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37
Chapter 5: Using the Web-based Utility for Configuration
VLAN Management Tab - VLAN to Ports
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
Untagged.
Packets forwarded by the interface are untagged.
Tagged.
Defines the interface as a tagged member of a VLAN. All packets forwarded by the interface are tagged.
The packets contain VLAN information.
VLAN Management Tab - VLAN to Ports
The VLAN to Ports screen contains fields for configuring VLANs to a ports.
Port.
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. Select the VLAN ID, then click
Apply
.
VLANs.
Displays the PVID tag.
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.
Figure 5-15: VLAN Management - VLAN to Ports
Figure 5-16: VLAN to Ports - Join VLAN
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38
Chapter 5: Using the Web-based Utility for Configuration
Statistics Tab - RMON Statistics
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
Statistics Tab - RMON Statistics
The RMON Statistics screen contains fields for viewing information about device utilization and errors that
occurred on the device.
To view the interface statistics for a port, select the required interface from the drop-down menu and click
Query
.
To set a refresh rate or to update the interface statistics, select a time interval from the Refresh Rate drop-down
menu.
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.
•
15 Sec.
Indicates that the RMON statistics are refreshed every 15 seconds.
•
30 Sec.
Indicates that the RMON statistics are refreshed every 30 seconds.
•
60 Sec.
Indicates that the RMON statistics are refreshed every 60 seconds.
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.
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, 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.
Figure 5-17: Statistics - RMON Statistics
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39
Chapter 5: Using the Web-based Utility for Configuration
Statistics Tab - RMON History
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
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 Tab - RMON History
The RMON History screen allows you to monitor your network for common errors and overall traffic rates. The
History Control Table allows you to add, edit and delete collection entries, or to select a specific index entry and
then view the historical data in table form.
History Control 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.
Figure 5-18: Statistics - RMON History
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Chapter 5: Using the Web-based Utility for Configuration
Statistics Tab - RMON Alarm
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
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 (30 minutes).
Sampling Requested.
Indicates the number of samples to save. (Range:1-65535)
Owner.
The name of the person who created this entry in the Control Table. (Maximum 127 characters)
The
Add to List
button adds the configured RMON sampling to the Log Table at the bottom of the screen.
View History Table
button. This button opens the History Table screen. The History Control Table allows you to
add, edit and delete collection entries, or to select a specific index entry and then view the historical data in table
form. The History Table lists the Index, Sample Index, Interval Start, Description, Octets, Packets, Broadcast
Packets, Multicast Packets, CRCA Align Errors, Undersize Packets, Oversize Packets, Fragments, Jabbers,
Collisions, and Utilization.
Statistics Tab - RMON Alarm
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.
The RMON Alarms screen allows you to record important events and critical network problems. The RMON Alarm
and Event Control Tables are used together to define specific criteria that will generate response events.
Alarms can be set to test data over any specified time interval and can monitor absolute or changing values, such
as a statistical counter reaching a specific value, or a statistic changing by a certain amount over a set interval.
Alarms can be set to respond to either rising or falling thresholds.
The Alarm Control Table allows you to add, update and delete specific index entries.Interface. The selected
interface on the Switch.
Interface.
Displays the interface for which RMON statistics are displayed. The possible field values are:
•
Port.
Displays the RMON statistics for the selected port.
•
LAG.
Displays the RMON statistics for the selected LAG.
Statistics
. The traffic statistics to be sampled. Select from the drop-down list.
Interval
. The time interval in seconds over which data is sampled and compared with the rising or falling
threshold.
Figure 5-19: RMON History Table
Figure 5-20: Statistics - RMON Alarm
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41
Chapter 5: Using the Web-based Utility for Configuration
Statistics Tab - RMON Alarm
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
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.
Startup Alarm
. How the alarm is activated when the variable is compared to the thresholds. This can be set to
Rising, Falling, or Rising or Falling.
Rising Threshold
. An alarm threshold for the sampled variable. If the current value is greater than or equal to the
threshold, and the last sample value was less than the threshold, then an alarm will be generated. (After a rising
event has been generated, another such event will not be generated until the sampled value has fallen below the
Rising Threshold and reaches the Falling Threshold.)
Falling Threshold
. An alarm threshold for the sampled variable. If the current value is less than or equal to the
threshold, and the last sample value was greater than the threshold, then an alarm will be generated. (After a
falling event has been generated, another such event will not be generated until the sampled value has risen
above the Falling Threshold and reaches the Rising Threshold.)
Rising Event Index.
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 Event. The index of the Event that will be used if a falling alarm is triggered. If there is no corresponding
entry in the Event Control Table, or if this number is zero, then no event will be generated.Owner. The name of the
person who created this entry in the Control Table. (Maximum 127 characters)
Falling Event Index.
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.
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