This is a very interesting issue that must have a work around,
specially when moving workstation/servers to other locations.
Sure, one server is ok, what about moving a whole department
from one Cat5000 to another ? or if you schedule Station moves
on a weekly basis ? Do you want to clear cam all the time ?
I don't think so !-:) Maybe Cisco has some answers to these type of
scenarios.
In the server scenario I would instead of "Clear cam dyn ", issue
a "clear cam Mac_Address Vlan#"" for that server if is going to a different
port on the same switch, this way the switch will not have to rebuild the
MAC table.
------Original Message------
From: "Roberta J. Flinn" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Sent: July 6, 2000 6:43:42 PM GMT
Subject: Fw: Easy Brain Teaser (Switching)
This has to do with the learning (cam table) in the switch. The entries are
set to age out of that table after a preset number of minutes. Until the
older entry "ages out" the switch will see the same MAC address on two
different ports. It cannot make a switching decision so it does not send to
either port. To solve this issue - you can issue a "clear cam dynamic"
command. This will flush the CAM table and force the switch to rebuild it
with the correct information. (Note: can cause additional traffic for a few
moments because the switch will flood packets destined for unknown MAC
addresses out all ports except the one from which it received the packet.)
Roberta J. Flinn
CCDP, CCNA, MCNE, MCSE
----- Original Message -----
From: "John Neiberger" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, July 06, 2000 8:04 AM
Subject: Easy Brain Teaser (Switching)
> Here's an easy one, because I'm nicer than Chuck. :-) Even though it's
> easy, it's still practical. And for those of you who immediately know the
> answer, let the less experienced people mull this one over for a bit.
>
> You have a Catalyst 5000 with several servers connected and you've decided
> to rearrange the port assignments. You disconnect one server in
> particular
> > and move it to another port, then quickly discover that it now has no
> > network connectivity. You attempt to access the network for a couple of
> > minutes to no avail. In supreme frustration, you head to the break room
> for
> > coffee and donuts.
> >
> > When you come back several minutes later you find that the server now
has
> > network connectivity and all is well, no problems.
> >
> > What is the most likely cause of this behavior and what could you have
> done
> > to remedy the situation immediately?
> >
> > Good luck!
> >
> > John
> >
> >
> >
> >
> >
> > _______________________________________________________
> > Say Bye to Slow Internet!
> > http://www.home.com/xinbox/signup.html
> >
> > ___________________________________
> > UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
> > FAQ, list archives, and subscription info: http://www.groupstudy.com
> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
>
___________________________________
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Jorge Rodriguez /CCNA
Network Analyst
R&S Networks Inc
1112 Boylston Street
Suite 222
Boston, MA 02115
1-781-614-1294
http://www.netwire.n3.net/
http://www.learncisco.n3.net/
........................................................
iWon.com http://www.iwon.com why wouldn't you?
........................................................
___________________________________
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
