On Wednesday, September 18, 2002, at 06:00 , Jason Hunt wrote:

> On Tue, 17 Sep 2002, Bob Bomar wrote:
>
>> I have a dual P-200 file server that is haveing some connection
>> problems.  When I ssh to the box, I login in fine, but some times
>> it lags for a while, but the two boxes are physically sitting next
>> to each other, and are on ports that are side by side on the
>> switch.  While I ssh out of the box from the console, to another
>> box on the LAN, it is still intermitant.  Any body have any ideas?
>>
>
> This is just a stab in the dark, but could it be DNS?
>
Personal experience has shown this to be the usual culprit of ssh lag 
(whereby a server cannot reverse lookup the IP and waits until the 
timeout period has lapsed).  But if you are talking about lag after the 
password has been accepted, etc, then it is almost certainly a network 
problem (NIC, Switch/hub, netmask settings wrong, cable, RF from a 
florescent light) - I had dealt with this a lot over a wireless 
connection where I wasn't monitoring the signal strength and found that 
as the signal dropped, so did my lag (and quite significantly).  So, I 
would imaging the same thing would be true of a wired network if there 
are physical problems.  The usual suspects are cable and hub...  at 
least in my experience - even when I was so sure that it wasn't that I 
wasted two days on a network problem only to find out that the switch 
port was slowly going bad...
If you have any extra equipment (or money) try different NIC's 
completely, different cables (that shouldn't be difficult since they are 
so close to one another) and also a different hub.  Also, while you are 
ssh'ing, try pinging the server from the client in a separate window or 
terminal and see if you ever get "stoppage" - if you do, it almost 
surely is a network problem.

HTH,
Steve


To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-questions" in the body of the message

Reply via email to