[f-nsp] connection drops on serveriron XL problem

[dalton]

Hi.


I am running ver 07.4.00T12 on serveriron XL with  400 MHz Power PC
processor 740 (revision 8) with 32756K bytes of DRAM. We have been running
on these specs for a while now, without seeing the problem I am seeing now
 with a specific customer.

The issue is, verified via testing. running a test against a vip, of 50
thousand requests, 1 out of 1000 are being dropped. It is not restricted
to
http or any particular protocol. And running the test directly against the
servers themselves reveals no drops. I have checked through the foundry
docs and cannot find any limit in the OS that would account for this.
I have verified this problem as well on the another load balancer (to
tentatively rule out hardware).
I apologize for the vagueness of the question, but has anyone else
experienced something similar to this? Is there a limit I'm missing here?
Could it be a bug in 7.4?

Thanks for any insight, as I'm kind of banging my head against a wall on
this. here is the output of sh server and sh server sessions.

sh server:

 Server Load Balancing Traffic Info
Client->Server       =  363526315  Server->Client       =          0
Drops                =    2736768  Aged                 =    2631474
Fw_drops             =          0  Rev_drops            =          0
FIN_or_RST           =   56484048  old-conn             =      19594
Disable_drop         =          0  Exceed_drop          =          0
Stale_drop           =         73  Unsuccessful         =       4893
TCP SYN-DEF RST      =          0  Server Resets        =          0
Out of Memory        =          0  Out of Memory        =          0

Avail. Sessions      =     519420  Total Sessions       =     524288
Total C->S Conn      =  280781382  Total S->C Conn      =          0
Total Reassign       =          0  Unsuccessful Conn    =       4893

sessions:

Avail. Sessions      =     519655  Total Sessions       =     524288
Total C->S Conn      =  280793830  Total S->C Conn      =          0
Total Reassign       =          0  Unsuccessful Conn    =       4893

config below:


Regards,
Dalton