Table of Contents
Select the → menu item to launch the Configure switches dialog. This dialog contains a table which lists all the switches that sFlowTrend-Pro is receiving sFlow from. It also allows you to change the SNMP settings for individual switches and to tell sFlowTrend-Pro about switches that it should configure via SNMP to send sFlow.
The table includes the following columns:
- Status
-
This column uses colour coded symbols to indicate the overall status of the switch:
The switch is enabled and sFlowTrend-Pro is
receiving sFlow and can communicate with the
switch using SNMP.
The switch is enabled but sFlowTrend-Pro is not
receiving sFlow or cannot communicate with the
switch by SNMP. Or the switch is disabled but
sFlowTrend-Pro is receiving sFlow. See
Section 9.1.6, “sFlowTrend-Pro is not receiving sFlow from switch”
and
Section 9.1.7, “sFlowTrend-Pro cannot communicate with the switch using SNMP”.
The switch is enabled, but sFlowTrend-Pro is not
receiving sFlow and cannot communicate with
the switch using SNMP. See
Section 9.1.6, “sFlowTrend-Pro is not receiving sFlow from switch”
and
Section 9.1.7, “sFlowTrend-Pro cannot communicate with the switch using SNMP”.
The switch is disabled and sFlowTrend-Pro is not
receiving sFlow from the switch.
A switch setting has been changed in the
Configure switches dialog,
but the change has not been deployed (operation
pending). sFlowTrend-Pro will deploy the change when
you click the button.
The tooltip for the status symbol gives more detail on the status of the switch.
- DNS name
- The domain name obtained from the reverse DNS lookup of the SNMP IP address of the switch.
- SNMP IP address
- The IP address that sFlowTrend-Pro will use to communicate with the switch via SNMP to obtain the friendly system and interface names. This is also the IP address that sFlowTrend-Pro will use when using SNMP to configure the switch to send sFlow, if Configure via SNMP is selected.
- sFlow agent address
- sFlow agent address The IP address that is used by the sFlow agent on the switch to uniquely identify the switch. This address is learnt from the sFlow data and cannot be changed in sFlowTrend-Pro. In many cases the sFlow agent address will be the same as the SNMP IP address, however if the switch is switching between multiple VLANs, the sFlow agent address may be in a VLAN that is not routable to the host that is running sFlowTrend-Pro. In which case you can edit the SNMP IP address field to tell sFlowTrend-Pro how to communicate with the switch.
- Use global SNMP settings
-
Tick this box if you would like sFlowTrend-Pro to use
the global SNMP settings (see
Section 8.2.2, “Configuring global SNMP settings
”)
when communicating with the switch using SNMP.
If this box is not ticked you can specify the
SNMP settings for this switch by clicking on the
button.
sFlowTrend-Pro uses SNMP to query the switch for the
systemGroup and ifTable, so that it can present
friendly names for the switch and its interfaces.
If sFlowTrend-Pro is to use SNMP to configure the switch
to send sFlow, these settings must allow write
access to the sFlow MIB.
- Configure sFlow via SNMP
- Tick this checkbox if you would like sFlowTrend-Pro to use SNMP to configure the switch to send sFlow.
- Enable
- Tick this checkbox if you would like sFlowTrend-Pro to store data for this switch.
-
Edit
- Although most of the commonly changed switch settings can be edited in the table, you can edit all the settings for a switch and view the detailed status of the switch by clicking on this button.
-
Delete
- Delete the switch from the sFlowTrend-Pro and stop further data collection. If this switch has been configured by SNMP to send sFlow, sFlowTrend-Pro will disable sFlow before deleting the switch.
You can click with the button on a column heading to sort the table by that column. You can also click with the Shift+ mouse button to add secondary sort columns.
Any changes made to switches and their settings will not be implemented until the button is clicked.
Clicking on the button launches a dialog that allows you to enter the details for a new switch. This should be used when you wish to tell sFlowTrend-Pro about a switch that should be configured via SNMP to send sFlow. Enter the following information:
- SNMP IP address
- The IP address that sFlowTrend-Pro should use when communicating with the switch via SNMP.
- Use global SNMP settings
-
Tick this box if you would like sFlowTrend-Pro to use
the global SNMP settings (see
Section 8.2.2, “Configuring global SNMP settings ”).
If this box is unticked, you can click on
to
specify the SNMP settings specific to this switch.
You can ask sFlowTrend-Pro to communicate with the switch
using SNMP v2c or v3.
Make sure that the SNMP settings that you enter will
sFlowTrend-Pro write access to the sFlow MIB.
- Enable
- Tick this box if you want sFlowTrend-Pro to enable and start collecting data from this switch. sFlowTrend allows data to be collected from only one switch, so if another switch is already enabled, the Enable checkbox will be inactive and you must disable the other switch before you can enable the new switch.
- Configure sFlow via SNMP
- Tick this box if sFlowTrend-Pro is to use SNMP to configure the switch to send sFlow.
sFlowTrend-Pro will not configure the switch until the Configure switches dialog has been closed by clicking the button.
The Configure switches dialog allows you to
export configuration by selecting
→ . The exported configuration is stored as
XML.
You can import previously exported switch configuration, by selecting → . If the imported configuration includes switches that are already present in the current configuration, then the imported configuration settings will overwrite the existing settings.
Once you have submitted the changes that you have made in the Configure switches dialog, by clicking the button, when you go to the Charts, Interfaces, or Wireless tabs and select a switch, the sFlowTrend-Pro status bar (see Section 1.1, “Introducing sFlowTrend-Pro”) will show the status of the switch that is currently selected. The message in the status bar will give information on whether sFlowTrend-Pro can communicate with the selected switch using SNMP, has successfully used SNMP to configure the selected switch to send sFlow (if this option has been chosen), and whether sFlowTrend-Pro is receiving sFlow from the selected switch.
You can also view the status of a switch by selecting the
→
menu item to launch the
Configure switches
dialog and then viewing the tooltip for the colour coded
switch status symbol or using the edit
button to view the detailed status of a switch
(see above).
The status message will also indicate if there is a problem with the configuration, for example:
- No SNMP
- sFlowTrend-Pro cannot communicate with the switch using SNMP. Verify that the sFlowTrend-Pro is using the correct SNMP settings and that there are no firewalls in the network or on the host that are blocking SNMP. See Section 9.1.7, “sFlowTrend-Pro cannot communicate with the switch using SNMP” for troubleshooting tips.
- Cannot configure sFlow with SNMP - SNMP write access denied
- sFlowTrend-Pro is not using the correct SNMP settings that allow write access to the sFlow MIB or the switch is not configured to allow SNMP set from the system running sFlowTrend-Pro.
- Cannot configure sFlow with SNMP - no sFlow MIB
- The switch cannot be configured via SNMP to send sFlow. Instead, you must use the switch CLI to configure sFlow (see Section A.1, “Configuring switches to send sFlow”.
- Already in use
-
Another application has already
configured this switch to send sFlow
and there are no additional resources to
send sFlow to sFlowTrend-Pro as well.
Disable the other application so that
the switch can be configured by
sFlowTrend-Pro. You can identify the other
applications which have already
configured the switch by using the edit
button. The
Additional switch details
section, under Other owners
lists the IP addresses of the other
systems which have configured the switch,
together with a description of the
application.