Sponsored Content
Operating Systems AIX AIX server problem - network connection is unstable ! Post 303045091 by zxmaus on Wednesday 11th of March 2020 07:53:55 PM
Old 03-11-2020
ok - so you have some link aggregations with 100/1000 and some with 10G adapters. The 10G will almost always be faster. Considering how many 10G ports you have on your box, you may want to consider to move all of them to 10G instead? That would make tuning your network much easier.

If / when you do this, after long and exhausting RAC testing on our systems (similar hardware), we have found below network tunables to be the most beneficial for us. But be careful - do not change all of them at once - but one by one and see if your performance gets better, worse or remains the same.
You can change them via no -p -o name=value - note there is NO space before and after the equal sign in the command to change them.

Code:
hstcp = 1
lo_perf = 1
rtentry_lock_complex = 1
sack = 1
sb_max = 33554432
tcp_ephemeral_high = 65535
tcp_ephemeral_low = 32768
tcp_init_window = 16
tcp_nodelayack = 1
tcp_recvspace = 8388608
tcp_sendspace = 8388608
udp_ephemeral_high = 65535
udp_ephemeral_low = 32768
udp_recvspace = 655360
udp_sendspace = 65536

in addition, you probably want to put this into your /etc/netsvc.conf
hosts=local,bind4
This User Gave Thanks to zxmaus For This Post:
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

FTP connection problem on new server

Solaris Server (V880) version 8 Brand new box just installed O/S, what do I need to do in order to get FTP working. I have updated the /etc/hosts.equiv file Problem - When trying to ftp to the server I get a login incorrect message, this is with the root user. Are there some... (1 Reply)
Discussion started by: miredale
1 Replies

2. UNIX for Dummies Questions & Answers

Network connection problem in unix

I have a network connection problem in unix. I am trying to access to LAN in unix but unfortunately it doesn't work. For example, if I ping from Unix to windows it says 'the network is unreacable'. Also, I can't ping in windows to unix. I would be glad if someone could help me. Thanks. ... (5 Replies)
Discussion started by: fatihshen
5 Replies

3. Cybersecurity

Enable SSH for root over certain network connection of a server...is it possible?

Hi - I have a SUSE Enterprise Linux Server V9 that I have an issue with. Policy says that root connectivity via ssh needs to be disabled. So, to do that, I made the following change in the sshd_config section: # Authentication: #LoginGraceTime 2m #PermitRootLogin yes PermitRootLogin no... (3 Replies)
Discussion started by: cpolikowsky
3 Replies

4. Solaris

Server unexpectedly closed network connection error in passwordless in ssh through

Hi , when i try to passwordless connection login in ssh through putty, i am getting the "Server unexpectedly closed network connection" error.i have already finished the public and private key settings for the particular user. thanks MaroV (1 Reply)
Discussion started by: vr_mari
1 Replies

5. AIX

AIX OS problem? network problem?

Dear ALL. I installed AIX OS on customer sites. but Only one site is too slow when I connected telnet, ftp.. Ping is too fast. but telnet and FTP is not connected.. of course i check the configuration file on aix but it's normal. Do any Idea?? thanks in advance. - Jun - (3 Replies)
Discussion started by: Jeon Jun Seok
3 Replies

6. Solaris

Solaris 10 ftp connection problem (connection refused, connection timed out)

Hi everyone, I am hoping anyone of you could help me in this weird problem we have in 1 of our Solaris 10 servers. Lately, we have been having some ftp problems in this server. Though it can ping any server within the network, it seems that it can only ftp to a select few. For most servers, the... (4 Replies)
Discussion started by: labdakos
4 Replies

7. AIX

Help Me - AIX server connect to a VPN network

Hi, I have a task requested by my boss to create a script to enable a server to connect to a vpn network and then to connect to another server to upload some data... How can I connect to a vpn network from AIX server? via telnet? ssh? I have tried to google but mostly the answers are... (1 Reply)
Discussion started by: mushr00m
1 Replies

