Just curious - are you using real switches, or Dynamips? -- Marko Milivojevic - CCIE #18427 Senior Technical Instructor - IPexpert
FREE CCIE training: http://bit.ly/vLecture Mailto: [email protected] Telephone: +1.810.326.1444 Web: http://www.ipexpert.com/ On Mon, Oct 18, 2010 at 19:29, Baldwin, Patrick A. <[email protected]> wrote: > Thanks for the reply Jay, CAT4 is the root per task 3.5. With CAT4 as the > root, I am not sure why this should not work as is. > > > > Patrick A. Baldwin (Alex) > Network Engineering > Colsa Corp., HOSC Contract > NASA , Marshall Space Flight Center > (Office: (256) 544-2089 > ÊFax: (256) 544-8629 > *E-mail: [email protected] > > > > From: Jay Taylor [mailto:[email protected]] > Sent: Monday, October 18, 2010 2:20 PM > To: Baldwin, Patrick A. > Cc: [email protected] > Subject: Re: [OSL | CCIE_RS] Volume 1 Task 3.8 > > > > If I remember correctly it depends on which switch ends up being the root in > your topology. In at least 1 config of that lab I added the following on > Cat2 to make things work as expected: > > int ra fa0/21-22 > span mst 0 cost 100000 > > > > On Mon, Oct 18, 2010 at 2:53 PM, Baldwin, Patrick A. <[email protected]> > wrote: > > Afternoon, > > > > Performing Task 3.8 of Volume 1, I cannot duplicate the results in the DSG > > > > If the links between Cat1 and Cat4 fail, the backup path should be the > highest port number to cat3. if this link fails, the highest port number to > cat2 should come next in line. if changes are made on cat1, cat1 is only > allowed one interface command. > > > > This task is to teach us to use the port-priority command to manipulate > spanning-tree, once all interfaces have a cost of 200000, manipulating the > port priority on cat2 port f1/0/24 in my case should cause that port to be > used by cat1. > > > > > > Cat2-MST(config-if)# spanning-tree mst 0 port-priority 64 > > Cat2-MST(config-if)#^Z > > Cat2-MST#sh span > > 1d17h: %SYS-5-CONFIG_I: Configured from console by console > > Cat2-MST#sh span int f1/0/24 > > > > Mst Instance Role Sts Cost Prio.Nbr Type > > ------------------- ---- --- --------- -------- > -------------------------------- > > MST0 Desg FWD 200000 64.26 P2p > > > > > > Cat1-MST(config-if-range)#do sh span > > > > MST0 > > Spanning tree enabled protocol mstp > > Root ID Priority 24576 > > Address 001a.a1fc.dc00 > > Cost 0 > > Port 23 (FastEthernet1/0/21) > > Hello Time 3 sec Max Age 15 sec Forward Delay 15 sec > > > > Bridge ID Priority 32768 (priority 32768 sys-id-ext 0) > > Address 001b.2bde.c000 > > Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec > > > > Interface Role Sts Cost Prio.Nbr Type > > ------------------- ---- --- --------- -------- > -------------------------------- > > Fa1/0/1 Desg FWD 200000 128.3 P2p > > Fa1/0/2 Desg FWD 200000 128.4 P2p > > Fa1/0/4 Desg FWD 200000 128.6 P2p > > Fa1/0/5 Desg FWD 200000 128.7 P2p > > Fa1/0/11 Desg FWD 200000 128.13 P2p > > Fa1/0/13 Desg FWD 200000 128.15 P2p > > Fa1/0/14 Desg FWD 200000 128.16 P2p > > Fa1/0/15 Desg FWD 200000 128.17 P2p > > Fa1/0/16 Desg FWD 200000 128.18 P2p > > Fa1/0/18 Desg FWD 200000 128.20 P2p > > Fa1/0/21 Root FWD 200000 128.23 P2p > > Fa1/0/23 Altn BLK 200000 128.25 P2p > > Fa1/0/24 Altn BLK 200000 128.26 P2p > > > > Port f1/0/24 should be Root FWD, but is still blocking?? Any idea what I > did wrong or is this a bug? I have verified with CDP that CAT1 and CAT2 are > connected on f1/0/24. > > > > > > Patrick A. Baldwin (Alex) > Network Engineering > Colsa Corp., HOSC Contract > NASA , Marshall Space Flight Center > (Office: (256) 544-2089 > ÊFax: (256) 544-8629 > *E-mail: [email protected] > > > > _______________________________________________ > 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 > > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
