I can't say about TN3270, but if you assume that all encryption has the same cost (i.e. cost per MB), then:
On SLES10, FTP encryption seemed to become the default vs older Suse systems. When I FTP iso images now, it takes 4 X the CPU power then the non-encrypted version. This is based on our z/890 IFL. So, my first guess is 4 times the current cost of your TCPIP stack. Tom Duerbusch THD Consulting FELINE PHYSICS: Law of Cat Motion A cat will move in a straight line, unless there is a really good reason to change direction. >>> Alan Ackerman <[EMAIL PROTECTED]> 10/16/2007 6:01 PM >>> We have been asked to encrypt all TN3270 traffic to our VM systems (5 LPARS + 14? guests). I am planning to use the VM SSLSERV, running on Red Hat (RHEL 4) Linux. My management wants me to estimate the MIPS (or CPU cycles) cost of this. Any ideas? I can get number of users logged in via TCP/IP via NETSTAT TELNET, so a per-user cost would be nice, or a total cost and number of logged-in users, but I will take any estimates you have. These are CMS users, or users dialing in to VTAM. (Existing Linux guests are not affected by this, as they already use encrypted TELNET.) z/VM 5.3.0 (soon) on z9 EC processors. QWS3270 Secure (although I don't think the PC client makes any difference).
