Re: 6.5.4 upgrades - do or die tomorrow

Chris, 

I am running 6.5.4 now on all servers with NO Notes Client issues. 

Ask for Doreen Ward at IBM iSeries/400 Advanced Support

Based our consulting engagement with IBM and AT&T, and allot of testing on 
my part in conjunction with our Networking team etc, 
we changed a few settings and applied a custom PTF which fixed latency on 
slow connections. 

1) We created static routes for our NIC Cards, so the traffic returns to 
the NIC it came from. 

(I edited the IPs  for security reasons)

                           Work with TCP/IP Routes 
                                                            System: 
XXXXXXXXXX
Type options, press Enter. 
  1=Add   2=Change   4=Remove   5=Display 
 
     Route            Subnet           Next             Preferred 
Opt  Destination      Mask             Hop              Interface 
 
     *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
     *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
     *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
     *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
     *DFTROUTE        *NONE            192.168.XX.X    192.168.XX.XX 
     *DFTROUTE        *NONE            192.168.XX.X    192.168.XX.XX 
     *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
     *DFTROUTE        *NONE            192.168.XX.X     192.168.XX.XX 
 
 
    2) We changed the    TCP closed timewait timeout  . .   to 0. 

 Default is default 2 minutes and connections would stay open waiting for 
a final ACK ,that sometimes never came.

This solved allot of the hung connection issues we were having!         

 TCP R1 retransmission count  . .   3 
 TCP R2 retransmission count  . .   16 
 TCP minimum retransmit time  . .   750 
 TCP closed timewait timeout  . .   0 
 TCP close connection message . .   *THRESHOLD 
 UDP checksum . . . . . . . . . .   *YES 
 Path MTU discovery: 


3)We also applied a PTF for TCP/IP Slow start which should be in the 
cumulative by now.

4) We also Changed the TCP minimum retransmit time  . .   750     since we 
were having allot of retransmissions over slow links. 

What PTF Levels are you on?

Sean