MicroNet SP6526 User manual

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User’s Manual

Model No.: SP6526

26-port Gigabit Managed

Ethernet Switch

User’s Manual

SP6526

24-Port 10/100/1000 Gigabit Managed Ethernet Switch with 2 100/

1000BASE-X SFP Uplink Slots

August 2013

E082013-AP-R01

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ABOUT THIS GUIDE

PURPOSE This guide gives specific information on how to operate and use the

management functions of the switch.

AUDIENCE The guide is intended for use by network administrators who are

responsible for operating and maintaining network equipment;

consequently, it assumes a basic working knowledge of general switch

functions, the Internet Protocol (IP), and Simple Network Management

Protocol (SNMP).

CONVENTIONS The following conventions are used throughout this guide to show

information:

N

OTE

:

Emphasizes important information or calls your attention to related

features or instructions.

C

AUTION

:

Alerts you to a potential hazard that could cause loss of data, or

damage the system or equipment.

W

ARNING

:

Alerts you to a potential hazard that could cause personal injury.

RELATED PUBLICATIONS The following publication details the hardware features of the switch,

including the physical and performance-related characteristics, and how to

install the switch:

The Installation Guide

Also, as part of the switch’s software, there is an online web-based help

that describes all management related features.

REVISION HISTORY This section summarizes the changes in each revision of this guide.

AUGUST 2013 REVISION

This is the first version of this guide. This guide is valid for software release

v1.0.0.4.

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CONTENTS

ABOUT THIS GUIDE 3

C

ONTENTS 4

F

IGURES 10

T

ABLES 15

SECTION I GETTING STARTED 16

1INTRODUCTION 17

Key Features 17

Description of Software Features 18

System Defaults 23

2INITIAL SWITCH CONFIGURATION 25

SECTION II WEB CONFIGURATION 27

3USING THE WEB INTERFACE 28

Navigating the Web Browser Interface 28

Home Page 28

Configuration Options 29

Panel Display 29

Main Menu 29

4CONFIGURING THE SWITCH 38

Configuring System Information 38

Setting an IP Address 39

Setting an IPv4 Address 39

Setting an IPv6 Address 41

Configuring NTP Service 43

Configuring the Time Zone and Daylight Savings Time 44

Configuring Remote Log Messages 46

Configuring Power Reduction 47

C

ONTENTS

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Reducing Power to Idle Queue Circuits 47

