I learned this lesson the hard way a few days ago. Had to drive out to the remote site and change the VTP name back so the trunk would come back up. After consulting CCO (which I probably should have done in the first place) I set all the trunks to nonegotiate on switches I planned to change the VTP domain name. Then I changed the VTP domain names. My users were happier the second time around.
Is there a benefit to DTP? >>> "Priscilla Oppenheimer" 03/11/03 04:00PM >>> Hi Karen, Are you back in the U.S.? Welcome back, if yes! I consider you a guru of campus networking technologies from the answers you give on GroupStudy. Alaerte and I have noticed that with DTP set to negotiate, the VTP domain name is exchanged and if it doesn't match the trunk doesn't form. Have you heard of that? The workaround is to use the trunk or nonegotiate keywords to force interfaces in different domains to trunk. Thanks, Priscilla Karen E Young wrote: > > As long as the native VLAN is the same on both ends so that the > ends of the prospective trunk link can communicate, DTP will be > able to form the trunk. The VTP domain is irrelevant. All DTP > needs is layer 2 connectivity and the desire (on both ends) to > trunk. :-) > > In fact, one of the requirements for a VTP domain to exist is > that trunking must be enabled between the switches. > > In light of this, I would say that VTP is dependent on DTP or > DISL but DTP and DISL are NOT dependent on VTP. > > Hope this helps, > Karen > > *********** REPLY SEPARATOR *********** > > On 3/10/2003 at 12:30 PM [EMAIL PROTECTED] wrote: > > >Is VTP dependent of DTP or is DTP dependent of VTP?. > > > >From the following statement I think DTP can still form a > trunk even if VTP > >domain is different on both switches. But I have read opposite > statements. > >Unfortunatelly I can not test it now. Any thoughts? > > > > "The VTP protocol communicates between switches using an > Ethernet > >destination multicast > > MAC address (01-00-0c-cc-cc-cc) and SNAP HDLC protocol type > Ox2003. > > It does not work over non-trunk ports (VTP is a payload of > ISL or > >802.1Q), > > so messages cannot be sent until DTP has brought the trunk > online." > > > > > >http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a0080094713.shtml Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65124&t=64892 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
