Hi Ken, But that begs the question, when i state that native vlan should be 250 on a certain trunk, but i dont allow that on the trunk (switchport trunk allow vlan 200), to allow only another vlan (200), how does cdp function? (lab shows that it still finds neighbor devices).
Kim [email protected] wrote: > Hi Kim, > CDP along with VTP & STP was transported by vlan 1. Vlan 1 need not > necessary be the native vlan. > > Kengyong > CCIE #24979 > > >> Hi All, >> >> I have a question regarding the native vlan in dot1q. Frames comming >> from the vlan that is choosen as the native vlan is not tagged across >> the trunk. I can manually set the native vlan to be, say 200. I can then >> also say that i only want to allow vlan 250 to cross the trunk. I was >> under the impression that stuff like CDP used the native vlan across >> trunks, but if it is manually pruned (by not allowing it), why does it >> still work? >> >> Am I wrong in that CDP does not use the native vlan? >> >> What I was trying to do was to follow Cisco's guidelines as to not use >> the native vlan 1. However, since VTP cant prune vlan 1, I was doing it >> manually and came up with this thought... >> >> Hopefully someone can clear it up for me. >> >> 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 >> >> > > -- // Freedom Matters // Follow my progress on: http://kpjungle.wordpress.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
