> >Good guess, but 2900XLs have fastethernet ports Fast0/1-Fast0/24......
Not all of them have 24 ports, especially if he got an older used one. Who knows why Cisco calls fa0/1 on his particular switch port 13? All I can say is that there's some logic to it and it's something like I said previously. So, I can't find any decent documentation on the 2900XL, especially since he didn't say what model, but at least I can add _some_value to the discussion. The concept to learn is that in addition to having an overall Bridge ID, a bridge also has an ID associated with each port. The Port ID contains a priority field followed by a port number that identifies a physical port on a switch or bridge. The vendor can use any sort of identifying scheme it wants. Radia Perlman semi-ironically jokes that she can't imagine that the Port ID has any use. But Cisco uses it in the configuration of their PVST. Priscilla >Mike W. > >"Priscilla Oppenheimer" wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > I don't know your particular switch, but I bet it has 12 10BaseT ports and > > 2 100BaseT ports. The first 12 are 1-12; the Fast Ethernet ports are 13 >and > > 14. It's something as simple as that and is described in your hand-dandy > > Cisco product documentation. > > > > Priscilla > > > > At 02:58 PM 4/22/02, Tony Chen wrote: > > >Bill, > > > > > >Thanks for the input, but how does int fa0/1 got translated into 13, and >int > > >fa0/2 got translated to 14 and so on. > > > > > >Tony > > > > > > >>> "Bill Carter" 04/22/02 01:27PM >>> > > >I believe 13 is the ifindex number. > > > > > >-----Original Message----- > > >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > > >Tony Chen > > >Sent: Monday, April 22, 2002 11:19 AM > > >To: [EMAIL PROTECTED] > > >Subject: show spanning-tree command and the port number [7:42239] > > > > > > > > >The following is the captured output of command "show spanning-tree >fa0/1" > > >on catalyst 2900XL. > > >What is the relationship between interface fa0/1 and port 13? Where does > > >this number port 13 come from? > > > > > > > > > > > > > > >2900XL#show spanning-tree interface fastEthernet 0/1 > > >Interface Fa0/1 (port 13) in Spanning tree 1 is FORWARDING > > > Port path cost 19, Port priority 128 > > > Designated root has priority 8192, address 0010.0db1.7800 > > > Designated bridge has priority 32768, address 0050.8039.ec40 > > > Designated port is 13, path cost 19 > > > Timers: message age 0, forward delay 0, hold 0 > > > BPDU: sent 2105, received 1 > > > The port is in the portfast mode > > > > > > > > >Tony > > > > > > > > > > > >*********************************************************************** > > >This message is a private communication. If you are not the intended > > >recipient, please do not read, copy, or use it, and do not disclose it > > >to others. Please notify the sender of the delivery error by replying > > >to this message, and then delete it from your system. Thank you. > > > > > > > > >--------------------------------------------------------------------- > > >Visit http://www.ballfoundation.org for our latest news. > > >*********************************************************************** > > >This message is a private communication. If you are not the intended > > >recipient, please do not read, copy, or use it, and do not disclose it > > >to others. Please notify the sender of the delivery error by replying > > >to this message, and then delete it from your system. Thank you. > > > > > > > > >--------------------------------------------------------------------- > > >Visit http://www.ballfoundation.org for our latest news. > > ________________________ > > > > Priscilla Oppenheimer > > http://www.priscilla.com ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42275&t=42239 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
