Luis, This is a tough tough lab. What you have to do is really sit down and look HARD at your diagram. Make sure you have a good L2 only diagram for this lab. You need to figure out where the loop is coming from. You do that by looking at your diagram, finding all the possible loops and making sure spanning-tree is taking care of them where necessary.
One thing to look out for is to make sure the VLAN you use to tunnel are not being forwarded over any trunks ...only where you need them. When a port goes err-disable due to a loop that should give you a clue ...the port that goes down is the port where the frame is looping back in.... so for instance if fa0/19 goes down due to loop, check out that port on your diagram and you should be able to find out what is going on there. I know this is not terribly specific -- it's a hard lab to troubleshoot over email. Let me know if you need any more specific help. Try and explain your specific situation with a bit more detail. On Wed, Jul 15, 2009 at 2:30 PM, Luis Isselin <[email protected]> wrote: > I am trying to finish lab 5.. I started getting loops when I figured out > that I had no blocking paths on my topology. I found out (after cleaning my > config) that with "show spann vlan 100 det" I noticed that my the links > being tunneled (even before setting up the port channels) have some BPDUs > Sent.. but almost ZERO received. > > I guess this is causing my topology to start getting loops. > > I need to have this working before moving on to the port channels (it > doesn't work well either) > > Can anyone help please ? > > Regards, > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > -- Regards, Joe Astorino - CCIE #24347 R&S Technical Instructor - IPexpert, Inc. Cell: +1.586.212.6107 Fax: +1.810.454.0130 Mailto: [email protected]
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