8. UNIX for Advanced & Expert Users

fork: Resource temporarily unavailable , server unexpectedly unavailable network connection

Solaris 10 Server refuse to connect :wall: fork: Resource temporarily unavailable , server unexpectedly unavailable network connection , refuse error, disconnect message, fatal error type2, (protocol error type2) Issue has been resolved after taken few steps :b: First of all need to check... (1 Reply)
Discussion started by: taherahmed
1 Replies

9. Ubuntu

ssh connection unstable on remote server

Hi I hope someone can spot what is wrong with this ssh connection as it has me baffled. I am trying to set up a remote ssh connection (passwordless) to a remote 'server', (Ubuntu laptop at home). I have tried these steps with rsa and dsa key types, (currently dsa) - 1) ssh-keygen... (4 Replies)
Discussion started by: steadyonabix
4 Replies

10. AIX

FTP connection refused from text editor while accessing AIX server .

HI , I'm facing the FTP connection refused from text editor while accessing AIX server .It showing the messege "can't create ftp connection connectin refused".Though it is accessible from putty . i'm using aix version 6 . Can any one let me know the seetings needs to be made so that i... (2 Replies)
Discussion started by: rmkganesh
2 Replies
ipa-replica-conncheck(1)					 IPA Manual Pages					  ipa-replica-conncheck(1)

NAME
ipa-replica-conncheck - Check a replica-master network connection before installation SYNOPSIS
ipa-replica-conncheck [OPTION]... DESCRIPTION
When an IPA replica is being installed a network connection between a replica machine and a replicated IPA master machine has to be pre- pared for master-replica communication. In case of a flawed connection the installation may fail with inconvenient error messages. A common connection problem is a misconfigured firewall with closed required port on a replica or master machine. The connection is checked by running a set of tests from both master and replica machines. The program is incorporated to ipa-replica-install(1) but can be also run separately. OPTIONS
REPLICA MACHINE OPTIONS This set of options is used when the connection check is run on a prepared IPA replica machine. -m MASTER, --master=MASTER Remote master machine address -a, --auto-master-check Automatically log in to master machine and execute the master machine part of the connection check. The following options for replica part are only evaluated when this option is set -r REALM, --realm=REALM The Kerberos realm name for the IPA server -k KDC, --kdc=KDC KDC server address. Defaults t MASTER -p PRINCIPAL, --principal=PRINCIPAL Authorized Kerberos principal to use to log in to master machine. Defaults to admin -w PASSWORD, --password=PASSWORD Password for given principal. The password will be prompted interactively when this option is missing MASTER MACHINE OPTIONS This set of options is used when the connection check is run on a master machine against a running ipa-replica-conncheck(1) on a replica machine. -R REPLICA, --replica=REPLICA Remote replica machine address COMMON OPTIONS -c, --check-ca Include in a check also a set of dogtag connection requirements. Only needed when the master was installed with Dogtag 9 or lower. -h HOSTNAME, --hostname=HOSTNAME The hostname of this server (FQDN). By default a nodename from uname(2) is used -d, --debug Print debugging information -q, --quiet Output only errors EXAMPLES
ipa-replica-conncheck -m master.example.com Run a replica machine connection check against a remote master master.example.com. If the connection to the remote master machine is successful the program will switch to listening mode and prompt for running the master machine part. The second part check the con- nection from master to replica. ipa-replica-conncheck -R replica.example.com Run a master machine connection check part. This is either run automatically by replica part of the connection check program (when -a option is set) or manually by the user. A running ipa-replica-conncheck(1) in a listening mode must be already running on a replica machine. ipa-replica-conncheck -m master.example.com -a -r EXAMPLE.COM -w password Run a replica-master connection check. In case of a success switch to listening mode, automatically log to master.example.com in a realm EXAMPLE.COM with a password password and run the second part of the connection check. EXIT STATUS
0 if the connection check was successful 1 if an error occurred SEE ALSO
ipa-replica-install(1) IPA
Jun 2 2011 ipa-replica-conncheck(1)
All times are GMT -4. The time now is 10:34 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy