I recently came across this post which proved very interesting when Polycom phones use Cisco LLDP-MED to configure a dedicated Voice VLAN and the switch is also providing PoE.The issues arrised due to incompatability between the power states a phone goes through and the Cisco being a little too clever. The phone moves up the power states too quickly and the Cisco kills the port because it thinks there is a power spike and hence the phone reboots.The only quick option is to turn off LLDP-MED globally on the Cisco kit and go back to using the DHCP Option method of assigning a Voice VLAN (see this article).However on doing a little more digging you could always turn off LLDP-MED for power management on a port by port basis using the following:interface interface-id
no lldp med-tlv-select power-management
Browse latest info tech news and developments
Our blog publishes bite-sized IT focused articles that offer an easy-to-read insight into ways you can improve your business, communication and operation.
Showcasing developments in the IT industry, practical advice, and time and money saving tips, it’s worth subscribing to stay up to date with the news that matters.