Hi Rick, Thanks for taking the time to help out! im pulling out the remaining hairs on my head! :)
I found the missing piece by going over the configuration i was going to send :) (I even pulled out a 2950 i was using as SW3, and replaced it with a 3550... just to make sure...) But if you dont mind, how is the l2protocol-tunnel different from QinQ (other than the packets are double tagged). From my now working topology, all my vlans run STP, CDP just fine... I think im missing the point somewhere along the path.. Thanks again! Kim Rick Mur wrote: > Hi Kim, > > Please see my attached drawing. I configured about the same topology > as you did. Trunk between SW3 and SW4 and access ports to SW1 and SW2. > On those access ports I enabled l2-protocol-tunnel cdp and now SW1 and > SW2 see each other as CDP neighbor over those interfaces. > > Please show me your entire configuration if this doesn't work for you. > Again see attached drawing for more clarification on my topology :-) > > > -- > > Regards, > > Rick Mur > CCIE2 #21946 (R&S / Service Provider) > Sr. Support Engineer – IPexpert, Inc. > URL: http://www.IPexpert.com > > > On Sat, Sep 5, 2009 at 1:39 PM, Kim Pedersen <[email protected] > <mailto:[email protected]>> wrote: > > Hi all, > > I have been reading over > > http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.2_44_se/configuration/guide/swtunnel.html#wp1014851 > 10 times by now, and I am still unsure of the difference. > > I have tried to set up a lab to test some stuff out, it consists of 4 > switches: > > SW3 is connected to SW1 and SW4. > SW4 is connected to SW3 and SW2 > and SW1 and SW2 are connected. > > I want SW3 to see SW4 through SW1 and SW2. To accomplish this, i have > set up a vlan (13) on both SW1 and SW2, then an access port on > each with > vlan 13 is connected to SW3 and SW4 respectively. On top of this, > i use > l2protocol-tunnel on each of these interfaces. I was expecting CDP > traffic to flow from SW3 to SW1, through the trunk between SW1 and > SW2, > and from SW2 to SW4. But this does not happen. > > I think generally im confused between the difference between QinQ > and l2 > protocol tunneling. Can someone shed some light on this or maybe point > me in the correct direction through some documentation apart from the > above Cisco Doc... > > Thanks! > > Sincerely, > Kim Pedersen > > -- > > // Freedom Matters > // Follow my progress on: http://kpjungle.wordpress.com > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, > please visit www.ipexpert.com <http://www.ipexpert.com> > > > > ------------------------------------------------------------------------ > -- // Freedom Matters // Follow my progress on: http://kpjungle.wordpress.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
