configured to provide IPs out of the range definded for each Site.
The Servers gets the DISCOVER from the Telephone and send the OFFER but then the Client never sends a REQUEST ...
Unify says that there Voice-IP-Solutions don't support DHCP "Superscopes" which is what i'm trying to build up ... at least I think so...
Either I place a DHCP Server in every Site. (nope)
oder I modify the Voice-Network to be one big transparent IP-Subnet... instead of multiple 24-Bit Subnets I would use one big 21-Bit Subnet for all Phones over all Sites.
Kind Regards,
Michael
Just following-up on this. I inquired your concern to a higher tier of NETGEAR Support as well as the options mentioned by your vendor and here is the feedback I got:
=====================================
Both of the vendor comments are correct, but they are depending on how you use the phones:
Option 1 is only valid if the PC connects into a LAN port on the phone, and the phone connects into the switch, this would be using a Tagged port on the switch. It seems that you will not use this. In this option the PVID is not relevant as PVID is not relevant on a Tagged port.
Option 2 is also possible to work and in this setup, the untagged port must be set with the correct PVID (assuming it is 3).
Going back to your original post, it mentions that ports 37 to 46 are untagged VLAN 3, yet it doesn’t have a PVID of 3, so effectively they are still operating as untagged in VLAN 1.
Kindly set these ports (which contain phone and the router for the voice network) to be Untagged in VLAN, and also set the PVID to 3 and let us know the outcome.
This port 37 on your config, there is no PVID set, so default is 1
interface 0/37
vlan participation auto 1
vlan participation include 3
exit
This is sample port 23 with PVID set to 100 from the lab switch:
interface 0/23
vlan pvid 100
vlan participation include 100
exitRegards,
DaneA
NETGEAR Community Team
Hello,
I can confirm that using Option 2 using untagged Ports to central Routers and Telephones works WHEN the Voice Vlan is explizit set on the Ports in the PVID Menu additionally.
I dont understand why this extra setting is needed on Netgear devices but its okay to deal with, when you know what is important.
Thank you all for your support and advice.
With Kind regards,
Michael
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