Yes, I'm back. For now. I may be heading back to Amsterdam next month though. I hate looonnnggg flights. Boring.
I had heard of the "negotiate" thing. However, I've had problems with that in the past. Kind of like using "auto" on a 10/100 port. Doesn't always work. Even when the config is perfect and both ends are in the same domain it may fail to establish the trunk, especially between a router and a switch. I usually end up idiotproofing it by forcing it to trunk. Unfortunately, that would have its own problems if trunking happens to go down anyway. Keeps you from accessing the switch remotely and you have to be connected either to a console poret or to a port configured with the same VLAN as the switch's management interface. Good thing that hasn't ever happened to me (so far). :-) *********** REPLY SEPARATOR *********** On 3/12/2003 at 12:00 AM Priscilla Oppenheimer wrote: >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=65125&t=64892 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
