Originally posted by: kyle@cmbchina.com

Hi,

With APV we build more than 20 LPARs as VIO Clients on one system p5 server, and these VIO Clients communicat each other using Virtual LAN and sharing one physical network apdater to reach outside networks. However the network is unstable, not only among VIO Clients, but also between VIO Client and other LPARs(Not using Virtual LAN but physical adapters), tested with command spray, there're significant packet loss. Even tryng spary 127.0.0.1 on VIO Clients, still did I get packet loss:

VIO Clients:
t24_web1: 99.1.57.183
dw_1: 99.1.57.18

t24_web1:/home/qadmwt#/usr/etc/spray 127.0.0.1 -c 2000 -l 1400 -d 1
sending 2000 packets of length 1402 to
loopback ...

689 packets (34.450%) dropped by loopback
23361 packets/second, 32752222 bytes/second

And I tried repeating 1000 times, of which got 'packet loss' 817 times.

t24_web1:/home/qadmwt#/usr/etc/spray 99.1.57.18 -c 2000 -l 1400 -d 1
sending 2000 packets of length 1402 to
dw_1 ...

796 packets (39.800%) dropped by dw_1
24438 packets/second, 34263142 bytes/second

So, any clue please?
#AIX-Forum

Originally posted by: CRM

Use netstat -v to look for memory buffers being filled.

Also what are your CPU stats on the box? I would guess you are using most of the processing power here and that may also be something to watch out for.

regards

Chris
#AIX-Forum

Originally posted by: cd3lgado

Hi

Please check latest available levels for your VIOS version and microcode for your pSeries server. Update or Upgrade is necessary from time to time.

If you have a VIOS LPAR running a SEA device please review that underlaying physical adapter is configured as fixed speed and full duplex.

Hope this helps
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