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Operating Systems AIX AIX server problem - network connection is unstable ! Post 303044689 by bobochacha29 on Sunday 1st of March 2020 10:33:31 PM
Old 03-01-2020
Quote:
Regarding your arp it looks fairly clear to me that you have a lot of devices on this ethernet segment.

When you have many devices on the same segment, sometimes packets will be delayed. That is now networking works.
On this ethernet segment we have many servers, but only these two servers got error, so I don't think this's the point.

Quote:
Might want to look into getting your partition running in Power8 mode instead of Power7 compatibility mode. Also should think about getting off of AIX 6.1.

Have you check to see if there are any hardware problems or errors on the network interface?
This could be a point - we installed AIX 6.1 on an IBM p8 server but we're not sure. Do you have any suggesions? The network and hardware devices is OK
 

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SETETHER(8)						      System Manager's Manual						       SETETHER(8)

NAME
setether - Set the ethernet address for use with DECnet SYNOPSIS
setether <if> [<if>...]|all [options] DESCRIPTION
Set ethernet MAC address on ethernet adaptors This script should be run at system startup. It will change the ethernet hardware (MAC) address of any or all ethernet interfaces to match the DECnet node address. DECnet requires that the MAC address of all ethernet adaptors running the protocol be set approriately. If you do not run setether then you must change the ethernet address in some other way for DECnet to work. By default no ethernet interfaces will have their MAC addresses changed by setether, if you specify all then all interfaces name eth* will be changed, otherwise a list of interface names can be specified. setether will enable (UP) all interfaces it changes the MAC addresses of. (2.4 only) The first interface specified on the command-line will also be made the default interface for DECnet operations (ie attempts to contact nodes not in the neighbour table will be done over this interface). This script must be run with the interface inactive, it is normally run from /etc/init.d/decnet before TCP/IP starts up. EXAMPLES
set the MAC address of eth0. # /sbin/setether eth0 set the MAC address of all ethernet interfaces # /sbin/setether all HELPFUL HINTS
If you have multiple ethernet cards on your system and they are connected to the the same network you should specify which one you want to use for DECnet communication on the setether command line, otherwise they will both be given the same MAC address and this is probably not what you want. Running DECnet on multiple ethernet interfaces only works under Linux 2.4. If you are running Linux 2.2 then the interface name on the setether command line must match the one in /etc/decnet.conf(5). SEE ALSO
decnet.conf(5), dntype(1), dndir(1), dndel(1), dnetd(8), dnping(1) DECnet utilities March 01 2001 SETETHER(8)
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