Switching
Loop Guard
This section shows you how to configure the Switch to guard against loops on the edge of your network.
Loop guard allows you to configure the Switch to shut down a port if it detects that packets sent out on that port loop back to the Switch.
The loop guard feature cannot be enabled on the ports that have Spanning Tree Protocol (RSTP) enabled.The following table describes the labels in this screen.
label | description |
|---|---|
Active | Set the switch to ON to enable loop guard on the Switch. The Switch generates syslog, internal log messages as well as SNMP traps when it shuts down a port through the loop guard feature. |
Port | This field displays the port number. |
* | Settings in this row apply to all ports. Use this row only if you want to make some settings the same for all ports. Use this row first to set the common settings and then make adjustments on a port-by-port basis. Changes in this row are copied to all the ports as soon as you make them. |
Active | Select this checkbox to enable the loop guard feature on this port. The Switch sends probe packets from this port to check if the switch it is connected to is in loop state. If the switch that this port is connected is in loop state the Switch will shut down this port. Clear this checkbox to disable the loop guard feature. |
Apply | Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these changes if it is turned off or loses power, so use the Save link on the top navigation panel to save your changes to the non-volatile memory when you are done configuring. |
Cancel | Click Cancel to begin configuring this screen afresh. |
ONVIF
When ONVIF (Open Network Video Interface Forum) is enabled and configured, the Switch can obtain the ONVIF security device’s information such as system name and IP address. This lets you to know which IP-based security products, for example IP camera or NVR (network video recorder), is connected to the Switch.
Use the ONVIF screen to enable the ONVIF protocol on the Switch.
The following table describes the labels in this screen.
label | description |
|---|---|
ONVIF | |
Active | Select Active to allow this Switch to send ONVIF packets to discover or scan for ONVIF-compatible IP-based security devices connected to its ports. Make sure to enter the port numbers in Port to allow discovery of ONVIF-compatible devices. |
Apply | Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these changes if it is turned off or loses power, so use the Save link on the top navigation panel to save your changes to the non-volatile memory when you are done configuring. |
Cancel | Click this to reset the values in this screen to their last-saved values. |
VLAN | |
Select an entry’s checkbox to select a specific entry. Otherwise, select the checkbox in the table heading row to select all entries. | |
Index | This is the index number of the ONVIF entry in the table. |
VID | This field displays the VLAN to which the ports belong. |
Port | This field displays the ports to which the Switch applies the settings. |
Add/Edit | Click this button to create new or configure ONVIF settings for the VLAN port. |
Delete | Click this button to remove the ONVIF settings for the VLAN port. |
VLAN
This section shows you how to configure 802.1Q tagged and port-based VLANs.
What You Can Do
• Use the VLAN Detail screen (VLAN Detail) to view detailed port settings and status of the VLAN group.
• Use the Static VLAN screen (Static VLAN) to configure and view 802.1Q VLAN parameters for the Switch.
• Use the VLAN Port Setting screen (VLAN Port Setup) to configure the static VLAN (IEEE 802.1Q) settings on a port.
See What You Need to Know for more information on VLAN.
VLAN Status
Use this screen to view and search all static VLAN groups.
The following table describes the labels in this screen.
label | description |
|---|---|
VLAN Search by VID | Enter an existing VLAN ID numbers (separated by a comma) and click Search to display only the specified VLANs in the list below. Leave this field blank and click Search to display all VLANs configured on the Switch. |
The Number of VLAN | This is the number of VLANs configured on the Switch. |
The Number of Search Results | This is the number of VLANs that match the searching criteria and display in the list below. This field displays only when you use the Search button to look for certain VLANs. |
Index | This is the VLAN index number. Click on an index number to view more VLAN details. |
VID | This is the VLAN identification number that was configured in the corresponding VLAN configuration screen. |
Name | This fields shows the descriptive name of the VLAN. |
Tagged Port | This field shows the tagged ports that are participating in the VLAN. |
Untagged Port | This field shows the untagged ports that are participating in the VLAN. |
Elapsed Time | This field shows how long it has been since a normal VLAN was registered or a static VLAN was set up. |
Status | This field shows how this VLAN was added to the Switch. Static: added as a permanent entry. |
Page | Click the forward or back icon to show the previous or next screen if all status information cannot be seen in one screen. Or enter the page number. |
VLAN Detail
Use this screen to view detailed port settings and status of the static VLAN group. Click on an index number in the VLAN Status screen to display VLAN details.
