P.S. If you lab up the scenario in the VoD see what happens when you don't prune VLAN 10 from the trunk -- The Cat switch connected to Cat1 will go errdisabled due to l2pt-loopguard (or something like that). This happens when that switch receives an l2protocol-tunnel frame on a port that is also configured for l2protocol-tunnel itself.
Then, get rid of the CDP tunneling magic on CAT1 and put VLAN 10 back on the trunk. It will then operate just fine. This is something that took me a long time to wrap my head around as a student. I happened to have been practicing L2-Tunneling and Q-Q one day using the topology I show you in the VoD and ran into this issue. That is why it is there : ) On Mon, Feb 15, 2010 at 5:56 PM, Joe Astorino <[email protected]>wrote: > Yes. exactly. You can't have VLAN 10 on that particular trunk due to the > l2protocol-tunneling configuration on Cat1 > > > On Mon, Feb 15, 2010 at 4:48 PM, Jonathan Charles <[email protected]>wrote: > >> OK, that explains a lot... so, if we ditched the CDP tunnel, we would have >> VLAN 10 inbound to Cat3...? >> >> >> J >> >> >> On Mon, Feb 15, 2010 at 2:57 PM, Joe Astorino <[email protected]>wrote: >> >>> Hey Jonathan! >>> >>> This is a question I get all the time in the live bootcamp. The answer >>> is that the traffic will NOT get into the tunnel in this particular case. >>> In this particular case you can not have both the CDP tunneling between R1 >>> and R2 (l2protocol-tunnel) AND the Q-Q tunnel at the same time. This is >>> because of the restriction discussed. In the real world you'd have to have >>> another redundant path or you'd have to turn off the CDP tunnel between R1 >>> and R2. >>> >>> >>> On Mon, Feb 15, 2010 at 2:03 PM, Jonathan Charles <[email protected]>wrote: >>> >>>> OK, first module, we are shown that VLAN 10 is pruned between CAT1 and 3 >>>> and CAt2 and 4... this is so we don't violate the loop prevention rule.. >>>> >>>> But, if we prune out VLAN 10, how does VLAN 10 traffic get into the >>>> Tunnel? >>>> >>>> What traffic are we tunneling, if not VLAN 10? >>>> >>>> >>>> >>>> Jonathan >>>> >>>> _______________________________________________ >>>> For more information regarding industry leading CCIE Lab training, >>>> please visit www.ipexpert.com >>>> >>>> >>> >>> >>> -- >>> Regards, >>> >>> Joe Astorino CCIE #24347 (R&S) >>> Sr. Technical Instructor - IPexpert >>> Mailto: [email protected] >>> Telephone: +1.810.326.1444 >>> Live Assistance, Please visit: www.ipexpert.com/chat >>> eFax: +1.810.454.0130 >>> >>> IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA >>> (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, Security & >>> Service Provider) Certification Training with locations throughout the >>> United States, Europe and Australia. Be sure to check out our online >>> communities at www.ipexpert.com/communities and our public website at >>> www.ipexpert.com >>> >>> >>> >> > > > -- > Regards, > > Joe Astorino CCIE #24347 (R&S) > Sr. Technical Instructor - IPexpert > Mailto: [email protected] > Telephone: +1.810.326.1444 > Live Assistance, Please visit: www.ipexpert.com/chat > eFax: +1.810.454.0130 > > IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA (R&S, > Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, Security & Service > Provider) Certification Training with locations throughout the United > States, Europe and Australia. Be sure to check out our online communities at > www.ipexpert.com/communities and our public website at www.ipexpert.com > > > -- Regards, Joe Astorino CCIE #24347 (R&S) Sr. Technical Instructor - IPexpert Mailto: [email protected] Telephone: +1.810.326.1444 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, Security & Service Provider) Certification Training with locations throughout the United States, Europe and Australia. Be sure to check out our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com
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