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rsbs01's avatar
rsbs01
Icon for Nimbostratus rankNimbostratus
Mar 14, 2018

Time-out value, when node is set to Forced Offline.

Here is the situation: 1.)When you set to Disabled, a node or pool member continues to process persistent and active connections. It can accept new connections only if the connections belong to an existing persistence session. 2.)When you set to Forced Offline, a node or pool member allows existing connections to time out, but no new connections are allowed. I understand this concept. But my question is, what is the value of the timeout for the point 2.). For how long the existing connection will be there before they will be timed out?

 

  • Well the time-out value is independent of different states like offline, forced-offline etc. Meaning it doesn't change.

     

    The time-out value is defined in the profile which is mapped to the VS.

     

    Default timeout values

     

    Lets you have a connection established, which is an existing connection on the bigip table. As long as that session is not closed by Connection: Close in the header, its still an existing connection & not a new connection. On packet level your tcp port remains same throughout that connection.

     

    Also if you start seeing in terms of redirection, the TCP port used by the client changes too. This would mean its a new TCP connection. Its no more an existing connection.

     

    Based on the new connection or existing connection, the traffic will be sent to the available pool member, as in force-offline member will no longer receive traffic for new connections.