RE: SNA over IP

[Chris Bipes <chris.bipes@xxxxxxxxxxxxxxx>]

SNA is very chatty.  It will add to your network utilization.  Also
encapsulation any protocol over another adds over head.  Thus the IOP
processors have more work to do.  If you are a very heavy user of the SNA,
it will effect performance.  I have 3 as400s all running ANYNET and it is
fast on the 170 and 720.  They both have PCI 10/100 Ethernet cards, with the
720 having two.  The model 400 running an older SPD IPCS card at 10mb had a
noticeable slow down.  The change does not effect straight TCP/IP, just the
IOP.  If the IOP is overloaded, then you will notice a slow down of straight
TCP/IP.  We have not had any problems on either of the boxes with ANYNET.
When IBM gets all the neat SNA function re-written to TCP/IP you will not
need ANYNET, but till then...  Tell me why do you need Anynet turned on?
What is the application?

HTH,



Christopher K. Bipes    mailto:ChrisB@Cross-Check.com
Sr. Programmer/Analyst  mailto:Chris_Bipes@Yahoo.com
CrossCheck, Inc.        http://www.cross-check.com
6119 State Farm Drive   Phone: 707 586-0551 x 1102
Rohnert Park CA  94928  Fax: 707 586-1884

If consistency is the hobgoblin of little minds, only geniuses work here.
Karen Herbelin - Readers Digest 3/2000

-----Original Message-----
From: Jim Knight [mailto:jknight@rei.com]
Sent: Wednesday, October 04, 2000 8:14 AM
To: 'Midrange Users list'
Subject: SNA over IP


We are looking at utilizing APPC over IP via ANYNET.  We have several
processes that use IP sockets
to look up data from our RS/6000s.  I read in the Communications
Configuration Manual that by 
activating ANYNET, our sockets programs will run slower.  This is the V4R1
manual.  Is this still
true on V4R4??
+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---