WAAS active auto-discovery flows

[Tammy Cox]

Do the active auto-discovery flows count as a licensed flow? My understanding is that those are flows that have not been fully set up to become optimized or pass-through.  If I am licensed for 2500 concurrent connections, do the active auto-discovery flows consume a licensed connection?

[finn.poulsen]

Hi Tammy,

For a short period of time (during the 3-way TCP handshake) these flows are counted as a TCP connection and therefore counted in the license.If the TCP session are determined to be placed in "pass-through"this one session is deducted from the count.

The "current" usage can be determined by issuing "show stat tfo".

Sometime when a client is infected and tries to set up a lot of sessions (or port-scan like application) you can encounter overload situations on a WAAs devices, because the client spawns a lot of TCP sessions, which never gets established.

Best regards

Finn