The following table describes the labels in this screen.
label | description |
|---|---|
VLAN Status | Click this to go to the VLAN Status screen. |
VID | This is the VLAN identification number that was configured in the corresponding VLAN configuration screen. |
Elapsed Time | This field shows how long it has been since a normal VLAN was registered or a static VLAN was set up. |
Status | This field shows how this VLAN was added to the Switch. Static: added as a permanent entry. |
Port Number | This column displays the ports that are participating in a VLAN. A tagged port is marked as T, an untagged port is marked as U and ports not participating in a VLAN are marked as “–“. |
Static VLAN
Use this screen to view static VLAN status for the Switch.
The following table describes the related labels in this screen.
label | Description |
|---|---|
Select an entry’s checkbox to select a specific entry. Otherwise, select the checkbox in the table heading row to select all entries. | |
VID | This field displays the ID number of the VLAN group. Click the number to edit the VLAN settings. |
Active | This field indicates whether the VLAN settings are enabled (ON) or disabled (OFF). |
Name | This field displays the descriptive name for this VLAN group. |
Add/Edit | Click this button to create a new or configure static VLAN. |
Delete | Click this button to remove the static VLAN. |
Use this screen to configure a static VLAN for the Switch.
The following table describes the related labels in this screen.
label | Description |
|---|---|
Active | Select this switch to activate the VLAN settings. |
Name | Enter a descriptive name for the VLAN group for identification purposes. This name consists of up to 64 printable characters. Spaces are allowed. |
VLAN Group ID | Enter the VLAN ID for this static entry; the valid range is between 1 and 4094. |
Port | The port number identifies the port you are configuring. |
* | Settings in this row apply to all ports. Use this row only if you want to make some settings the same for all ports. Use this row first to set the common settings and then make adjustments on a port-by-port basis. Changes in this row are copied to all the ports as soon as you make them. |
Control | Select Normal for the port to dynamically join this VLAN group. This is the default selection. Select Fixed for the port to be a permanent member of this VLAN group. Select Forbidden if you want to prohibit the port from joining this VLAN group. |
Tagging | Select TX Tagging if you want outgoing traffic to contain this VLAN tag. Otherwise, to ensure that VLAN-unaware devices (such as computers and hubs) can receive frames properly, clear the TX Tagging checkbox to set the Switch to remove VLAN tags before sending. |
Apply | Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these changes if it is turned off or loses power, so use the Save link on the top navigation panel to save your changes to the non-volatile memory when you are done configuring. |
Clear | Click Clear to reset the fields to the factory defaults. |
Cancel | Click Cancel to change the fields back to their last saved values. |
VLAN Port Setup
Use this screen to configure the static VLAN (IEEE 802.1Q) settings on a port. Click the VLAN Port Setup tab in the VLAN screen.
The following table describes the labels in this screen.
label | description |
|---|---|
Port | This field displays the port number. |
* | Settings in this row apply to all ports. Use this row only if you want to make some settings the same for all ports. Use this row first to set the common settings and then make adjustments on a port-by-port basis. Changes in this row are copied to all the ports as soon as you make them. |
Ingress Check | If this checkbox is selected, the Switch discards incoming frames on a port for VLANs that do not include this port in its member set. Clear this checkbox to disable ingress filtering. |
PVID | A PVID (Port VLAN ID) is a tag that adds to incoming untagged frames received on a port so that the frames are forwarded to the VLAN group that the tag defines. Enter a number between 1and 4094 as the port VLAN ID. |
Acceptable Frame Type | Specify the type of frames allowed on a port. Choices are All, Tag Only and Untag Only. Select All from the drop-down list box to accept all untagged or tagged frames on this port. This is the default setting. Select Tag Only to accept only tagged frames on this port. All untagged frames will be dropped. Select Untag Only to accept only untagged frames on this port. All tagged frames will be dropped. |
VLAN Trunking | Enable VLAN Trunking on ports connected to other switches or routers (but not ports directly connected to end users) to allow frames belonging to unknown VLAN groups to pass through the Switch. |
Isolation | Select this to allows this port to communicate only with the CPU management port and the ports on which the isolation feature is NOT enabled. |
Apply | Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these changes if it is turned off or loses power, so use the Save link on the top navigation panel to save your changes to the non-volatile memory when you are done configuring. |
Cancel | Click Cancel to begin configuring this screen afresh. |