Configuring Port Connections 49

Configuring Security 51

Configuring User Accounts 51

Configuring User Privilege Levels 53

Configuring The Authentication Method For Management Access 55

Configuring SSH 57

Configuring HTTPS 58

Filtering IP Addresses for Management Access 60

Using Simple Network Management Protocol 61

Remote Monitoring 72

Configuring Port Limit Controls 77

Configuring Authentication Through Network Access Servers 80

Filtering Traffic with Access Control Lists 90

Configuring DHCP Snooping 101

Configuring DHCP Relay and Option 82 Information 104

Configuring IP Source Guard 105

Configuring ARP Inspection 109

Specifying Authentication Servers 112

Creating Trunk Groups 114

Configuring Static Trunks 115

Configuring LACP 117

Configuring Loop Protection 119

Configuring the Spanning Tree Algorithm 121

Configuring Global Settings for STA 123

Configuring Multiple Spanning Trees 126

Configuring Spanning Tree Bridge Priorities 128

Configuring

STP/RSTP/CIST Interfaces 129

Configuring MIST Interfaces 133

Multicast VLAN Registration 134

Configuring General MVR Settings 135

Configuring MVR Channel Settings 138

IGMP Snooping 140

Configuring Global and Port-Related Settings for IGMP Snooping 140

Configuring VLAN Settings for IGMP Snooping and Query 144

Configuring IGMP Filtering 146

C

ONTENTS

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MLD Snooping 147

Configuring Global and Port-Related Settings for MLD Snooping 147

Configuring VLAN Settings for MLD Snooping and Query 150

Configuring MLD Filtering 152

Link Layer Discovery Protocol 153

Configuring LLDP Timing and TLVs 153

Configuring LLDP-MED TLVs 156

Configuring the MAC Address Table 162

IEEE 802.1Q VLANs 164

Assigning Ports to VLANs 165

Configuring VLAN Attributes for Port Members 166

Configuring Private VLANs 169

Using Port Isolation 170

Configuring MAC-based VLANs 171

Protocol VLANs 172

Configuring Protocol VLAN Groups 173

Mapping Protocol Groups to Ports 174

Configuring IP Subnet-based VLANs 175

Managing VoIP Traffic 177

Configuring VoIP Traffic 177

Configuring Telephony OUI 179

Quality of Service 180

Configuring Port Classification 181

Configuring Port Policiers 183

Configuring Egress Port Scheduler 184

Configuring Egress Port Shaper 187

Configuring Port Remarking Mode 188

Configuring Port DSCP Translation and Rewriting 190

Configuring DSCP-based QoS Ingress Classification 191

Configuring DSCP Translation 192

Configuring DSCP Classification 193

Configuring QoS Control Lists 194

Configuring Storm Control 198

Configuring Local Port Mirroring 199

Configuring Remote Port Mirroring 201

Configuring UPnP 206

C

ONTENTS

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Configuring sFlow 208

5MONITORING THE SWITCH 211

Displaying Basic Information About the System 211

Displaying System Information 211

Displaying CPU Utilization 212

Displaying Log Messages 213

Displaying Log Details 215

Displaying Information About Ports 215

Displaying Port Status On the Front Panel 215

Displaying an Overview of Port Statistics 216

Displaying QoS Statistics 216

Displaying QCL Status 217

Displaying Detailed Port Statistics 218

Displaying Information About Security Settings 221

Displaying Access Management Statistics 221

Displaying Information About Switch Settings for Port Security 222

Displaying Information About Learned MAC Addresses 224

Displaying Port Status for Authentication Services 225

Displaying Port Statistics for 802.1X or Remote Authentication Service

226

Displaying ACL Status 230

Displaying Statistics for DHCP Snooping 232

Displaying DHCP Relay Statistics 233

Displaying MAC Address Bindings for ARP Packets 235

Displaying Entries in the IP Source Guard Table 235

Displaying Information on Authentication Servers 236

Displaying a List of Authentication Servers 236

Displaying Statistics for Configured Authentication Servers 237

Displaying Information on RMON 241

Displaying RMON Statistics 241

Displaying RMON Historical Samples 242

Displaying RMON Alarm Settings 243

Displaying RMON Event Settings 244

Displaying Information on LACP 245

Displaying an Overview of LACP Groups 245

Displaying LACP Port Status 245

Displaying LACP Port Statistics 246

C

ONTENTS

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Displaying Information on Loop Protection 247

Displaying Information on the Spanning Tree 248

Displaying Bridge Status for STA 248

Displaying Port Status for STA 251

Displaying Port Statistics for STA 252

Displaying MVR Information 253

Displaying MVR Statistics 253

Displaying MVR Group Information 254

Displaying MVR SFM Information 255

Showing IGMP Snooping Information 256

Showing IGMP Snooping Status 256

Showing IGMP Snooping Group Information 257

Showing IPv4 SFM Information 258

Showing MLD Snooping Information 259

Showing MLD Snooping Status 259

Showing MLD Snooping Group Information 260

Showing IPv6 SFM Information 261

Displaying LLDP Information 262

Displaying LLDP Neighbor Information 262

Displaying LLDP-MED Neighbor Information 263

Displaying LLDP Neighbor EEE Information 266

Displaying LLDP Port Statistics 267

Displaying the MAC Address Table 269

Displaying Information About VLANs 270

VLAN Membership 270

VLAN Port Status 271

Displaying Information About MAC-based VLANs 272

Displaying Information About Flow Sampling 273

6PERFORMING BASIC DIAGNOSTICS 276

Pinging an IPv4 or IPv6 Address 276

7PERFORMING SYSTEM MAINTENANCE 278

Restarting the Switch 278

Restoring Factory Defaults 279

Upgrading Firmware 279

Activating the Alternate Image 280

Managing Configuration Files 281

C

ONTENTS

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Saving Configuration Settings 281

