Linksys SLM224G4S Manuel d'utilisateur télécharger pdf (Page 32)

Chapter 5

Configuration Using the Web-based Utility

24/48-Port 10/100 + 4-Port Gigabit Resilient Clustering Smart Switch with 2 Combo SFPs

Broadcast Packets 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 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 is used to set network alarms.

Network alarms occur when a network problem, or event,

is detected. Rising and falling thresholds generate events.

Statistics > RMON Alarm

Add Alarm

Alarm Entry Indicates a specific alarm.

Interface Indicates the interface for which RMON

statistics are displayed. To specify the interface, select

Unit No. (default) and specify the unit number and port

from the drop-down menus, or select LAG and select the

LAG number from the drop-down menu.

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 alarm

generation. Rising is defined by crossing the threshold

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

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Linksys SLM224G4S Manuel d'utilisateur Page 32

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