Linksys SRW208L Router Manual PDF (Setup & Configuration Guide)

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Chapter 5

Advanced Configuration

8-Port 10/100 Ethernet Switch with Webview

PVID

Assigns a VLAN ID to untagged packets. The

possible values are 2 to 4094. VLAN 4095 is defined as

per standard and industry practice as the discard VLAN.

Packets classified to the Discard VLAN are dropped.

Ingress Filtering

Enables or disables Ingress filtering on

the port. Ingress filtering discards packets which do not

include an ingress port.

LAG

Indicates the LAG to which the VLAN is defined.

VLAN Management > Ports to VLAN

The

Ports to VLAN

screen contains fields for configuring

ports to a VLAN. The port default VLAN ID (PVID) is

configured on the

Create VLAN

screen. All untagged

packets arriving to the device are tagged by the ports

PVID.

VLAN Management > Ports to VLAN

The

Ports to VLAN

screen contains a Port Table for VLAN

parameters for each ports. Ports are assigned VLAN

membership by selecting and configuring the presented

configuration options.

VLAN

The VLAN number.

Access

Indicates the port belongs to a single untagged

VLAN. When a port is in Access mode, the packet types

which are accepted on the port cannot be designated.

Ingress filtering cannot be enabled/disabled on an access

port.

Trunk

Indicates the port belongs to VLANs in which

all ports are tagged, except for one port that can be

untagged.

General

Indicates the port belongs to VLANs, and each

VLAN is user-defined as tagged or untagged (full 802.1Q

mode).

Tagged

Defines the interface as a tagged member of a

VLAN. All packets forwarded by the interface are tagged.

The packets contain VLAN information.

Untagged

Packets

forwarded

the

interface

are

untagged.

Forbidden

Forbidden ports are not included in the

VLAN.

Exclude

Excludes the interface from the VLAN. However,

the interface can be added to the VLAN through GVRP.

VLAN Management > VLAN to Ports

The

VLAN to Ports

screen contains fields for configuring

VLANs to a ports.

Interface

Displays the interface number.

Mode

Indicates the port to VLAN mode. The possible

field values are:

General

Indicates the port belongs to VLANs, and each

VLAN is user-defined as tagged or untagged (full 802.1Q

mode).

Access

Indicates the port belongs to a single untagged

VLAN. When a port is in Access mode, the packet types

which are accepted on the port cannot be designated.

Ingress filtering cannot be enabled/disabled on an access

port.

Trunk

Indicates the port belongs to VLANs in which

all ports are tagged, except for one port that can be

untagged.

Join VLAN

Defines the VLANs to which the interface is

joined.

VLANs

Displays the PVID tag.

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Chapter 5

Advanced Configuration

8-Port 10/100 Ethernet Switch with Webview

LAG

Indicates if the port is a member of a LAG. If it is a

member of a LAG, it cannot be configured to a VLAN. The

LAG to which it belongs can be configured to a VLAN.

Join VLAN Detail

The

Join VLAN Detail

screen allows you to select the VLAN

for the port selected and determine whether it is tagged

or untagged. It will be displayed with a T if it is tagged and

with a U if it is untagged.

Join VLAN Detail

VLAN Management > GVRP

GARP VLAN Registration Protocol (GVRP) is specifically

provided for automatic distribution of VLAN membership

information among VLAN-aware bridges. GVRP allows

VLAN-aware bridges to automatically learn VLANs to

bridge ports mapping, without having to individually

configure each bridge and register VLAN membership.

VLAN Management > GVRP

The Global System LAG information displays the same

field information as the ports, but represent the LAG GVRP

information.

The GVRP screen is divided into two areas, GVRP and GVRP

Table. The field definitions for both areas are the same.

Enable GVRP

Enables and disables GVRP on the device.

Interface

DIsplays the interface on which GVRP is

enabled. The possible field values are:

Port

•

Indicates the port number on which GVRP is

enabled.

LAG

•

Indicates the LAG number on which GVRP is

enabled.

GVRP State

When the checkbox is checked, GVRP is

enabled on the interface.

Dynamic VLAN Creation

When the checkbox is checked,

Dynamic VLAN creation is enabled on the interface.

GVRP Registration

When the checkbox is checked, VLAN

registration through GVRP is enabled on the device.

The

Update

button adds the configured GVRP setting to

the table at the bottom of the screen.

Statistics > RMON Statistics

The

RMON Statistics

screen contains fields for viewing

information about device utilization and errors that

occurred on the device.

