I've found, what i think is a bug, in our CSM and want to share, and hopefully you've something to add (or solve?)
cisco CSM software 4.2.11 on a 6509 chassis, software 12.2.18 SXF15a
When configured a VIP with either ssl stickiness or regular stickiness, i noticed that the CSM is stripping all tcp options (except mss) in the first tcp/ip syn packet.
so, loosing tcp options like: Selective ACK, window scaling, tcp timestamps, which are the basics of high performance TCP/IP.
Without stickness, the tcp options are not touched.
Does anyone recognize this phenomena ?
PS: i noticed this after a complaint of a very slow website hosted by us in combination of some packetloss at the client.