From: Anthony Sequeira (terry.francona@gmail.com)
Date: Sun May 22 2005 - 10:26:55 GMT-3
You can indeed use the switchport nonegotiate command in conjunction
with switchport mode access. Here is the show int switchport output
that results as well as a look at the configuration on the port.
Notice that negotiation of trunking is no longer operational! Kind of
interesting since you have told the port that it can NEVER be a trunk
anyways!
So in summation - it looks like if you want to prevent DTP activities
on a port - use switchport nonegotiate.
NOTE: You cannot use the switchport nonegotiate command in conjunction
with switchport dynamic - and this should make perfect sense! The
switch gets a bit confused when you say - let's use DTP - AND let's
NOT use DTP!
show run int gi0/9
Building configuration...
Current configuration : 99 bytes
!
interface GigabitEthernet0/9
switchport mode access
switchport nonegotiate
no ip address
end
Rack1SW1#show int gi0/9 switch
Name: Gi0/9
Switchport: Enabled
Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: negotiate
Operational Trunking Encapsulation: native
Negotiation of Trunking: Off
...
On 5/21/05, B Kim <beokim@comcast.net> wrote:
> Hi,
>
> I think that even in access mode, DTP is running unless it is explicitly
> disabled. Hope someone can verify this, if incorrect.
>
> BKim
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Wang, Ting (Taylor)
> Sent: Saturday, May 21, 2005 9:02 PM
> To: ccielab@groupstudy.com
> Subject: RE: DTP
>
> Hi ,
> I 'm not sure if only use " sw mode access" can work. In access mode,
> how will DTP work?
> Taylor
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of B
> Kim
> Sent: 2005?5?22? 7:51
> To: sumit.kumar@comcast.net; ccielab@groupstudy.com
> Subject: RE: DTP
>
>
> Hi
>
> As far as I know, the "switch nonegotiate" is the only way to disable
> DTP between switch ports.
>
> Rgds.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> sumit.kumar@comcast.net
> Sent: Saturday, May 21, 2005 6:32 PM
> To: ccielab@groupstudy.com
> Subject: DTP
>
> Mates,
>
> I have seen a lot of threads on this but for final verification to -
> Disable DTP completely on the switch - the best bet is to use
> "switchport nonnegotiate " on all trunk ports or there's any othr way of
> doing it?
>
> thanks !!
>
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