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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.
Yes, that's absolutely true. When I hear
The link that follows also says VTP domain is one field on DISL and DTP. If
the switches do not agree on the VTP domain and DTP (or DISL) are set to
'negotiate', the trunk will not come up.
www.it.rit.edu/~netsyslb/icsa515/ ExtraResources/VTP.pdf
Thanks to all
Message Posted at:
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.
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
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
Found the answer on the same page.
In desirable mode, DTP packets transfer the VTP domain name (which must
match for a negotiated trunk to come up), plus trunk configuration and admin
status.
Thanks
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7i=64893t=64892
[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.
I doubt that DTP can form a trunk if the VTP domains are different, though
Cisco's documentation
DTP uses protocol type 2004 too, just like DISL. I guess it's just an update
to DISL for use with 802.1Q rather than ISL?
And, I figured out why you might want to tell DTP not to autonegotiate or be
desirable and why in that case no VTP domain name is exchanged and the VTP
domain names don't have
Priscilla Oppenheimer wrote:
DTP uses protocol type 2004 too, just like DISL. I guess it's just an
update
to DISL for use with 802.1Q rather than ISL?
Yes. Step 1: negotiate whether to trunk. Step 2: if the result is yes,
then negotiate which flavor. If both are indifferent, favor ISL.
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
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