Turning on portfast on a port with more than one host connected via a hub
will cause no problems with loops. The Hub is solely a layer one
connecting device so it is impossible for it to cause STP problems. If you
had a switch or a bridge connected to that port then you would have a
problem, but a hub would be fine.
At 03:12 PM 12/11/00 -0600, you wrote:
>This bears clarification...
>
>The port immediately goes into a forwarding state, bypassing the listening
>and learning states. However, it will learn the stations MAC address
>immediately
>on the first packet that the station sends. You say "at a later time" and I
>think
>that is a little misleading. Also, it should be noted that this should only
>be used when the switch port is connected to ONE host. If portfast is
>enabled on
>a port connecting to more than one host (i.e.- a hub with multiple servers)
>then switch
>loops will likely be the result.
>
>Roman
>
>-----Original Message-----
>From: Roan, Wayne [mailto:[EMAIL PROTECTED]]
>Sent: Monday, December 11, 2000 12:41 PM
>To: '[EMAIL PROTECTED]'
>Subject: RE: cisco 3524 XL EN problem
>
>
>You may need to enable portfast access. This will allow the computer to
>transmit data immediately and the switch will learn the MAC address at a
>later time. It will however broadcast data coming to your port on all ports
>it does not know the MAC address for until it learns your computer's MAC
>address.
>
>-----Original Message-----
>From: atif [mailto:[EMAIL PROTECTED]]
>Sent: Monday, December 11, 2000 9:14 AM
>To: cisco group study
>Subject: cisco 3524 XL EN problem
>Importance: High
>
>
>i have installed a cisco 3524 xl en switch, i am facing a weird kind of =
>problem i hope u guys will help me solve this problem.
>the problem is that when a pc is connecte to switch for the 1st time it =
>takes about 4 to 5 minutes for the switch to communicate with the =
>machine.The led on both sides shows green light even when its not =
>communicationg and the ping request is timed out.
>then after that it takes about 1 minute for computer to see the switch =
>if we take the connecter out of the switch and inserts again.
>now todays it happened that after the weekend when computers were =
>started some were communicating and many were not and all leds were =
>showing green lights and after one hour or so every thing was =
>normalized.
>i havent seen this sort of problem before, this switch at the moment is =
>running at default configuration and connected to a router to a vsat =
>link.
>i havent assigned ip add info so far , can this be a problem( i dont =
>think so).=20
>can any body figure it out what is the problem,
>is something wrong with cabling,switch or NIC.
>
>atif
>
>
>_________________________________
>FAQ, list archives, and subscription info:
>http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
>_________________________________
>FAQ, list archives, and subscription info:
>http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
>_________________________________
>FAQ, list archives, and subscription info:
>http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
