LinuxQuestions.org
Register a domain and help support LQ
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking
User Name
Password
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

Notices

Reply
 
Search this Thread
Old 01-02-2006, 09:26 PM   #1
doctorcisco
Member
 
Registered: Nov 2003
Posts: 70

Rep: Reputation: 17
Dropped/hung TCP sessions on both NIC's, Compaq server with Debian


I'm running Debian unstable on an old Compaq dual proc P3 Proliant server box. I'm using the stock Debian SMP 2.6.something kernel.

Issue: Both the built-in 10/100 NIC (intel chipset I believe) and the second (PCI) NIC (3Com 3C9xx) are behaving badly. It's really odd.

1) Boot server.
2) Ping works to both NIC's.
3) SSH to box.
4) SSH connects and stays connected. But if you put in a command that lists more than about 1 line of text, the ssh session hangs ... does not drop, but will progress at about 1 line of output a minute if that.
5) Fresh ssh to the box will log in ... same behavior.
6) Continuous ping to the box does not drop a single packet during all this.
7) Have tried 2 known good cables, 3 known good ethernet switches.

The box worked fine when I did a netinstall on my home network (the server is at a parochial school.) The issue may have been going on for quite some time ... today I was over there to image some PC's and get the server into production; that's when I discovered the issue.

The issue as I saw it earlier today; samba connections to a share with the PC Ghost images would work for 3-15 minutes, then just stop. Rebooting the server would allow new connections to work (until those too failed). ifdown/ifup would NOT fix it ... only a reboot. When in failure mode, the box could not ping anything outside itself, but reported both interfaces up and running, and ifdown/ifup would result in a message saying that autonegotiation had succeeded.

Since ssh is useless for practical purposes, I'm looking for ideas/things to try/commands to run to help diagnose the issue. I'm not at all deep on Linux, but am a Cisco network guy and know my way around hardware etc. quite well.

Please help!

Thanks,
doctorcisco
 
Old 01-16-2006, 08:16 AM   #2
tiermat
LQ Newbie
 
Registered: Jan 2006
Distribution: Fedora Core 3 & 4, SLES 8 & 9 at work
Posts: 22

Rep: Reputation: 15
What happens if you pull the cable from one of the cards and ifdown it?

Are both cards on the same subnet?

What routing rules do you have in place?
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
SATA Raid 1 Intel Server Board Hung on heavy disk i/o ncc2004 Linux - General 6 06-24-2005 02:03 AM
I'm having problems installing Debian on a Compaq Proliant 8000 Server DCPAQ2 Linux - Newbie 3 03-02-2004 10:44 AM
Installing Debian on a Compaq Proliant 8000 Server DCPAQ2 Linux - Newbie 0 02-27-2004 09:04 PM
Ntop with 2 nic's on Debian + basic questions! bazagee Debian 2 02-19-2004 09:56 PM
limiting concurrent TCP sessions from a single IP n3tw0rk Linux - Security 2 12-31-2003 06:56 AM


All times are GMT -5. The time now is 08:25 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration