Linksys LGS308 User manual

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User Guide
SMART SWITCH
LGS3XX

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Contents
Chapter 1 – Getting Started............................................................................... 5
Chapter2 – System Status ................................................................................. 9
System Summary ....................................................................................................................................9
RMON........................................................................................................................................................ 10
Interface Statistics.............................................................................................................................. 17
Chapter3 – Quick Start ..................................................................................... 19
Chapter 4 – System Management ................................................................. 20
System Information ............................................................................................................................. 20
Management Session Timeout ........................................................................................................ 21
Time ........................................................................................................................................................... 21
SNMP ........................................................................................................................................................ 27
Logs........................................................................................................................................................... 44
Chapter5 – Port Management ........................................................................ 50
Ports.......................................................................................................................................................... 50
Link Aggregation................................................................................................................................... 52
Green Ethernet...................................................................................................................................... 56
PoE............................................................................................................................................................. 59
Discovery - LLDP .................................................................................................................................. 65
Chapter 6 – VLAN Management..................................................................... 77
VLANs....................................................................................................................................................... 77
Interfaces................................................................................................................................................ 81
VLAN Memberships............................................................................................................................. 84
VLAN Groups.......................................................................................................................................... 85
Voice VLAN............................................................................................................................................. 88
Chapter 7 - Spanning Tree Management.................................................... 93
Spanning Tree........................................................................................................................................ 94
STP Interfaces....................................................................................................................................... 96
RSTP Interfaces.................................................................................................................................... 97

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MSTP Properties................................................................................................................................... 99
MSTP Instance Status..................................................................................................................... 102
MSTP Instance Interface................................................................................................................ 103
Chapter 8 - MAC Address Management .................................................. 106
Dynamic MAC Addresses............................................................................................................... 106
Static MAC Addresses .................................................................................................................... 107
Reserved MAC Addresses ............................................................................................................. 108
Chapter 9 – Multicast...................................................................................... 110
Feature Configuration ..................................................................................................................... 112
IGMP Snooping................................................................................................................................... 114
MLD Snooping .................................................................................................................................... 115
Multicast Router Ports .................................................................................................................... 116
Forward All........................................................................................................................................... 117
Unregistered Multicast ................................................................................................................... 118
IGMP/MLD IP Group Addresses ................................................................................................... 120
MAC Group Address FDB............................................................................................................... 121
IP Group Address FDB ..................................................................................................................... 123
Chapter 10 - IP Interface............................................................................... 125
IPv4......................................................................................................................................................... 125
IPv6......................................................................................................................................................... 128
Chapter11 -IP Network Operations.......................................................... 135
Domain Name System...................................................................................................................... 135
DHCP...................................................................................................................................................... 136
DHCP Snooping Binding Database ............................................................................................. 141
Interface Settings ............................................................................................................................. 143
Chapter 12 – Security..................................................................................... 144
Management Security ..................................................................................................................... 144
RADIUS ................................................................................................................................................. 152
Network Access Control................................................................................................................. 155
Port Security....................................................................................................................................... 165
Storm Control ..................................................................................................................................... 167

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Chapter 13 - Access Control List ............................................................... 169
MAC-Based ACL ................................................................................................................................ 170
MAC-Based ACE................................................................................................................................ 171
IPv4-Based ACL................................................................................................................................. 173
IPv4-Based ACE................................................................................................................................. 174
IPv6-Based ACL................................................................................................................................. 176
IPv6-Based ACE................................................................................................................................. 176
ACL Binding ......................................................................................................................................... 178
Chapter 14 - Quality of Service................................................................... 180
Feature Configuration ..................................................................................................................... 182
Queue Scheduling ............................................................................................................................. 183
CoS/802.1p to Queue ..................................................................................................................... 184
DSCP to Queue................................................................................................................................... 186
Bandwidth Control ............................................................................................................................ 187
Egress Shaping .................................................................................................................................. 188
Basic QoS............................................................................................................................................. 189
QoS Statistics .................................................................................................................................... 191
Chapter 15 - Maintenance ............................................................................ 193
Reboot ................................................................................................................................................... 193
File Management ............................................................................................................................... 193
Diagnostics.......................................................................................................................................... 201
Chapter - 16 Support...................................................................................... 208

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Chapter 1 – Getting Started
There are two ways to configure the device: through the graphical user interface and through the
menu command line interface.
Starting the Web-based Configuration Utility
This section describes how to navigate the Web-based switch configuration utility. If you are
using a pop-up blocker, make sure it is disabled. The following browsers are supported:
•Firefox (versions 16 and latest)
•IE version (versions 10 and latest)
•Chrome (versions 35 and latest)
Browser Restrictions
If you are using IPv6 interfaces on your management station, use the IPv6 global address and not
the IPv6 link local address to access the device from your browser.
Launching the Configuration Utility
To open the Web-based configuration utility, do the following:
1. Open a Web browser.
2. Enter the IP address of the device you are configuring in the address bar on the browser,
and then press Enter.
NOTE—When the device is using the factory default IP address of 192.168.1.251, its
power LED flashes continuously. When the device is using a DHCP assigned IP address or
an administrator-configured static IP address, the power LED is on solid.
3. On the login page, enter the username/password.
The password can contain up to 64
ASCII characters.The default username is “admin” and the default password is “admin”.

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Logging Out
By default, the application logs out after ten minutes of inactivity.
CAUTION
Unless the Running Configuration is copied to the Startup Configuration, rebooting the
device will remove all changes made since the last time the file was saved. Save the
Running Configuration to the Startup Configuration before logging off to preserve any
changes you made during this session.
When you click Quick Start > Save Your Configurations, the Configuration File Copy page
appears. Save the Running Configuration file by copying it to the Startup Configuration
file.
To log out, click Logout in the top right corner of any page. The system logs out of the device.
NOTE—When a timeout occurs or you intentionally log out of the system, a message appears,
and the login page appears with a message indicating the logged-out state.
Interface Naming Conventions
Within the GUI, interfaces are denoted by linking the following elements:
•Type of interface: The following types of interfaces are found on the switch:
oGigabit Ethernet ports (displayed as GE).
oLAG (Port Channel) (displayed as LAG).
oVLAN
•Interface Number: Port, LAG or VLAN ID
Window Navigation
This section describes the features of the Web-based switch configuration utility.
Application Header
The Application Header appears on every page. It provides the following application links:
Application Link Name Description
Logout Click to log out of the Web-based switch configuration utility.
Firmware Version Display the device version number.
Help Click for the link to this administration guide.

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Management Buttons
The following table describes the commonly used buttons that appear on various pages in the
system.
Button Name Description
Add Click to display the related Add page and add an entry to a table.
Enter the information and click Apply to save it to the Running
Configuration. Click Close to return to the main page. Click
Save to display the Configuration File Copy page and save the
Running Configuration to the Startup Configuration file type
on the device.
Apply Click to apply changes to the Running Configuration on the
device. If the device is rebooted, the Running Configuration is
lost unless it is saved to the Startup Configuration file type or
another file type. Click Save to display the Configuration File
Copy page and save the Running Configuration to the Startup
Configuration file type on the device.
Close Click to return to the previous page. Any changes not applied
are cleared.
Clear All Click to clear the statistic counters for all interfaces.
Clear Click to clear information, such a counters of an interface, all
interface, or log files.
Delete After selecting an entry in the table, click Delete to remove.
Edit Select the entry and click Edit.
1. Click Apply to save the changes to the Running
Configuration.
2. Click Close to return to the main page.
Search Enter the query filtering criteria and click Search.
Refresh Click Refresh to refresh the counter values.
Test or Start Click Test/Start to perform the related tests.
View or View All Click View to display details associated with the entry
selected or for all entries (respectively).

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Configuring with Menu Command Line Interface
To configure with the device through the menu CLI:
1. Log on to the device through telnet.
2. Configure the device.
3. Click Logout.

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Chapter 2 – System Status
System Summary
The System Summary page provides a graphic view of the device, and displays device status,
hardware information, firmware version information, general PoE status, and other items.
To view system information, click System Status > System Summary.
The System Summary page
contains system and hardware information.
•System Mode—Specifies whether the system is operating in Layer 2 system mode.
•System Description—A description of the system.
•System Location—Physical location of the device.
To edit this field, go to Configuration >
System Management > System Information.
•System Contact—Name of a contact person.
To edit this field, go to Configuration >
System Management > System Information.
•Host Name—Name of the device.
By default, the device host name is composed of the
word “switch” followed by the three least significant bytes of the device base MAC address
(the six furthest right hexadecimal digits).
•Base MAC Address—Device MAC address.
•
SNMP Object ID—Unique vendor identification of the network management subsystem.

