Monitoring Device Administration › Create a Pair of Monitor Feeds

Create a Pair of Monitor Feeds

If you have load-balanced server traffic between 2 switches, or you have a primary switch and a secondary switch for failover purposes, create a pair of monitor feeds to enable the management console to automatically monitor assigned servers from both monitor feeds. With a pair of monitor feeds, the management console immediately reports the application traffic from either monitor feed.

Warning: Duplicate data will result if a pair of monitor feeds see the same traffic.

In the case of a failover, if you do not create a pair of monitor feeds and the server moves to a different location, it can take up to 1 hour for the management console to assign a new monitor feed and resume monitoring the applications hosted by the server.

For example, if you have two switches that are functioning as peers in a load-balanced configuration, the traffic between client networks and servers might be present on either switch, and the SPAN data from each switch is sent to a different monitoring device. If a server is associated with either one of these paired monitor feeds, the response time data for that server will be collected from both monitor feeds; in effect, there are two "best" monitor feeds for the server.

For WAN-optimized environments, the management console automatically computes response times from all WAN optimization devices, therefore, you do not need to assign a WAN Opt monitor feed to a server.

If you create a pair of monitor feeds, keep in mind that there will be differences in the observed response times between the primary and secondary monitor feed, for example, because of the location of the monitoring device and the server traffic that is available from that location, and changes in the proximity of the monitoring device to the server traffic.

Follow these steps:

1. Click the Administration page.
2. Click Data Monitoring, Monitoring Devices in the Show Me menu.
3. Scroll to the ADA Monitoring Device List and click to edit a CA Standard Monitor or CA Multi-Port Monitor.

   The Monitor Properties opens.

4. Scroll down to Monitor Feeds.
5. Click to edit a monitor feed.
6. Click the Secondary Feeds list to assign a secondary monitor feed to:
   • The Packets monitor feed on a CA Standard Monitor
   • The WAN Opt or GigaStor monitor feeds on a CA Standard Monitor or CA Multi-Port Monitor
   • The Multi-Port monitor feed on the CA Multi-Port Monitor.
7. Click Update to apply your changes.

More information:

Managing Tenants

How Monitoring Devices Work