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Operating Systems AIX AIX server problem - network connection is unstable ! Post 303044690 by Neo on Sunday 1st of March 2020 11:07:34 PM
Old 03-02-2020
Quote:
Originally Posted by bobochacha29
On this ethernet segment we have many servers, but only these two servers got error, so I don't think this's the point.
A slight delay in a packet on a busy Ethernet segment is not "an error". That is how Ethernet works.

What you are "showing us' (an occasional 44 ms delay) is typical of all busy Ethernet segments with many devices.

44 ms is 44 one thousandths of a second. 44/1000 seconds.

The way in which you answer my questions shows you do not understand LAN networking and Ethernet (or networking in general).

Delays on an Ethernet segment are not "errors" and nor is it a sign of "instability". This his how the Ethernet (and indeed most networking protocols work) protocols works (queues, delays, priorities).

If you want guaranteed fast delivery between two hosts, you need to move them to their own Ethernet segment with only two devices on that network.

This is the only approach any experienced network engineer would take or advise.

Think about how Ethernet works. Every device wants to talk at the same time on the same wire. They cannot talk at the same time. The more devices, the more this happens. Each device will wait a random number of milliseconds to transmit when the network is busy. This is now LANs work. The more devices, the more a chance of a delay. So..... a 44ms delay (44/1000 of a second) occasionally on a busy LAN segment is normal.

As I mentioned to you, but you do not seem to want to understand, you want guaranteed fast delivery between two hosts on a LAN segment, you need to move them to their own Ethernet segment with only two devices on that physical networking segment.
 

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spray(1M)						  System Administration Commands						 spray(1M)

NAME
spray - spray packets SYNOPSIS
/usr/sbin/spray [-c count] [-d delay] [-l length] [-t nettype] host DESCRIPTION
spray sends a one-way stream of packets to host using RPC, and reports how many were received, as well as the transfer rate. The host argu- ment can be either a name or an Internet address. spray is not useful as a networking benchmark, as it uses unreliable connectionless transports, UDP for example. spray can report a large number of packets dropped when the drops were caused by spray sending packets faster than they can be buffered locally, that is, before the packets get to the network medium. OPTIONS
-c count Specify how many packets to send. The default value of count is the number of packets required to make the total stream size 100000 bytes. -d delay Specify how many microseconds to pause between sending each packet. The default is 0. -l length The length parameter is the numbers of bytes in the Ethernet packet that holds the RPC call message. Since the data is encoded using XDR, and XDR only deals with 32 bit quantities, not all values of length are possible, and spray rounds up to the nearest possible value. When length is greater than 1514, then the RPC call can no longer be encapsulated in one Ethernet packet, so the length field no longer has a simple correspondence to Ethernet packet size. The default value of length is 86 bytes, the size of the RPC and UDP headers. -t nettype Specify class of transports. Defaults to netpath. See rpc(3NSL) for a description of supported classes. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWrcmdc | +-----------------------------+-----------------------------+ SEE ALSO
rpc(3NSL), attributes(5) SunOS 5.11 6 Nov 2000 spray(1M)
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