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https://www.tek-tips.com/viewthread.cfm?qid=1271386
Aug 30, 2006 · Why aren't these phones smart enough to pick up a voice vlan from teh Cisco device? Is there a way to remedy this? CDP is a security risk anyway, and if I want to turn it off, now I can't because the Polycom phones rely upon it. Any help/direction would be greatly appreciated.
https://community.polycom.com/t5/VoIP-SIP-Phones/FAQ-Utilizing-VLAN-s-with-Polycom-phones/td-p/38100
Polycom phones have the ability to utilize VLAN's Note: If CDP or LLDP is active on a Switchport the DHCP VLAN discovery will not be used! For a more Plantronics + Polycom.
https://community.polycom.com/t5/VoIP-SIP-Phones/Disable-LLDP-and-CDP/td-p/92284
Re: Disable LLDP and CDP. Hello Polycom Quest, welcome to the Polycom Community. The community's VoIP FAQ contains this post here: May 03, 2017 Question: Can I disable CDP or LLDP on the phone? Resolution:See Option 2 for example screenshots => here <= for the VLAN menu.
https://support.polycom.com/content/dam/polycom-support/products/voice/polycom-uc/other-documents/en/2016/rp-trio-ucs5-4-2aa-tn1291.pdf
the RealPresence Trio, and disabled CDP, the RealPresence Trio system will use the native VLAN for that port instead of the Voice VLAN. Workaround While Polycom recommends upgrading to UC Software 5.4.2AB, Polycom UC Software 5.4.2AA can be used in the problem environment if the ‘PoE PSE Power’ and ‘USB Charging’ features are disabled.
https://community.polycom.com/t5/VoIP-SIP-Phones/Parameters-such-as-cdp-enabled-not-always-changed-via-central/td-p/98208
The title Polycom Employee & Community Manager is an automatic setting within the community and any forum reply or post is based upon my personal experience and does …
http://support.polycom.com/content/dam/polycom-support/products/Voice/realpresence_trio/release-notes/en/rp-trio-relnotes-v5-4-5-rev-ag.pdf
The RealPresence Trio system does not support power negotiation over Cisco Discovery Protocol (CDP) with Cisco switches using CDP. CDP is supported for VLAN negotiation. If you are powering RealPresence Trio using an IEEE 802.3af power over Ethernet compliant switch, power budget is negotiated by a hardware handshake at power up - CDP is not used.
https://community.polycom.com/t5/Skype-for-Business/UC-5-4-1-on-VVX-500-don-t-switch-to-the-voice-vlan-CDP-issue/td-p/78290
The title Polycom Employee & Community Manager is an automatic setting within the community and any forum reply or post is based upon my personal experience and …
https://community.arubanetworks.com/t5/Wired-Intelligent-Edge-Campus/How-to-make-CDP-based-IP-phones-fall-in-the-voice-vlan-when/ta-p/166892
Polycom phones send only 3-4 CDP messages hoping that the connected device is CDP capable. If it doesn't receive CDP messages, it assumes that the connected device is not CDP capable and stops sending CDP messages. This times out the Polycom phones from lldp neighbor table and soon they lose the connectivity to the voice vlan. 6.
https://community.polycom.com/t5/VoIP-SIP-Phones/VVX-500-CDP-Link-Down/td-p/53282
We're trying to get confirmation that these Polycom phones do or do not support the 'CDP Link-down notification' feature so that .1x sessions will be purged when a machine unplugs from the data port..
http://support.polycom.com/
WELCOME TO YOUR POLYCOM SUPPORT PORTAL: THINGS YOU SHOULD KNOW How to get support for Plantronics products including Headsets How to get support for OBi products Where to find information on Voice products What model or type of phone do I have? Where to find the product serial number for Polycom products How to set up an IP Network for Video Conferencing More
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