Table of Contents
Advertisement
10
NOTE
179
In addition to enabling Auto Smartport globally, you must enable Auto Smartport at the desired
interface as well. By default, Auto Smartport is enabled at all the interfaces.
See
Voice VLAN
for more information on enabling Auto Voice VLAN
Identifying Smartport Type
If Auto Smartport is globally enabled (in the
Interface Settings
page), the device applies a Smartport macro to the interface based on the
Smartport type of the attaching device. Auto Smartport derives the Smartport types of
attaching devices based on the CDP and/or LLDP the devices advertise.
If, for example, an IP phone is attached to a port, it transmits CDP or LLDP packets that
advertise its capabilities. After reception of these CDP and/or LLDP packets, the device
derives the appropriate Smartport type for phone and applies the corresponding Smartport
macro to the interface where the IP phone attaches.
Unless Persistent Auto Smartport is enabled on an interface, the Smartport type and resulting
configuration applied by Auto Smartport is removed if the attaching device(s) ages out, links
down, reboots, or if the attached device receives conflicting capabilities. Aging out times are
determined by the absence of CDP and/or LLDP advertisements from the device for a
specified time period.
Using CDP/LLDP Information to Identify Smartport Types
The device detects the type of device attached to the port, based on the CDP/LLDP
capabilities.
This mapping is shown in the following tables:
CDP Capabilities Mapping to Smartport Type
Capability Name
Router
TB Bridge
SR Bridge
Switch
Host
IGMP conditional filtering
Repeater
Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x
Properties
page), and at an interface (in the
CDP Bit
Smartport Type
0x01
Router
0x02
Wireless Access Point
0x04
Ignore
0x08
Switch
0x10
Host
0x20
Ignore
0x40
Ignore
Smartport
Auto Smartport
Hide quick links:
Advertisement
Table of Contents
