From: prateek reddy (prateek.reddyk@gmail.com)
Date: Sat Mar 21 2009 - 08:38:29 ART
Hi,
VTP " Vlan Trunking protocol " jus replicates the Vlan database between
the switches of same domain, and propagates only through trunk links.
Where as DTP " Dynamic Trunking Protocol " places a major role in negoiating
the states of the links like desirable, auto etc.., and plays a key role in
establishing trunks after negoiating.
So it is through DTP the negoiation of trunk link happens.
Instead we can hardcode that with the command "switchport mode trunk" but
still DTP is active. For DTP to stop negoiation we have enter the command "
switchport nonnegotiate " . This will stop DTP.
so, let assume we have SW1 and SW2 has two links b/w each other on ports fa
0/21 & fa 0/22 on both the switches.
*if the configuration is as follows on both interfaces fa 0/21 & fa 0/22 of
SW1 and SW2
switchport trunk encapsulation dot1q
switchport mode trunk
switchport nonegotiate
still fa 0/21 and fa 0/22 will be trunks, and DTP is truned of, on those
links...
even then VTP can propogate from SW1 to SW2 through these trunk links...
so VTP is independent of DTP.*
On Sat, Mar 21, 2009 at 4:14 PM, itsfortarget iwillgetit <
itsfortarget@gmail.com> wrote:
> Dear Experts,
> Please let me know is there any correlation between DTP and VTP. If DTP
> is disabled will |VTP packet propagated among the switches ?
>
>
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-- With Regards, K.V.Madhu Prateek Reddy.Blogs and organic groups at http://www.ccie.net
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