Using CDP/LLDP Information to Identify Smartport Types

The switch detects the type of device attached to the port, based on the CDP/ LLDP capabilities .

This mapping is shown in Table 2 and Table 3.

Table 2 CDP Capabilities Mapping to Smartport Type 

Capability Name

CDP Bit

Smartport Type

Router

0x01

Router

TB Bridge

0x02

Wireless Access Point

SR Bridge

0x04

Ignore

Switch

0x08

Switch

Host

0x10

Host

IGMP conditional filtering

0x20

Ignore

Repeater

0x40

Ignore

VoIP Phone

0x80

ip_phone

Remotely-Managed Device

0x100

Ignore

CAST Phone Port

0x200

Ignore

Two-Port MAC Relay

0x400

Ignore

Table 3 LLDP Capabilities Mapping to Smartport Type 

Capability Name

LLDP Bit

Smartport Type

Other

1

Ignore

Repeater IETF RFC 2108

2

Ignore

MAC Bridge IEEE Std 802.1D

3

Switch

WLAN Access Point IEEE Std 802.11 MIB

4

Wireless Access Point

Router IETF RFC 1812

5

Router

Telephone IETF RFC 4293

6

ip_phone

DOCSIS cable device IETF RFC 4639 and IETF RFC 4546

7

Ignore

Station Only IETF RFC 4293

8

Host

C-VLAN Component of a VLAN Bridge IEEE Std 802.1Q

9

Switch

S-VLAN Component of a VLAN Bridge IEEE Std 802.1Q

10

Switch

Two-port MAC Relay (TPMR) IEEE Std 802.1Q

11

Ignore

Reserved

12-16

Ignore