Dell PowerConnect W-AirWave 7.4 Manual de usuario descargar pdf (Pagina 146)

146 | Discovering, Adding, and Managing Devices Dell PowerConnect W-AirWave 7.4 | User Guide

Troubleshooting a Newly Discovered Down Device

If the device status on the APs/Devices > List page remains Down after it has been added to a group, the most

likely source of the problem is an error in the SNMP community string being used to manage the device. Perform

the following steps to troubleshoot this scenario.

1. Select the Name of the down device in the list of devices on the APs/Devices > List or APs/Devices > Down

page. This automatically directs you to the APs/Device > Monitor page for that device.

2. Locate the Status field in the Device Info section. If the Status is Down, it includes a description of the cause

of the problem. Some of the common system messages are as follows in Table 88:

3. If the SNMP Get Failed message appears, select the APs/Devices > Manage tab to go to the management

page for that device.

4. If visible, select the View Device Credentials link in the Device Communications section of APs/Devices >

Manage. This displays the credentials AirWave is using unsuccessfully to communicate with the device. This

link can be removed from AirWave for security reasons by setting a flag in AirWave. Only users with root

Table 88 Common System Messages for Down Status

Message Meaning

AP is no longer associated

with controller

This means the AP no longer shows up in any controller's AP list (on the AirWave server). Either

the AP was removed from the controller, or it has roamed to another controller that AirWave does

not have visibility to, or it is offline.

Controller is Down When a controller goes down, AMP automatically marks all associated thin APs down (because

communication to thin APs are via the controller and AirWave assumes that if the Controller has

gone offline then all associated APs are down as well until reassociated another Controller).

Downloading The AP is in the process of downloading firmware or configuration (only applies to Cisco WLC thin

APs and some Symbol APs).

Error fetching existing

configuration

AMP could not fetch a config for the AP. Usually this is because the AMP has incorrect credentials

and was not able to log in.

ICMP Ping Failed (after

SNMP Get Failed)

The device is not responding and is likely offline.

SNMP Get Failed SNMP credentials and/or configuration may be incorrect. Verify that SNMP is enabled and that

credentials and access ports are configured correctly on both the target device and in AirWave.

SNMP Trap AMP received an SNMP trap from the controller indicating that the AP is no longer associated to

the controller.

Telnet Error: command

timed out

Telnet/SSH username and password specified for that device is incorrect.

Unexpected LAN MAC

Address found at this

device’s IP address

If AMP detects that the LAN MAC address of a device has changed this error message will appear.

This usually indicates that a physical hardware change has occurred (while reusing the same IP

Address) without using the Replace Hardware feature in AirWave. This error may also indicate an

IP address conflict between two or more devices.

When an unexpected LAN MAC address is seen in a device's IP address, its APs/Devices >

Manage page displays the message “Click Replace Hardware (preferred) or Reset MAC Address

to reset the LAN MAC address if this device has been replaced with new hardware” at the top of

the page. Use the Replace Hardware button at the bottom of that page in order to avoid this

message.

NOTE: To view the detailed status of all your down devices at once, navigate to APs/Devices > Down (try the Down top header

stats link) and look at the Detailed Status column for the list of down devices. This column can be sorted using the Filter icon ().

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Dell PowerConnect W-AirWave 7.4 Manual de usuario Pagina 146

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Dell PowerConnect W-AirWave 7.4 Manual de usuario Pagina 146

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