Restoring Configuration Settings 281

SECTION III APPENDICES 283

ASOFTWARE SPECIFICATIONS 284

Software Features 284

Management Features 285

Standards 286

Management Information Bases 287

BTROUBLESHOOTING 288

Problems Accessing the Management Interface 288

Using System Logs 289

CLICENSE INFORMATION 290

The GNU General Public License 290

GLOSSARY 294

I

NDEX 301

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FIGURES

Figure 1: Home Page 28

Figure 2: Front Panel Indicators 29

Figure 3: System Information Configuration 38

Figure 4: IP Configuration 40

Figure 5: IPv6 Configuration 42

Figure 6: NTP Configuration 43

Figure 7: Time Zone and Daylight Savings Time Configuration 46

Figure 8: Configuring Settings for Remote Logging of Error Messages 47

Figure 9: Configuring EEE Power Reduction 49

Figure 10: Port Configuration 51

Figure 11: Showing User Accounts 53

Figure 12: Configuring User Accounts 53

Figure 13: Configuring Privilege Levels 55

Figure 14: Authentication Server Operation 56

Figure 15: Authentication Method for Management Access 57

Figure 16: SSH Configuration 58

Figure 17: HTTPS Configuration 60

Figure 18: Access Management Configuration 61

Figure 19: SNMP System Configuration 66

Figure 20: SNMPv3 Community Configuration 67

Figure 21: SNMPv3 User Configuration 69

Figure 22: SNMPv3 Group Configuration 70

Figure 23: SNMPv3 View Configuration 71

Figure 24: SNMPv3 Access Configuration 72

Figure 25: RMON Statistics Configuration 73

Figure 26: RMON History Configuration 74

Figure 27: RMON Alarm Configuration 76

Figure 28: RMON Event Configuration 77

Figure 29: Port Limit Control Configuration 79

Figure 30: Using Port Security 80

Figure 31: Network Access Server Configuration 90

F

IGURES

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Figure 32: ACL Port Configuration 92

Figure 33: ACL Rate Limiter Configuration 93

Figure 34: Access Control List Configuration 101

Figure 35: DHCP Snooping Configuration 103

Figure 36: DHCP Relay Configuration 105

Figure 37: Configuring Global and Port-based Settings for IP Source Guard 107

Figure 38: Configuring Static Bindings for IP Source Guard 108

Figure 39: Configuring Global and Port Settings for ARP Inspection 110

Figure 40: Configuring Static Bindings for ARP Inspection 111

Figure 41: Authentication Configuration 113

Figure 42: Static Trunk Configuration 117

Figure 43: LACP Port Configuration 119

Figure 44: Loop Protection Configuration 120

Figure 45: STP Root Ports and Designated Ports 121

Figure 46: MSTP Region, Internal Spanning Tree, Multiple Spanning Tree 122

Figure 47: Common Internal Spanning Tree, Common Spanning Tree, Internal

Spanning Tree122

Figure 48: STA Bridge Configuration 126

Figure 49: Adding a VLAN to an MST Instance 128

Figure 50: Configuring STA Bridge Priorities 129

Figure 51: STP/RSTP/CIST Port Configuration 133

Figure 52: MSTI Port Configuration 134

Figure 53: MVR Concept 135

Figure 54: Configuring General MVR Settings 138

Figure 55: Configuring MVR Channel Settings 139

Figure 56: Configuring Global and Port-related Settings for IGMP Snooping 143

Figure 57: Configuring VLAN Settings for IGMP Snooping and Query 146

Figure 58: IGMP Snooping Port Group Filtering Configuration 146

Figure 59: Configuring Global and Port-related Settings for MLD Snooping 150

Figure 60: Configuring VLAN Settings for MLD Snooping and Query 152

Figure 61: MLD Snooping Port Group Filtering Configuration 153

Figure 62: LLDP Configuration 156

Figure 63: LLDP-MED Configuration 162

Figure 64: MAC Address Table Configuration 164

Figure 65: VLAN Membership Configuration 166

Figure 66: VLAN Port Configuration 168

Figure 67: Private VLAN Membership Configuration 170

F

IGURES

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Figure 68: Port Isolation Configuration 170

