Smartport
Auto Smartport
166 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)
11
NOTE If only the IP Phone and Host bits are set, then the Smartport type is
ip_phone_desktop.
Multiple Devices Attached to the Port
The device derives the Smartport type of a connected device via the capabilities
the device advertises in its CDP and/or LLDP packets.
If multiple devices are connected to the device through one interface, Auto
Smartport considers each capability advertisement it receives through that
interface in order to assign the correct Smartport type. The assignment is based
on the following algorithm:
•If all devices on an interface advertise the same capability (there is no
conflict) the matching Smartport type is applied to the interface.
•If one of the devices is a switch, the

Switch

Smartport type is used.
•If one of the devices is an AP, the Wireless Access Point Smartport type is
used.
•If one of the devices is an IP phone and another device is a host, the
ip_phone_desktop Smartport type is used.
•If one of the devices is an IP phone desktop and the other is an IP phone or
host, the ip_phone_desktop Smartport type is used.
•In all other cases the default Smartport type is used.
For more information about LLDP/CDP refer to the Configuring LLDP and
Configuring CDP sections, respectively.
Persistent Auto Smartport Interface
If the Persistent status of an interface is enabled, its Smartport type and the
configuration that is already applied dynamically by Auto Smartport remains on
the interface even after the attaching device ages out, the interface goes down,
and the device is rebooted (assuming the configuration was saved). The
Smartport type and the configuration of the interface are not changed unless Auto
Smartport detects an attaching device with a different Smartport type. If the
Reserved 12-16 Ignore
LLDP Capabilities Mapping to Smartport Type (Continued)
Capability Name LLDP Bit Smartport Type