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•Firmware Version—Firmware version number.
•Boot Code Version—Boot version number.
•Hardware Version —Hardware version number of the device.
•Serial Number—Serial number. Device Status
•Fan Status—Applicable only to models that have fans. The following values are possible:
oOK—Fan is operating normally.
oFail—Fan is not operating correctly.
•Date & Time—System date and time.
•System Uptime—Length of time since last reboot.
RMON
RMON Statistics
The Statistics page displays detailed information regarding packet sizes and information
regarding physical layer errors. The information displayed is according to the RMON (Remote
Network Monitoring) standard. An oversized packet is defined as an ethernet frame with the
following criteria:
•Packet length is greater than MRU byte size.
•Collision event has not been detected.
•Late collision event has not been detected.
•Received (Rx) error event has not been detected.
•Packet has a valid CRC.

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To view RMON statistics and/or set the refresh rate:
1. Click System Status > RMON > Statistics.
2. Select the Interface for which statistics are to be displayed.
3. Select the Refresh Rate, the time period that passes before the interface statistics are
refreshed.
The statistics are displayed for the selected interface.
•Bytes Received—Number of octets received, including bad packets and FCS octets, but
excluding framing bits.
•Drop Events—Number of packets dropped.
•Packets Received—Number of good packets received, including Multicast and Broadcast
packets.
•Broadcast Packets Received—Number of good Broadcast packets received. This number
does not include Multicast packets.
•Multicast Packets Received—Number of good Multicast packets received.
•CRC & Align Errors—Number of CRC and Align errors that have occurred.
•Undersize Packets—Number of undersized packets (less than 64 octets) received.
•Oversize Packets—Number of oversized packets (over 2000 octets) received.
•Fragments—Number of fragments (packets with less than 64 octets, excluding framing
bits, but including Frame Check Sequence octets) received.
•Jabbers—Total number received packets that were longer than 1632 octets. This number
excludes frame bits, but includes FCS octets that had either a bad FCS with an integral
number of octets (FCS Error) or a bad FCS with a non-integral octet (Alignment Error)
number. A jabber packet is defined as an Ethernet frame that satisfies the following
criteria:
•Packet data length is greater than MRU.
•Packet has an invalid CRC.
•Received (Rx) Error Event has not been detected.
•Collisions—Number of collisions received. If Jumbo Frames are enabled, the threshold of
Jabber Frames is raised to the maximum size of Jumbo Frames.
•Frames of 64 Bytes—Number of frames, containing 64 bytes that were received.
•Frames of 65 to 127 Bytes—Number of frames, containing 65-127 bytes that were
received.
•Frames of 128 to 255 Bytes—Number of frames, containing 128-255 bytes that were
received.
•Frames of 256 to 511 Bytes—Number of frames, containing 256-511 bytes that were
received.

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•Frames of 512 to 1023 Bytes—Number of frames, containing 512-1023 bytes that
were received.
•Packets of 1024 and More Bytes—Number of frames, containing 1024- 2000 bytes,
and Jumbo Frames, that were received.
To clear or view statistics counters:
•Click Refresh to refresh the counters on the page.
•Click Clear to clear the selected interfaces counters.
•Click View All to see all ports on a single page.
RMON History
The RMON feature enables monitoring statistics per interface.
The History Control Table page defines the sampling frequency, amount of samples to store and
the port from which to gather the data.
After the data is sampled and stored, it appears in the History Table page that can be viewed by
clicking the History button.
To enter RMON control information:
1. Click System Status > RMON > History.
2. Click Add.
3. Enter the parameters.
•New History Control Entry Index—Displays the number of the new History table
entry.
•Source Interface—Select the type of interface from which the history samples are
to be taken.
•Maximum Samples—Enter the number of samples to store.
•Samples Collected—RMON is allowed by the standard to not grant all requested
samples, but rather to limit the number of samples per request. Therefore, this
field represents the sample number actually granted to the request that is equal or
less than the requested maximum sample.
•Sampling Interval—Enter the time in seconds that samples are collected from the
ports. The field range is 1-3600.
•Owner—Enter the RMON station or user that requested the RMON information.

