DHCP Server configuration document for Poly VVX-series phones to force registration to ZoomPhone

Forum|Forum|4 years ago
November 16, 2021
3 replies
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Hello,

Could Zoom put a document together on how to configure DHCP Server with supported DHCP options for Poly VVX series phones?

Thanks,

D

djrnb

Newcomer

I don't expect Zoom will document this given Poly is the manufacturer. This may be of some help: https://community.polycom.com/t5/VoIP-SIP-Phones/DHCP-Standardization-160-vs-66/td-p/72577

A

avshchAuthor

Newcomer

Indeed! Why would Zoom help their own customers!? lol Polycom article does not mention how the phones communicate to Polycom ZTP (Zero Touch Provisioning). That's where the problem is with the phones behind a firewall.

BrandonS

Community Champion | Partner

But you don’t use custom DHCP options _and_ ZTP. If ZTP is not working then your firewall is blocking communication to Poly and Zoom servers or a typo of MAC address in your Zoom admin portal. Custom DHCP would be used to ease the provisioning of non ZTP supported phones.

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avshchAuthor

Newcomer

@BrandonS Yup. I know that. I just can't find what's needed (from Firewall perspective) for the phones in order to register to ZTP. Was not able to find anything on Poly site. Any ideas?

BrandonS

Community Champion | Partner

Basics are here: https://support.zoom.us/hc/en-us/articles/201362683-Zoom-network-firewall-or-proxy-server-settings

try bypassing your firewall or take a phone home to prove the point. The basic process is that you first enter MAC address in your Zoom admin portal and then factory default phones if not new in box. Then they reach out to Poly’s ZTP server to get provisioning details and then update firmware and register with Zoom. If you have restrictive firewall policies they might be blocking something required for this to work.

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avshchAuthor

Newcomer

I have a ticket with Zoom Support, but they are asking me for the packet capture. Sounds like they don't have any documentation they can provide.

jsteinberg

Community Champion | Employee

Is your question around firewall rules needed, or how to set provisioning addresses via DHCP ?

If you are wanting to do provisioning via DHCP options, you can set the DHCP option ( e.g. option 66 ) to the Zoom Assisted Provisioning URLS., which you can see here https://support.zoom.us/hc/en-us/articles/360038910791-Assisted-provisioning-URLs

Firewall requirements are listed here - https://support.zoom.us/hc/en-us/articles/201362683-Zoom-network-firewall-or-proxy-server-settings