Figure 69: Configuring MAC-Based VLANs 172

Figure 70: Configuring Protocol VLANs 174

Figure 71: Assigning Ports to Protocol VLANs 175

Figure 72: Assigning Ports to an IP Subnet-based VLAN 176

Figure 73: Configuring Global and Port Settings for a Voice VLAN 179

Figure 74: Configuring an OUI Telephony List 180

Figure 75: Configuring Ingress Port QoS Classification 182

Figure 76: Configuring Ingress Port Tag Classification 183

Figure 77: Configuring Ingress Port Policing 184

Figure 78: Displaying Egress Port Schedulers 186

Figure 79: Configuring Egress Port Schedulers and Shapers 187

Figure 80: Displaying Egress Port Shapers 188

Figure 81: Displaying Port Tag Remarking Mode 189

Figure 82: Configuring Port Tag Remarking Mode 190

Figure 83: Configuring Port DSCP Translation and Rewriting 191

Figure 84: Configuring DSCP-based QoS Ingress Classification 192

Figure 85: Configuring DSCP Translation and Re-mapping 193

Figure 86: Mapping DSCP to CoS/DPL Values 194

Figure 87: QoS Control List Configuration 198

Figure 88: Storm Control Configuration 199

Figure 89: Mirror Configuration 201

Figure 90: Configuring Remote Port Mirroring 201

Figure 91: Mirror Configuration (Source) 204

Figure 92: Mirror Configuration (Intermediate) 205

Figure 93: Mirror Configuration (Destination) 206

Figure 94: UPnP Configuration 208

Figure 95: sFlow Configuration 210

Figure 96: System Information 212

Figure 97: CPU Load 213

Figure 98: System Log Information 214

Figure 99: Detailed System Log Information 215

Figure 100: Port State Overview 215

Figure 101: Port Statistics Overview 216

Figure 102: Queueing Counters 217

Figure 103: QoS Control List Status 218

F

IGURES

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Figure 104: Detailed Port Statistics 220

Figure 105: Access Management Statistics 221

Figure 106: Port Security Switch Status 223

Figure 107: Port Security Port Status 224

Figure 108: Network Access Server Switch Status 226

Figure 109: NAS Statistics for Specified Port 230

Figure 110: ACL Status 231

Figure 111: DHCP Snooping Statistics 233

Figure 112: DHCP Relay Statistics 234

Figure 113: Dynamic ARP Inspection Table 235

Figure 114: Dynamic IP Source Guard Table 235

Figure 115: RADIUS Overview 236

Figure 116: RADIUS Details 240

Figure 117: RMON Statistics 242

Figure 118: RMON History Overview 243

Figure 119: RMON Alarm Overview 244

Figure 120: RMON Event Overview 244

Figure 121: LACP System Status 245

Figure 122: LACP Port Status 246

Figure 123: LACP Port Statistics 247

Figure 124: Loop Protection Status 248

Figure 125: Spanning Tree Bridge Status 250

Figure 126: Spanning Tree Detailed Bridge Status 251

Figure 127: Spanning Tree Port Status 252

Figure 128: Spanning Tree Port Statistics 253

Figure 129: MVR Statistics 254

Figure 130: MVR Group Information 255

Figure 131: MVR SFM Information 256

Figure 132: IGMP Snooping Status 257

Figure 133: IGMP Snooping Group Information 258

Figure 134: IPv4 SFM Information 259

Figure 135: MLD Snooping Status 260

Figure 136: MLD Snooping Group Information 261

Figure 137: IPv6 SFM Information 262

Figure 138: LLDP Neighbor Information 263

Figure 139: LLDP-MED Neighbor Information 266

F

IGURES

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Figure 140: LLDP Neighbor EEE Information 267

Figure 141: LLDP Port Statistics 269

Figure 142: MAC Address Table 270

Figure 143: Showing VLAN Members 271

Figure 144: Showing VLAN Port Status 272

Figure 145: Showing MAC-based VLAN Membership Status 273

Figure 146: Showing sFlow Statistics 275

Figure 147: ICMP Ping 277

Figure 148: Restart Device 278

Figure 149: Factory Defaults 279

Figure 150: Software Upload 280

Figure 151: Software Image Selection 280

Figure 152: Configuration Save 281

Figure 153: Configuration Upload 282

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TABLES

Table 1: Key Features 17

Table 2: System Defaults 23

Table 3: Web Page Configuration Buttons 29

Table 4: Main Menu 29

Table 5: HTTPS System Support 59

Table 6: SNMP Security Models and Levels 62

Table 7: Dynamic QoS Profiles 83

Table 8: QCE Modification Buttons 95

Table 9: Recommended STA Path Cost Range 130

Table 10: Recommended STA Path Costs 130

Table 11: Default STA Path Costs 131

Table 12: QCE Modification Buttons 195

Table 13: System Capabilities 262

Table 14: Troubleshooting Chart 288

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S

ECTION

I

GETTING STARTED

This section provides an overview of the switch, and introduces some basic

concepts about network switches. It also describes the basic settings

required to access the management interface.

