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Old 03-01-2010, 11:57 PM   #1
gshivamca@gmail.com
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Registered: Feb 2010
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network problem in redhat 4


Dear gurus

iam new on linux environment.. in one of our clinet's working environment, they are using redhat 4 server . nearly 60 client machines are connected with this server. some times network disconnected automatically. if we restart rhe server it automatically starts to work. again 2 or 3 days , the same senario is happening. on this server 2 database is running, it makes lot of problem to us.

what will be the problem ??

is any connection parameter is there ? (ie i mean only 50 numbers of client connection is only allowed like.) or any problem in NIC card or NIC driver.. please help me as soon as possible

with thanks and regards
sivakumar.G
 
Old 03-02-2010, 02:25 AM   #2
vinaytp
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Location: Bengaluru, India
Distribution: RHEL 5.4, 6.0, Ubuntu 10.04
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Dear gshivamca@gmail.com,

Could you please describe your problem with more clarity. More people can help you in solving your problem.

Which is the server/client ?
Which server are you restarting ?
Are you just restarting your newtwork servcice OR whole OS ?
How your server is being accessed (SSH,telnet,VNC) ?

Quote:
please help me as soon as possible
How to help as soon as possible, If the problem description is not clear ?

Also paste the error messages you are getting.

Last edited by vinaytp; 03-02-2010 at 02:28 AM.
 
Old 03-02-2010, 07:02 AM   #3
gshivamca@gmail.com
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Registered: Feb 2010
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Quote:
Originally Posted by vinaytp View Post
Dear gshivamca@gmail.com,

Could you please describe your problem with more clarity. More people can help you in solving your problem.

Which is the server/client ?
Which server are you restarting ?
Are you just restarting your newtwork servcice OR whole OS ?
How your server is being accessed (SSH,telnet,VNC) ?



How to help as soon as possible, If the problem description is not clear ?

Also paste the error messages you are getting.

hai,

1)it is a network. 1 redhat 4 enterprise server connected with nearly 60 windos clients PCs.

2) iam not restarting network service , iam restarting the OS.( i mean iam restarting the redhat 4 server) if i do so, it is working.. but the same problem is coming again....
 
Old 03-02-2010, 09:22 AM   #4
vinaytp
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Registered: Apr 2009
Location: Bengaluru, India
Distribution: RHEL 5.4, 6.0, Ubuntu 10.04
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Fine gshivamca@gmail.com,

Quote:
How your server is being accessed (SSH,telnet,VNC) ?
Still No answer for above question.

So I assume you are using ssh to connect to your RHEL 4 server from Client machines. Please specify if you are using any other means.

Does the connection is disconnected from all the client machines ? OR from few machines ?

There is a parameter in /etc/ssh/sshd_config which controls number of users
Code:
# ClientAliveInterval 0
# ClientAliveCountMax 3
As shown above in my machine both are commented out. If the above parameters are enabled, then it will not allow no more than 3 users.

Also Idle time is monitored by First parameter ClientAliveInterval

Please provide addtional iformation, If the problem still peresists.

when the connection will be lost from Client machines ?
Does the connection terminate from all Client machines ?

Last edited by vinaytp; 03-02-2010 at 09:29 AM.
 
Old 03-02-2010, 09:56 AM   #5
TB0ne
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Quote:
Originally Posted by gshivamca@gmail.com View Post
Dear gurus

iam new on linux environment.. in one of our clinet's working environment, they are using redhat 4 server . nearly 60 client machines are connected with this server. some times network disconnected automatically. if we restart rhe server it automatically starts to work. again 2 or 3 days , the same senario is happening. on this server 2 database is running, it makes lot of problem to us.

what will be the problem ??

is any connection parameter is there ? (ie i mean only 50 numbers of client connection is only allowed like.) or any problem in NIC card or NIC driver.. please help me as soon as possible

with thanks and regards
sivakumar.G
If it works for 2 or 3 days, then it's not a number-of-ssh client problem, since everyone would be fully WORKING for those days. You say it has a database on it...what kind of database?? What is the networking environment like on the box? One NIC or 2? Have you checked the cables, router, port, etc., going to the server?

And have you tried just doing a network-restart? Have you looked at the log files? What diagnostics have you done? You've given a very vague description of a problem, but no real information. And if someone has hired you to fix this, you don't seem to have the necessary troubleshooting knowledge.
 
  


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