Statistics > RMON Statistics

Interface

Indicates the device for which statistics are

displayed. The possible field values are:

Port

•

Defines the specific port for which RMON

statistics are displayed.

LAG

•

Defines the specific LAG for which RMON

statistics are displayed.

Refresh Rate

Defines the amount of time that passes

before the interface statistics are refreshed. The possible

field values are:

No Refresh

•

Indicates that the RMON statistics are not

refreshed.

Sec

•

Indicates

that

the

RMON

statistics

are

refreshed

every

seconds.

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Chapter 5

Advanced Configuration

8-Port 10/100 Ethernet Switch with Webview

30 Sec

•

Indicates that the RMON statistics are refreshed

every 30 seconds.

60 Sec

•

Indicates that the RMON statistics are refreshed

every 60 seconds.

Drop Events

Displays the number of dropped events

that have occurred on the interface since the device was

last refreshed.

Received Bytes (Octets)

Displays the number of octets

received on the interface since the device was last

refreshed. This number includes bad packets and FCS

octets, but excludes framing bits.

Received Packets

Displays the number of packets

received

the

interface,

including

bad

packets,

Multicast and broadcast packets, since the device was last

refreshed.

Broadcast Packets Received

Displays the number of

good broadcast packets received on the interface since

the device was last refreshed. This number does not

include Multicast packets.

Multicast Packets Received

Displays the number of

good Multicast packets received on the interface since the

device was last refreshed.

CRC & Align Errors

Displays the number of CRC and

Align errors that have occurred on the interface since the

device was last refreshed.

Undersize Packets

Displays the number of undersized

packets (less than 64 octets) received on the interface

since the device was last refreshed.

Oversize Packets

Displays the number of oversized

packets (over 1518 octets) received on the interface since

the device was last refreshed.

Fragments

Displays the number of fragments (packets

with less than 64 octets, excluding framing bits, but

including FCS octets) received on the interface since the

device was last refreshed.

Jabbers

Displays the total number of received packets

that were longer than 1518 octets. This number excludes

frame bits, but includes FCS octets that had either a bad

Frame Check Sequence (FCS) with an integral number of

octets (FCS Error) or a bad FCS with a non-integral octet

(Alignment Error) number. The field range to detect

jabbers is between 20 ms and 150 ms.

Collisions

Displays the number of collisions received on

the interface since the device was last refreshed.

Frames of xx Bytes

Number of xx-byte frames received

on the interface since the device was last refreshed.

Clear Counters button

This option will reset all of the

statistic counts.

Refresh Now button

Use this option to refresh the

statistics.

Statistics > RMON History

The

RMON History

screen contains information about

samples of data taken from ports. For example, the samples

may include interface definitions or polling periods.

Statistics > RMON History

The

RMON History

screen is divided into RMON History

and Log Table.

Source Interface

Displays the interface from which the

history samples were taken. The possible field values are:

Port

•

Specifies the port from which the RMON

information was taken.

LAG

•

Specifies

the

port

from

which

the

RMON

information was taken.

Sampling

Interval

Indicates

(in

seconds)

the

time

that samplings are taken from the ports. The field range

is 1-3600. The default is

1800

seconds (equal to 30

minutes).

Max No. of Samples to Keep

Indicates the number of

samples to save.

Owner

Displays the RMON station or user that requested

the RMON information. The field range is 0-20 characters.

The

Add to List

button adds the configured RMON

sampling to the Log Table at the bottom of the screen.

Log Table

Sampling Requested

Displays the number of samples to

be saved. The field range is 1-65535. The default value is

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Chapter 5

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8-Port 10/100 Ethernet Switch with Webview

Current

Number

Samples

Displays

the

current

number of samples taken.

RMON History

Statistics > History Table

The

RMON History

screen contains interface specific

statistical network samplings. Each table entry represents

all counter values compiled during a single sample.

History Entry No

Displays the history table entry

number.

Owner

Displays the RMON station or user that requested

the RMON information. The field range is 0-20 characters.

Sample No

Indicates the sample number from which the

statistics were taken.

Drop Events

Displays the number of dropped events

that have occurred on the interface since the device was

last refreshed.

Received Bytes (Octets)

Displays the number of octets

received on the interface since the device was last

refreshed. This number includes bad packets and FCS

octets, but excludes framing bits.

Received Packets

Displays the number of packets

received on the interface since the device was last

refreshed, including bad packets, Multicast and Broadcast

packets.

Broadcast

Packets

Displays

the

number

good

Broadcast packets received on the interface since the

device was last refreshed. This number does not include

Multicast packets.

Multicast Packets

Displays the number of good Multicast

packets received on the interface since the device was last

refreshed.

CRC Align Errors

Displays the number of CRC and Align

errors that have occurred on the interface since the device

was last refreshed.

Undersize Packets

Displays the number of undersized

packets (less than 64 octets) received on the interface

since the device was last refreshed.

Oversize Packets

Displays the number of oversized

packets (over 1518 octets) received on the interface since

the device was last refreshed.

Fragments

Displays the number of fragments (packets

with less than 64 octets, excluding framing bits, but

including FCS octets) received on the interface since the

device was last refreshed.

Jabbers

Displays the total number of received packets

that were longer than 1518 octets. This number excludes

frame bits, but includes FCS octets that had either a bad

Frame Check Sequence (FCS) with an integral number of

octets (FCS Error) or a bad FCS with a non-integral octet

(Alignment Error) number. The field range to detect

jabbers is between 20 ms and 150 ms.

Collisions

Displays the number of collisions received on

the interface since the device was last refreshed.

Utilization

Displays the percentage of the interface

utilized.

Statistics > RMON Alarms

The

RMON Alarm

screen contains fields for setting network

alarms. Network alarms occur when a network problem, or

event, is detected. Rising and falling thresholds generate

events.

Statistics > RMON Alarms

Alarm Entry

Indicates a specific alarm.

Source Interface

Displays the interface for which RMON

statistics are displayed. The possible field values are:

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Chapter 5

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8-Port 10/100 Ethernet Switch with Webview

Port

•

Displays the RMON statistics for the selected

port.

LAG

•

Displays the RMON statistics for the selected

LAG.

Counter Name

Displays the selected MIB variable.

Sample Type

Defines the sampling method for the

selected variable and comparing the value against the

thresholds. The possible field values are:

Absolute

•

Compares the values directly with the

thresholds at the end of the sampling interval.

Delta

•

Subtracts the last sampled value from the

current value. The difference in the values is compared

to the threshold.

Rising Threshold

Displays the rising counter value that

triggers the rising threshold alarm. The rising threshold

is presented on top of the graph bars. Each monitored

variable is designated a color.

Rising Event

Displays the mechanism in which the alarms

are reported. The possible field values are:

LOG

•

Indicates there is not a saving mechanism for

either the device or in the management system. If the

device is not reset, the entry remains in the Log Table.

TRAP

•

Indicates that an SNMP trap is generated, and

sent via the Trap mechanism. The Trap can also be

saved using the Trap mechanism.

Both

•

Indicates that both the Log and Trap mechanism

are used to report alarms.

Falling Threshold

Displays the falling counter value that

triggers the falling threshold alarm. The falling threshold

is graphically presented on top of the graph bars. Each

monitored variable is designated a color.

Falling Event

Displays the mechanism in which the

alarms are reported. The possible field values are:

LOG

•

Indicates there is not a saving mechanism for

either the device or in the management system. If the

device is not reset, the entry remains in the Log Table.

TRAP

•

Indicates that a SNMP trap is generated, and

sent via the Trap mechanism. The Trap can also be

saved using the Trap mechanism.

Both

•

Indicates that both the Log and Trap mechanism

are used to report alarms.

Startup Alarm

Displays the trigger that activates the

alarm generation. Rising is defined by crossing the

threshold from a low-value threshold to a higher-value

threshold.

Interval

Defines the alarm interval time in seconds.

Owner

Displays the device or user that defined the

alarm.

The

Add to List

button adds the RMON Alarms Table

entry.

The Alarm Table area contains the following additional

field:

Counter Value

Displays the current counter value for the

particular alarm.

Statistics > RMON Events

An RMON Event determines the action to take when an

alarm is triggered. The response to an alarm can include

logging the alarm or sending an SNMP trap message. If

the response corresponding to an alarm has not yet been

defined, use the

RMON Event

screen to configure the Event

Setting table.

Statistics > RMON Events

Add Event

Event Entry

Displays the event.

Community

Displays the community to which the event

belongs.

Description

Displays the user-defined event description.

Type

Describes the event type. Possible values are:

None

•

Indicates that no event occurred.

Log

•

Indicates that the event is a log entry.

Trap

•

Indicates that the event is a trap.

Log and Trap

•

Indicates that the event is both a log

entry and a trap.

Owner

Displays the device or user that defined the

event.

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