asked on

Trunk issue

I'm trying to create a trunk connection between a 2924 Cisco switch and a 2960. I can set the mode to trunk on the 2960 just fine. I connect the the two switches with a cross-over cable and the connection goes down. The port on the 2924 goes green/yellow. If I leave the port on the 2924 as "mode access" the two switches can see each other but the VLAN database does not update on the 2960.(2924 is the vlan server).

What am I doing wrong?

Thank you!

ASKER CERTIFIED SOLUTION

jjmartineziii

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

SOLUTION

Quori

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Don Johnston

2900XL switches do not support DTP. You will need to manually define and create the trunk on each switch.

switchport trunk encap dot1q
switchport mode trunk

SOLUTION

thesherminator

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

foresthome

ASKER

I tried to do the same thing with two 2900 switches and worked like a charm. I tried with a 3550 switch and I get the same problem as with the 2960.

Here is how I setup the ports on the switches:

3550 Switch

interface FastEthernet0/6
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
duplex full
speed 100

2900 switch

interface FastEthernet0/9
duplex full
speed 100
switchport trunk encapsulation dot1q
switchport mode trunk

Thank you for your help!

Don Johnston

What is the status of the ports with this configuration?

Can you get the link to come up with it configured as access ports?

Please post the output of a "show int f0/6 switchport" and "show int f0/9 switchport".