Hi
The first thing I would look at is name resolution. UNIX/Linux systems
(telnet and email especially) both use reverse lookup. If the UNIX/Linux box
can not find a name to go with the IP it will produce the situation you
describe.
As a quick experiment, add a host to the hosts file on the UNIX box you are
telneting to. Then telnet to it from that host, I'll bet the connect is very
fast. You can do the same for POP3/SMTP.
HTH
--
John Hardman CCNP MCSE
""Luis Oliveira"" wrote in message
news:[EMAIL PROTECTED]...
> Fellow Cisco users
>
> This is my first post to the list. I've been watching the list for
messages
> regarding a problem that we have at my company (newspaper business) that's
> probably related to our new network.
>
>
> We have recently changed for a new building and since we are now placed in
> several floors (as opposed to the situation we had before) we have taken
> this opportunity to build a new network infrastructure.
>
> We have a central Cisco Catalyst 6006 with 48 10/100 mbit ports, 2*8 fiber
> optic modules that connect to 5 floors (Cisco 3548 XL and Cisco 3524
> switches) by fiber cable.
>
> We have a relatively large network of 400 machines (80% Macs, 20% PC's)
> divided by VLAN's. We also have 30 or so servers (ranging from Sun Solaris
> running Sybase, to Windows NT 4 and 2000 file servers, Microsoft SQL
> servers, Appleshare File servers, AIX machines running Oracle, etc.
>
> Our machines have fixed IP addresses. We are experimenting a problem when
we
> try to telnet a Unix machine. It takes forever (almost half a minute). The
> same problem with e-mail checking ( 30 seconds to logon on the server).
> Before we had just two subnets. Now we have more (private networks), and
the
> mail server is on a public network (DMZ) separated from us by a firewall.
We
> think that the problem is related with the Ciscos or the implementation of
> the VLAN's. The company that implemented our network (which is a sister
> company of my company) until now as not found a solution to our problem
and
> the mail users, which is everyone is becoming very upset with all this.
> Everything else works fine on the network works fine (copying files,
browse
> the internet, that kind of stuff).
>
> Anyone have seen this kind of trouble before ? Can give some advice or
steps
> to follow to eliminate this ?
>
>
> Sorry for the long post.
>
>
> Thanks
>
>
>
> // luis oliveira
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