Dell PowerConnect W-Airwave 8.0 Manual de usuario Pagina 275

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275 | Performing Daily Administration in AirWave Dell Networking W-AirWave 8.0 | User Guide
Using AirWave Failover for Backup
The failover version of AirWave provides a many-to-one hot backup server. The Failover AirWave polls the watched
AirWaves to verify that each is up and running. If the watched AirWave is unreachable for the specified number of polls,
the Failover AirWave automatically restores the most recent saved backup from the watched AirWave and begins
polling its APs.
Navigation Section of AirWave Failover
The Navigation section displays tabs to all main GUI pages within AirWave Failover. The top bar is a static navigation
bar containing tabs for the main components of AirWave, while the lower bar is context-sensitive and displays the
subtabs for the highlighted tab. Table 131 describes the contents of this page.
Main Tab Description Subtabs
Home
The Home page provides basic AirWave Failover information
including system name, hostname, IP address, current time, running
time, software version, and watched AirWave information.
l Overview
l User Info
l Watched AMPs
l License
System
The System page provides information related to AirWave operation
and administration including overall system status, performance
monitoring, and backups.
l Status
l Triggers
l Alerts
l Event Log
l Backups
l Performance
AMP
Setup
The Setup page provides all information relating to the configuration
of AirWave itself and its connection to your network.
l General
l Network
l Users
l TACACS+
Table 131:
Contents of the Navigation Section of Failover
Adding Watched AirWave Stations
Navigate to the Home > Watched AMPs page to begin backing up and monitoring AirWave stations. Once an AirWave
installation has been added to the Watched AMPs list, the Failover AMP will download the most recent backup and
begin polling. The Failover AMP and the Watched AMP must be on the same version or else the watched AMP will be
unable to restore properly. If any of the watched AMPs are not on the same version, you will need to upgrade. The
Failover AMP will need HTTPS access (port 443) to the watched AMP to verify that the web page is active and to fetch
downloads.
Once the Failover AMP determines that the Watched AMP s not up (based on the user-defined missed poll threshold), it
will restore the data backup of the Watched AMP and begin monitoring the watched AMP APs and devices. There are
many variables that affect how long this will take including how long client historical data is being retained, but for an
AMP with 1,000 APs it might take up to 10 minutes. For an AMP with 2,500 APs, it might take as long as 20 minutes.
The Failover AMP will retain its original IP address.
In summary, the Failover AMP could take over for the Watched AMP in as little as five minutes; it might take up to an
additional 10-20 minutes to unpack the watched AMP data and begin monitoring APs. The most important factors are
the missed poll threshold, which is defined by the user, and the size of the watched AirWave backup, which is affected
by the total number of APs and by the amount of data being saved, especially client historical data.
To restore the Watched AMP, run the backup script from the command line and copy the current data file and the old
Watched AMP configuration file to the Watched AMP. Then run the restore script. More information about backups and
restores can be found in "Backing Up AirWave" on page 231.
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