Multiple Devices Attached To The Port; Persistent Auto Smartport Interface - Cisco 500 Series Administration Manual
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Smartport
Auto Smartport
NOTE
Cisco 500 Series Stackable Managed Switch Administration Guide
LLDP Capabilities Mapping to Smartport Type (Continued)
Capability Name
Reserved
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
•
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 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
LLDP Bit
Smartport Type
12-16
Ignore
Switch
Smartport type is used.
Configuring LLDP
12
and
222
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