Hey Raj,
hmmm...Interesting. What does tcpdump or some other sniffer has to say about
this mischief? I have seen these problems with the firewalls/masq devices
that have not been configured properly and tend to slow down the
connections. You must also be seeing that if you telnet to the server you
get a prompt after ages. Is it the case? I know I am asking a wrong guy this
stupid question, but is DNS, etc configured properly? I hope you are not
trying to do any of the LDAP, etc gizmos.
What on the switch side? Have you checked the ports on the switch for any
excessive collisions, giants, runts, etc? Are the ports configured properly?
If it's a 10/100 Mbps switch be sure that it is not configured for
auto-negotiation for the bandwidth and the parameters are same as on the
linux machines and vice-versa. The whole funda of auto-negotiation sucks in
switches because every vendor having it's own standards. Connection goes for
a toss or is disrupted every now and then because of the stupid
auto-negotiation. I have seen this happening between Sun, Compaq and Cisco
boxes.
AFAIK, tcpdump is your best friend and should be able to help you with more
clues on the problem or maybe by confusing you more :-) Or else put up a
sniffer on a switch port...span the port to which the server is connected to
the port sniffer is connected. With the help of span you will be able to see
the same packets that are being sent to the server on the port on which the
sniffer is connected and hence making packets available to you.
Better still...hire me for a "small" fees ;-)
- Gaurav
>-----Original Message-----
>From: Raju Mathur [mailto:[EMAIL PROTECTED]]
>Sent: Tuesday, April 18, 2000 8:11 AM
>To: [EMAIL PROTECTED];
>[EMAIL PROTECTED]
>Subject: [linux-delhi] Network freezes
>
>
>
>
>
>
>Hi,
>
>I'm facing a weird problem with my network. I have three systems (A,
>B and C) connected to each other using a Nortel switch. A is a linux
>box is on a private IP, B is a Linux Masq system (both private and
>public IP's) and C is another Unix box outside the Masq, on a public
>IP.
>
>I can transfer large files between B and C without problems. However,
>whenever I try to copy a large file from any Unix machine to A (using
>FTP, rcp, ssh, whatever), the connection freezes for long periods of
>time. If I use a Winduhs machine instead of A, file transfers go
>through without any problems. Anyone seen this freezing problem with
>a switch earlier? I haven't checked with a hub, but for a number of
>reasons I feel that the problem will disappear with a hub.
>
>Regards,
>
>-- Raju
>
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