![]() ![]() Using the OSI-RM allows you to check common. Test disabling TCP delayed ACKs Monitor for TCP retransmissions and test tuning TCP/IP network buffer sizes. With these tools, you can assess the lower layers of your system's network configuration within the model known as the Open Systems Interconnection (OSI) Reference Model (RM) (see Table 1). If youre not tight on RAM, tune Virtual Ethernet Adapter minimum and maximum buffers on all AIX LPARs (including VIO) to maximum possible values to avoid TCP retransmits. The ipreport command can be used to transform the trace file generated by iptrace to human readable format: # ipreport trace.out > trace. The AIX commands you can use for a quick checkup include the lsdev, errpt, netstat and tcpdump commands. Run iptrace on AIX interface en1 to capture port 80 traffic to file trace.out from a single client IP to a server IP: # iptrace -a -i en1 -s clientip -b -d serverip -p 80 trace.outThis trace will capture both directions of the port 80 traffic on interface en1 between the clientip and serverip and sends this to the raw file of trace.out. -i Only trace for network traffic on a specific interface.From: (Andreas Siegert) Do the following: iptrace -i en0 /tmp/ipt. -b Capture bidirectional network traffic (send and receive packets). Running on 3.2, named dies frequently on networks primary name server.-d Limit trace to destination IP, if known.-s Limit trace to source/client IP address, if known.You can use any combination of these options, but you do not need to use them all: The iptrace command can be very useful to find out what network traffic flows to and from an AIX system.
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