OK, here are the specs for that particular switch: Switch#sh ver | incl Soft|65 Cisco IOS Software, s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2(33)SXI3, RELE ASE SOFTWARE (fc2) cisco WS-C6509-E (R7000) processor (revision 1.2) with 458720K/65536K bytes of memory. 65536K bytes of Flash internal SIMM (Sector size 512K).
Tried this on another switch as well, this time a CBS3020-HPQ, same results: Switch2#show snmp mib ifmib ifindex | incl Po Port-channel1: Ifindex = 5001 Port-channel2: Ifindex = 5002 P10-D03-EDGE-SW155#sh spanning-tree int po1 detail Port 56 (Port-channel1) of VLAN0002 is root forwarding (...) Switch2#sh ver | incl Soft|odel Cisco IOS Software, CBS30X0 Software (CBS30X0-LANBASE-M), Version 12.2(37)SE1, RELEASE SOFTWARE (fc1) Model revision number : D0 Model number : WS-CBS3020-HPQ Perhaps the numbers are correlated in a way, in the sense that one derives from the other, however I am only guessing at this point :-p Regards, Atle On Sun, Jun 27, 2010 at 8:23 PM, Marko Milivojevic <[email protected]>wrote: > Hm. Then Cisco needs to update their documentation :-). I stand corrected. > > I doubt they are random numbers. > > What device was this on? > > -- > Marko Milivojevic - CCIE #18427 > Senior Technical Instructor - IPexpert > > YES! We include 400 hours of REAL rack > time with our Blended Learning Solution! > > Mailto: [email protected] > Telephone: +1.810.326.1444 > Fax: +1.810.454.0130 > Web: http://www.ipexpert.com/ > > On Sun, Jun 27, 2010 at 11:14, Atle Ørn Hardarson > <[email protected]> wrote: > > Actually, Marko - I don't think so - I checked that very same port out: > > Switch#show snmp mib ifmib ifindex Po1 > > Interface = Port-channel1, Ifindex = 218 > > Switch#show spanning-tree interface po1 detail > > Port 1665 (Port-channel1) of VLAN0001 is designated forwarding > > (...) > > It's SNMP ifindex is 218, but it's "STP ID" is 1665 - so to me it appears > > that it is some kind of separate identifier exclusive to STP... > > Btw, your audio lessons are great and very helpful, I listen to them > every > > day as a part of the BLS. > > Atle > > > > On Wed, Jun 23, 2010 at 4:43 PM, Marko Milivojevic <[email protected]> > > wrote: > >> > >> Just one minor correction on Tyson's response. Port ID used by STP is > >> derived from SNMP ifindex for that port. > >> > >> -- > >> Marko Milivojevic - CCIE #18427 > >> Senior Technical Instructor - IPexpert > >> > >> YES! We include 400 hours of REAL rack > >> time with our Blended Learning Solution! > >> > >> Mailto: [email protected] > >> Telephone: +1.810.326.1444 > >> Fax: +1.810.454.0130 > >> Web: http://www.ipexpert.com/ > >> > >> On Wed, Jun 23, 2010 at 14:39, Tyson Scott <[email protected]> wrote: > >> > 1 Yes > >> > > >> > 2 Yes > >> > > >> > 3 Total Accumulated Path Cost to the root Bridge > >> > > >> > 4. The number of times SPT has been recalculated on the Path > >> > > >> > 5. A port set to mode dynamic desirable will default to access mode if > >> > no > >> > device negotiates on the remote end yet it is still the recommendation > >> > to > >> > set the mode to access when you know it is connected to end devices. > >> > > >> > > >> > > >> > HTH > >> > > >> > > >> > > >> > Regards, > >> > > >> > > >> > > >> > Tyson Scott - CCIE #13513 R&S, Security, and SP > >> > > >> > Managing Partner / Sr. Instructor - IPexpert, Inc. > >> > > >> > Mailto: [email protected] > >> > > >> > Telephone: +1.810.326.1444, ext. 208 > >> > > >> > Live Assistance, Please visit: www.ipexpert.com/chat > >> > > >> > eFax: +1.810.454.0130 > >> > > >> > > >> > > >> > IPexpert