This section includes these chapters:

◆ "Introduction" on page 17

◆ "Initial Switch Configuration" on page 25

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1 INTRODUCTION

Micronet SP6526 is Gigabit Smart Switch delivers wire speed Gigabit

performance and web-based management functions, suitable for high

performance workgroups and server applications. With 24-port 10/100/

1000Mbps RJ-45 ports plus 2-port 100/1000BASE-X SFP slot for fiber optic

connection, it provides 52 Gbps wire-speed switching performance across

all 26 ports which significantly improves application response times and the

speed of large file transfers enabling a perfect solution for huge data

transmission and preserves the great flexibility of network infrastructure.

Micronet SP6526 provides an easy to install, user-friendly web interface

that allows quick and simple configuration, and still delivers essential

features such as enhanced security to protect your network, and

continuous availability to minimize network downtime. The switch also

supports IGMP snooping, which is especially useful for bandwidth-intensive

IP multicast applications such as IPTV. This switch enables networks of all

sizes to introduce Gigabit Ethernet with management features including

VLANs, Spanning Tree, link aggregation, multicasting, storm control, SNMP

for both IPv4 and IPv6 targeted to meet the needs of the SMB network,

and Gigabit to the desktop for power users. It is packed with features and

is a cost effective solution that brings continuous availability, QoS priority

queuing with classification and prioritization at Layer 2.

KEY FEATURES

Table 1: Key Features

Feature Description

Configuration Backup

and Restore

Backup to management station using Web

Authentication Telnet, Web – user name/password, RADIUS, TACACS+

Web – HTTPS

Tel ne t – SSH

SNMP v1/2c - Community strings

SNMP version 3 – MD5 or SHA password

Port – IEEE 802.1X, MAC address filtering

General Security

Measures

Private VLANs

Port Authentication

Port Security

DHCP Snooping (with Option 82 relay information)

IP Source Guard

Access Control Lists Supports up to 256 rules

DHCP Client

DNS Client and Proxy service

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Description of Software Features

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DESCRIPTION OF SOFTWARE FEATURES

The switch provides a wide range of advanced performance enhancing

features. Flow control eliminates the loss of packets due to bottlenecks

caused by port saturation. Storm suppression prevents broadcast,

multicast, and unknown unicast traffic storms from engulfing the network.

Untagged (port-based), tagged, and protocol-based VLANs provide traffic

security and efficient use of network bandwidth. CoS priority queueing

ensures the minimum delay for moving real-time multimedia data across

the network. While multicast filtering provides support for real-time

network applications.

Some of the management features are briefly described below.

CONFIGURATION

BACKUP AND

RESTORE

You can save the current configuration settings to a file on the

management station (using the web interface) or a TFTP server (using the

console interface through Telnet), and later download this file to restore

the switch configuration settings.

Port Configuration Speed, duplex mode, flow control, MTU, response to excessive

collisions, power saving mode

Rate Limiting Input rate limiting per port (manual setting or ACL)

Port Mirroring 1 sessions, up to 10 source port to one analysis port per session

Port Trunking Supports up to 5 trunks – static or dynamic trunking (LACP)

Congestion Control Throttling for broadcast, multicast, unknown unicast storms

Address Table 8K MAC addresses in the forwarding table, 1000 static MAC

addresses, 1K L2 IGMP multicast groups and 128 MVR groups

IP Version 4 and 6 Supports IPv4 and IPv6 addressing, management, and QoS

IEEE 802.1D Bridge Supports dynamic data switching and addresses learning

Store-and-Forward

Switching

Supported to ensure wire-speed switching while eliminating bad

frames

Spanning Tree Algorithm Supports standard STP, Rapid Spanning Tree Protocol (RSTP), and

Multiple Spanning Trees (MSTP)

Virtual LANs Up to 4K using IEEE 802.1Q, port-based, protocol-based, private

VLANs, and voice VLANs, and QinQ tunnel

Traffic Prioritization Queue mode and CoS configured by Ethernet type, VLAN ID, TCP/

UDP port, DSCP, ToS bit, VLAN tag priority, or port

Qualify of Service Supports Differentiated Services (DiffServ), and DSCP remarking

Link Layer Discovery

Protocol

Used to discover basic information about neighboring devices

Multicast Filtering Supports IGMP snooping and query, MLD snooping, and Multicast

VLAN Registration

Table 1: Key Features (Continued)

Feature Description

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Description of Software Features

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AUTHENTICATION This switch authenticates management access via a web browser. User

names and passwords can be configured locally or can be verified via a

remote authentication server (i.e., RADIUS or TACACS+). Port-based

authentication is also supported via the IEEE 802.1X protocol. This protocol

uses Extensible Authentication Protocol over LANs (EAPOL) to request user

credentials from the 802.1X client, and then uses the EAP between the

switch and the authentication server to verify the client’s right to access

the network via an authentication server (i.e., RADIUS or TACACS+

server).

