05-04-2007 12:12 AM - edited 03-05-2019 03:51 PM
guys just confuse abt something.....what does the following command means
switch port mode dynamic desirable and some time we put nonogatite......in which scenario we will be using that command and why.....thanks in advance....regards
05-04-2007 12:22 AM
Hi
It is all to do with DTP (Dynamic Trunking protocol). Basically DTP dynamically negotiates trunks between switches.
The desirable setting means if the port at the other end of the link is set to auto or desirable DTP will neogtiate a trunk.
If you use the no-negotiate option then you are in effect turning DTP off on that port.
HTH
Jon
05-04-2007 12:31 AM
Hi,
Here you got it:
Layer 2 Interface Modes
switchport mode access
Puts the interface into permanent nontrunking mode and negotiates to convert the link into a nontrunking link. The interface becomes a nontrunk interface even if the neighboring interface does not change.
switchport mode dynamic desirable
Makes the interface actively attempt to convert the link to a trunking link. The interface becomes a trunk interface if the neighboring interface is set to trunk, desirable, or auto mode.
switchport mode dynamic auto
Makes the interface convert the link to a trunking link if the neighboring interface is set to trunk or desirable mode.
switchport mode trunk
Puts the interface into permanent trunking mode and negotiates to convert the link into a trunking link. The interface becomes a trunk interface even if the neighboring interface does not change.
switchport nonegotiate
Puts the interface into permanent trunking mode but prevents the interface from generating DTP frames. You must configure the neighboring interface manually as a trunk interface to establish a trunking link.
Regards,
Bjornarsb
05-04-2007 01:18 AM
Config t
int Fa 0/1
switchport mode access/trunk
swichport trunk/access vlan2.........
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