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4. Click Apply. The entry is added to the History Control Table page, and the Running
Configuration file is updated.
5. Click the History button (described below) to view the actual statistics.
RMON History Table
The History Table page displays interface-specific statistical network samplings. The samples
were configured in the History Control table described above.
To view RMON history statistics:
1. Click System Status > RMON > History.
2. Click History.
3. From the History Entry Index drop down menu, optionally select the entry number of the
sample to display.
The fields are displayed for the selected sample.
•Owner—History table entry owner.
•Sample No.—Statistics were taken from this sample.
•Drop Events—Dropped packets due to lack of network resources during the
sampling interval. This may not represent the exact number of dropped packets,
but rather the number of times dropped packets were detected.
•Bytes Received—Octets received including bad packets and FCS octets, but
excluding framing bits.
•Packets Received—Packets received, including bad packets, Multicast, and
Broadcast packets.
•Broadcast Packets—Good Broadcast packets excluding Multicast packets.
•Multicast Packets—Good Multicast packets received.
•CRC Align Errors—CRC and Align errors that have occurred.
•Undersize Packets—Undersized packets (less than 64 octets) received.
•Oversize Packets—Oversized packets (over 2000 octets) received.
•Fragments—Fragments (packets with less than 64 octets) received, excluding
framing bits, but including FCS octets.

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•Jabbers—Total number of received packets that were longer than 2000 octets.
This number excludes frame bits, but includes FCS octets that had either a bad
FCS (Frame Check Sequence) with an integral number of octets (FCS Error) or a
bad FCS with a non-integral octet (Alignment Error) number.
•Collisions—Collisions received.
•Utilization—Percentage of current interface traffic compared to maximum traffic
that the interface can handle.
RMON Events
You can control the occurrences that trigger an alarm and the type of notification that occurs.
•Events Page—Configures what happens when an alarm is triggered. This can be any
combination of logs and traps.
•Alarms Page—Configures the occurrences that trigger an alarm.
To define RMON events:
1. Click System Status > RMON > Events.
This page displays previously defined events.
2. Click Add.
3. Enter the parameters.
•Event Entry Index —Displays the event entry index number for the new entry.
•Community—Enter the SNMP community string to be included when traps are sent
(optional). Note that the community must be defined using the Defining SNMPv1
and v2 Notification Recipients or Defining SNMPv3 Notification Recipients pages
for the trap to reach the Network Management Station
•Description—Enter a name for the event. This name is used in the Add RMON
Alarm page to attach an alarm to an event.
•Notification Type—Select the type of action that results from this event.
oNone—No action occurs when the alarm goes off.
oLog (Event Log Table)—Add a log entry to the Event Log table when the
alarm is triggered.

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oTrap (SNMP Manager and SYSLOG Server)—Send a trap to the remote log
server when the alarm goes off.
oLog and Trap—Add a log entry to the Event Log table and send a trap to the
remote log server when the alarm goes off.
•Last Event Time—Displays the time of the event. (This is a read-only table in the
parent window and cannot be defined).
•Owner—Enter the device or user that defined the event.
4. Click Apply. The RMON event is saved to the Running Configuration file.
5. Click Event Log to display the log of alarms that have occurred and that have been logged
(see description below).
RMON Events Logs
The Event Log Table page displays the log of events (actions) that occurred. Two types of events
can be logged: Log or Log and Trap. The action in the event is performed when the event is bound
to an alarm (see RMON Alarms) and the conditions of the alarm have occurred.
•Click System Status > RMON > Events.
•Click Event Log.
oEvent Index—Event’s log entry number.
oLog Index.—Log number (within the event).
oLog Time—Time that the log entry was entered.
oDescription—Description of event that triggered the alarm.

