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Powered Devices. These devices include VoIP phones, IP cameras, and wireless

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Managing Power-over-Ethernet Devices PoE on the Switch 11 You can decide the following: • Maximum power a PSE is allowed to supply to a PD • During device operation, to change the mode from Class Power Limit to Port Limit and vice versa. The power values per port that were configured for the Port Limit mode are retained. • Maximum port limit allowed as a per-port numerical limit in mW (Port Limit mode). • To generate a trap when a PD tries to consume too much and at what percent of the maximum power this trap is generated. The PoE-specific hardware automatically detects the PD class and its power limit according to the class of the device connected to each specific port (Class Limit mode). If at any time during the connectivity an attached PD requires more power from the switch than the configured allocation allows (no matter if the switch is in Class Limit or Port Limit mode), the switch does the following: • Maintains the up/down status of the PoE port link • Turns off power delivery to the PoE port • Logs the reason for turning off power • Generates a trap to a remote log server CAUTION Consider the following when connecting switches capable of supplying PoE: The PoE models of the Sx200, Sx300, and Sx500 series switches are PSE (Power Sourcing Equipment) that are capable of supplying DC power to attaching PD (Powered Devices). These devices include VoIP phones, IP cameras, and wireless access points. The PoE switches can detect and supply power to pre-standard legacy PoE Powered Devices. Due to the support of legacy PoE, it is possible that a PoE switch acting as a PSE may mistakenly detect and supply power to an attaching PSE, including other PoE switches, as a legacy PD. Even though Sx200/300/500 PoE switches are PSE, and as such should be powered by AC, they could be powered up as a legacy PD by another PSE due to false detection. When this happens, the PoE switch may not operate properly and may not be able to properly supply power to its attaching PDs. To prevent false detection, you should disable PoE on the ports on the PoE switches that are used to connect to PSEs. You should also first power up a PSE device Cisco Small Business 200 Series Smart Switch Administration Guide 151

Section	Page
Getting Started	7
Starting the Web-based Switch Configuration Utility	7
Quick Start Switch Configuration	11
Interface Naming Conventions	11
Window Navigation	13
Viewing Statistics	17
Viewing Ethernet Interfaces	17
Viewing Etherlike Statistics	18
Viewing 802.1X EAP Statistics	19
Managing RMON	21
Managing System Logs	24
Setting System Log Settings	24
Setting Remote Logging Settings	26
Viewing Memory Logs	27
Managing System Files	29
Types of System Files	29
Upgrade/Backup Firmware/Language	32
Downloading or Backing-up a Configuration or Log	34
Viewing Configuration Files Properties	37
Copying Configuration Files	38
DHCP Auto Configuration	39
General Administrative Information	43
Switch Models	43
System Information	45
Rebooting the Switch	47
Monitoring the Fan Status and Temperature	48
Defining Idle Session Timeout	48
Pinging a Host	49
System Time	51
System Time Options	52
SNTP Modes	53
Configuring System Time	54
Managing Device Diagnostics	61
Testing Copper Ports	61
Displaying Optical Module Status	63
Configuring Port and VLAN Mirroring	64
Viewing CPU Utilization and Secure Core Technology	66
Configuring Discovery	68
Configuring Bonjour Discovery	68
LLDP and CDP	69
Configuring LLDP	70
Configuring CDP	91
Port Management	100
Configuring Ports	100
Setting Basic Port Configuration	101
Configuring Link Aggregation	103
Configuring Green Ethernet	111
Smartports	118
Overview	118
What is a Smartport	119
Smartport Types	119
Smartport Macros	122
Macro Failure and the Reset Operation	123
How the Smartport Feature Works	124
Auto Smartport	124
Error Handling	128
Default Configuration	128
Relationships with Other Features and Backwards Compatibility	129
Common Smartport Tasks	129
Configuring Smartport Using The Web-based Interface	131
Built-in Smartport Macros	136
Managing Power-over-Ethernet Devices	148
PoE on the Switch	148
Configuring PoE Properties	151
Configuring the PoE Power, Priority, and Class	152
VLAN Management	155
VLANs	155
Configuring Default VLAN Settings	158
Creating VLANs	159
Configuring VLAN Interface Settings	160
Defining VLAN Membership	161
Voice VLAN	165
Configuring the Spanning Tree Protocol	179
STP Flavors	179
Configuring STP Status and Global Settings	180
Defining Spanning Tree Interface Settings	182
Configuring Rapid Spanning Tree Settings	184
Managing MAC Address Tables	187
Configuring Static MAC Addresses	188
Managing Dynamic MAC Addresses	188
Configuring Multicast Forwarding	190
Multicast Forwarding	190
Defining Multicast Properties	193
Adding MAC Group Address	195
Adding IP Multicast Group Addresses	197
Configuring IGMP Snooping	198
MLD Snooping	200
Querying IGMP/MLD IP Multicast Group	203
Defining Multicast Router Ports	204
Defining Forward All Multicast	205
Defining Unregistered Multicast Settings	206
Configuring IP Information	207
Management and IP Interfaces	207
Configuring ARP	219
Domain Name Systems	220
Configuring Security	224
Defining Users	225
Configuring RADIUS	228
Configuring Management Access Authentication	230
Defining Management Access Method	231
Configuring TCP/UDP Services	236
Defining Storm Control	237
Configuring Port Security	238
Configuring 802.1X	241
Denial of Service Prevention	247
Using the SSL Feature	249
SSL Overview	249
Default Settings and Configuration	249
SSL Server Authentication Settings	250
Secure Sensitive Data	252
Introduction	252
SSD Rules	253
SSD Properties	258
Configuration Files	261
SSD Management Channels	266
Menu CLI and Password Recovery	266
Configuring SSD	267
Configuring Quality of Service	270
QoS Features and Components	271
Configuring QoS - General	272

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Managing Power-over-Ethernet Devices

PoE on the Switch

Cisco Small Business 200 Series Smart Switch Administration Guide

151

You can decide the following:

•

Maximum power a PSE is allowed to supply to a PD

•

During device operation, to change the mode from Class Power Limit to

Port Limit and vice versa. The power values per port that were configured

for the Port Limit mode are retained.

•

Maximum port limit allowed as a per-port numerical limit in mW (Port Limit

mode).

•

To generate a trap when a PD tries to consume too much and at what

percent of the maximum power this trap is generated.

The PoE-specific hardware automatically detects the PD class and its power limit

according to the class of the device connected to each specific port (Class Limit

mode).

If at any time during the connectivity an attached PD requires more power from the

switch than the configured allocation allows (no matter if the switch is in Class

Limit or Port Limit mode), the switch does the following:

•

Maintains the up/down status of the PoE port link

•

Turns off power delivery to the PoE port

•

Logs the reason for turning off power

•

Generates a trap to a remote log server

CAUTION

Consider the following when connecting switches capable of supplying PoE:

The PoE models of the Sx200, Sx300, and Sx500 series switches are PSE (Power

Sourcing Equipment) that are capable of supplying DC power to attaching PD

(Powered Devices). These devices include VoIP phones, IP cameras, and wireless

access points. The PoE switches can detect and supply power to pre-standard

legacy PoE Powered Devices. Due to the support of legacy PoE, it is possible that

a PoE switch acting as a PSE may mistakenly detect and supply power to an

attaching PSE, including other PoE switches, as a legacy PD.

Even though Sx200/300/500 PoE switches are PSE, and as such should be

false detection. When this happens, the PoE switch may not operate properly and

may not be able to properly supply power to its attaching PDs.

To prevent false detection, you should disable PoE on the ports on the PoE switches

that are used to connect to PSEs.

You should also first power up a PSE device