is a premier provider of Self-Study Workbooks, Video on > Demand, > >> > Audio Tools, Online Hardware Rental and Classroom Training for the > Cisco > >> > CCIE (R&S, Voice, Security & Service Provider) certification(s) with > >> > training locations throughout the United States, Europe, South Asia > and > >> > Australia. Be sure to visit our online communities at > >> > www.ipexpert.com/communities and our public website at > www.ipexpert.com > >> > > >> > > >> > > >> > From: [email protected] > >> > [mailto:[email protected]] On Behalf Of Atle Ørn > >> > Hardarson > >> > Sent: Wednesday, June 23, 2010 5:21 AM > >> > To: [email protected] > >> > Subject: [OSL | CCIE_RS] show spanning-tree int xx detail > >> > > >> > > >> > > >> > Hi everyone > >> > > >> > > >> > > >> > Can someone please explain to me so that I understand the following > >> > output > >> > better: > >> > > >> > > >> > > >> > switch# show spanning-tree interface Po1 detail > >> > > >> > > >> > > >> > Port 1665 (Port-channel1) of VLAN0001 is designated forwarding > >> > > >> > Port path cost 3, Port priority 128, Port Identifier 128.1665. > >> > > >> > Designated root has priority 24577, address 0009.12e9.aec0 > >> > > >> > Designated bridge has priority 32769, address 0014.f113.fc00 > >> > > >> > Designated port id is 128.1665, designated path cost 10 > >> > > >> > Timers: message age 0, forward delay 0, hold 0 > >> > > >> > Number of transitions to forwarding state: 16 > >> > > >> > Link type is point-to-point by default > >> > > >> > BPDU: sent 9090982, received 2782 > >> > > >> > > >> > > >> > > >> > > >> > Please find the breakdown of my questions below: > >> > > >> > > >> > > >> > "Port 1665 (Port-channel1) of VLAN0001 is designated forwarding" > >> > > >> > *** Where does the switch get the value of "Port 1665" from? Is this > an > >> > STP > >> > internal identifier of the port? > >> > > >> > > >> > > >> > "Port path cost 3, Port priority 128, Port Identifier 128.1665." > >> > > >> > *** The port path cost and port priority shown here are LOCAL values, > am > >> > I > >> > correct in this assumption? There are no cumulative values represented > >> > here. > >> > > >> > > >> > > >> > "Designated port id is 128.1665, designated path cost 10" > >> > > >> > *** The designated port ID is the REMOTE value sent from the > neighboring > >> > switch, but *what* is the "designated path cost" and how is it > >> > calculated? > >> > > >> > *** Is the designated path cost the same as the "root path cost"? > >> > > >> > > >> > > >> > "Number of transitions to forwarding state: 16" > >> > > >> > *** What exactly does this mean? I used to think that this number > >> > represented the classic STP states, but a value of 16 has me confused. > >> > What > >> > states are they referring to here? > >> > > >> > > >> > > >> > "Link type is point-to-point by default" > >> > > >> > *** In Cisco's CCIE official study guide, it is recommended that a > port > >> > channel is configured with the "spanning-tree link-type > point-to-point" > >> > command, in order to facilitate a quick connection, but is it really > >> > necessary to hard-code this command on the interface, as it is > obviously > >> > the > >> > default link-type on etherchannel? A bit confusing > >> > > >> > > >> > > >> > Thanks! > >> > > >> > > >> > > >> > Atle > >> > > >> > _______________________________________________ > >> > For more information regarding industry leading CCIE Lab training, > >> > please > >> > visit www.ipexpert.com > >> > > >> > > > > > >
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