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RMON Alarms
RMON alarms provide a mechanism for setting thresholds and sampling intervals to generate
exception events on counters or any other SNMP object counter maintained by the agent. Both
the rising and falling thresholds must be configured in the alarm. After a rising threshold is
crossed, no rising events are generated until the companion falling threshold is crossed. After a
falling alarm is issued, the next alarm is issued when a rising threshold is crossed.
One or more alarms are bound to an event, which indicates the action to be taken when the alarm
occurs.
Alarm counters can be monitored by either absolute values or changes (delta) in the counter
values.
To enter RMON alarms:
1. Click System Status > RMON > Alarms. All previously-defined alarms are displayed. The
fields are described in the Add RMON Alarm page below.
•Counter Value—Displays the value of the statistic during the last sampling period.
2. Click Add.
3. Enter the parameters.
•Alarm Entry Index—Displays the alarm entry number.
•Interface—Select the type of interface for which RMON statistics are displayed.
•Counter Name—Select the MIB variable that indicates the type of occurrence
measured.
•Sample Type—Select the sampling method to generate an alarm. The options are:
oAbsolute—If the threshold is crossed, an alarm is generated.
oDelta—Subtracts the last sampled value from the current value. The
difference in the values is compared to the threshold. If the threshold was
crossed, an alarm is generated.
oInterval—Enter the alarm interval time in seconds.
•Rising Event—Select an event to be performed when a rising event is triggered.
Events are created in the Events page.
•Rising Threshold—Enter the value that triggers the rising threshold alarm
•Falling Event—Select an event to be performed when a falling event is triggered.

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•Falling Threshold—Enter the value that triggers the falling threshold alarm.
•Startup Alarm—Select the first event from which to start generation of alarms.
Rising is defined by crossing the threshold from a low-value threshold to a higher-
value threshold.
oRising Alarm—A rising value triggers the rising threshold alarm.
oFalling Alarm—A falling value triggers the falling threshold alarm.
oRising and Falling—Both rising and falling values trigger the alarm.
•Owner—Enter the name of the user or network management system that receives
the alarm.
4. Click Apply. The RMON alarm is saved to the Running Configuration file.
Interface Statistics
The Interface Statistics page displays traffic statistics per port. The refresh rate of the
information can be selected.
This page is useful for analyzing the amount of traffic that is both sent and received and its
dispersion (Unicast, Multicast, and Broadcast).

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To display Ethernet statistics and/or set the refresh rate:
1. Click System Status > Interface Statistics.
2. Enter the parameters.
oInterface—Select the specific interface for which Ethernet statistics are to be
displayed.
oRefresh Rate—Select the time period that passes before the interface Ethernet
statistics are refreshed. The available options are as follows:
- No Refresh—Statistics are not refreshed.
- 15 Sec—Statistics are refreshed every 15 seconds.
- 30 Sec—Statistics are refreshed every 30 seconds.
- 60 Sec—Statistics are refreshed every 60 seconds.
oTotal Octets—Octets received, including bad packets and FCS octets, but excluding
framing bits.
oUnicast Packets—Good Unicast packets received.
oMulticast Packets—Good Multicast packets received.
oBroadcast Packets—Good Broadcast packets received.
oError Packets—Packets with errors received.
oTotal Octets—Octets transmitted, including bad packets and FCS octets, but
excluding framing bits.
oUnicast Packets—Good Unicast packets transmitted.
oMulticast Packets—Good Multicast packets transmitted.
oBroadcast Packets—Good Broadcast packets transmitted.
To clear or view statistics counters:
•Click Refresh to refresh the counters on the page.
•Click Clear to clear the selected interfaces counters.
•Click View All to see all ports on a single page.

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Chapter 3 – Quick Start
To simplify device configuration through quick navigation, the Quick Start page provides links to
the most commonly used pages.
Link Name (on the Page) Linked Page
Configure User Accounts and
Management Access
User Access & Accounts
Configure Device IP Address IPv4 Interface
Create VLANs VLANs
Configure VLAN Memberships VLAN Memberships
Save Your Configuration Configuration File Copy
Clicking on the Support link takes you to the device product support page.

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Chapter 4 – System Management
System Information
To enter system information:
1. Click Configuration > System Management > System Information.
2. View or modify the system settings.
•System Description—Displays a description of the device.
•System Location—Enter the location where the device is physically located.
•System Contact—Enter the name of a contact person.
•System Host Name—Select the host name of this device.
oDefault—The default host name (System Name) of these switches is
switch123456, where 123456 represents the last three bytes of the
device MAC address in hex format.
oUser Defined—Enter the host name. Use only letters, digits, and hyphens.
Host names cannot begin or end with a hyphen. No other symbols,
punctuation characters, or blank spaces are permitted (as specified in
RFC1033, 1034, 1035).
3. Click Apply to save the values in the Running Configuration file.