CSS: check the avalablity real server

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Aug 23rd, 2008
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we deployed layer 2 CSS for load balance, and it just basic configuration. does the basic configuration can detect 1 real server down and auto switch to another server?

If not, what configuration we need to make sure:

if user request been redirect to server 1;

server 1 down while user connecting to it;

CSS detects it and forward the request to server 2.

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Gilles Dufour Mon, 08/25/2008 - 00:24
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  • Cisco Employee,

There is automatic icmp probe.

If your server stops responding to ping request, the CSS will consider it is down.

You can adjust the probe to sth else - like http probe - using the keepalive command.


If a request is sent to a server that has not yet been detected a down, there is no automatic redirect.

The client connection will fail and when the client will attempt a new connection it will be sent to the other server.


Gilles.

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