Trunking question from NOOB GUY

[WIZARD1325]

my trunking doesnt show at all when i do

show int trunk

but when i do show in fa1/0/5 switchport

SW1#show int fa1/0/5 switchport
Name: Fa1/0/5
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: down
Administrative Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 10 (SUPPPORT)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled

any idea what im doing wrong ? also why is operational mode (down) in the book it says it shows up

running 3570 switch with 12.4v

thanks

[johnd2310]

Hi,

Is that interface connected? The interface needs to be connected to something for it to come up as trunk.

Thanks

John

[WIZARD1325]

you know what i am not gonna lie, I was thinking the same stupid freaking thing.

I was just 2 lazy to hook up my second switch in my server rack im such a idiot.

hhahahah.  im going to try it let you know if that did the trick

Thanks!

[WIZARD1325]

ok so that did the trick

but it raised another question

When i put the first switch to (desirable) and the second to (desirable) there was a conflict in the VTP.

My book says that D to D a trunk will be formed.

but when I put one an auto seem to work.

my question is why didnt it work when i put the second switch on Desirable

and i recieved an DTP mismatch error?

[johnd2310]

Hi,

Can you post the port configuration of both switches.

Thanks

John