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Tech Tip: CER support for Extension Mobility and 3rd party switches
CER does not support any non-Cisco LAN switches for CDP or CAM-based discovery. You can use IP subnet location discovery with any vendor's LAN switches, but you need to manually add phones connected to unsupported switches. However, you cannot manually add a phone that is used with Extension Mobility because a user can log into any phone and the phone is assigned the user's extension. With manually-defined phones, you are defining the phone based on an extension, not a device, so the extension of the logged-in person does not get assigned the appropriate ERL. You need to ensure that all phones used with Extension Mobility are connected to supported switch ports.
Tere Stevens ----- Unified Communications PDI Team www.cisco.com/go/pdihelpdesk