Other authentication options include HTTPS for secure management access

via the web, SSH for secure management access over a Telnet-equivalent

connection, SNMP Version 3, IP address filtering for SNMP/Telnet/web

management access, and MAC address filtering for port access.

ACCESS CONTROL

LISTS

ACLs provide packet filtering for IP frames (based on protocol, TCP/UDP

port number or frame type) or layer 2 frames (based on any destination

MAC address for unicast, broadcast or multicast, or based on VLAN ID or

VLAN tag priority). ACLs can by used to improve performance by blocking

unnecessary network traffic or to implement security controls by restricting

access to specific network resources or protocols. Policies can be used to

differentiate service for client ports, server ports, network ports or guest

ports. They can also be used to strictly control network traffic by only

allowing incoming frames that match the source MAC and source IP on

specific port.

PORT CONFIGURATION You can manually configure the speed and duplex mode, and flow control

used on specific ports, or use auto-negotiation to detect the connection

settings used by the attached device. Use the full-duplex mode on ports

whenever possible to double the throughput of switch connections. Flow

control should also be enabled to control network traffic during periods of

congestion and prevent the loss of packets when port buffer thresholds are

exceeded. The switch supports flow control based on the IEEE 802.3x

standard (now incorporated in IEEE 802.3-2002).

RATE LIMITING This feature controls the maximum rate for traffic transmitted or received

on an interface. Rate limiting is configured on interfaces at the edge of a

network to limit traffic into or out of the network. Traffic that falls within

the rate limit is transmitted, while packets that exceed the acceptable

amount of traffic are dropped.

PORT MIRRORING The switch can unobtrusively mirror traffic from any port to a monitor port.

You can then attach a protocol analyzer or RMON probe to this port to

perform traffic analysis and verify connection integrity.

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Description of Software Features

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PORT TRUNKING Ports can be combined into an aggregate connection. Trunks can be

manually set up or dynamically configured using Link Aggregation Control

Protocol (LACP – IEEE 802.3-2005). The additional ports dramatically

increase the throughput across any connection, and provide redundancy by

taking over the load if a port in the trunk should fail. The switch supports

up to 5 trunks.

STORM CONTROL Broadcast, multicast and unknown unicast storm suppression prevents

traffic from overwhelming the network.When enabled on a port, the level of

broadcast traffic passing through the port is restricted. If broadcast traffic

rises above a pre-defined threshold, it will be throttled until the level falls

back beneath the threshold.

STATIC ADDRESSES A static address can be assigned to a specific interface on this switch.

Static addresses are bound to the assigned interface and will not be

moved. When a static address is seen on another interface, the address will

be ignored and will not be written to the address table. Static addresses

can be used to provide network security by restricting access for a known

host to a specific port.

IEEE 802.1D BRIDGE The switch supports IEEE 802.1D transparent bridging. The address table

facilitates data switching by learning addresses, and then filtering or

forwarding traffic based on this information. The address table supports up

to 16K addresses.

STORE-AND-FORWARD

SWITCHING

The switch copies each frame into its memory before forwarding them to

another port. This ensures that all frames are a standard Ethernet size and

have been verified for accuracy with the cyclic redundancy check (CRC).

This prevents bad frames from entering the network and wasting

bandwidth.

To avoid dropping frames on congested ports, the switch provides 8 MB for

frame buffering. This buffer can queue packets awaiting transmission on

congested networks.

SPANNING TREE

ALGORITHM

The switch supports these spanning tree protocols:

◆ Spanning Tree Protocol (STP, IEEE 802.1D) – Supported by using the

STP backward compatible mode provided by RSTP. STP provides loop

detection. When there are multiple physical paths between segments,

this protocol will choose a single path and disable all others to ensure

that only one route exists between any two stations on the network.

This prevents the creation of network loops. However, if the chosen

path should fail for any reason, an alternate path will be activated to

maintain the connection.

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