VLAN interface doesn't go UP

[s.debenito]

Hi,

I have 2 6513 Catalysts with MSFC and 720 Supervisor each.I have configured Interface GigabitEthernet 1/48 , and interface GigabitEthernet 2/48. Interface Giga1/48 is being used for connecting a single PC. The interface Giga2/48 is being used for connecting both Catalyst.This is Layer 2 only. Ok. Now let's see Layer 3 configuration:

I have defined VLAN1 and VLAN3.The PC is on a port belonging to VLAN1, and Giga2/48 belongs to VLAN3. Interface Giga2/48 is in UP/UP state, but VLAN 3 is not UP/UP anyway. I have tried everything, configuring trunk between the 2 CAtalyst on port Giga2/48, and with no trunk between them...but nothing works. Interface VLAN 3 is always DOWN.

What can I do to solve this problem??

Thanks in advance.

[Prashanth Krishnappa]

Have you created VLAN 3 in the VLAN database? If not create it

enable

config t

vlan 3

exit

If you have paste the output of sh vlan.

[smif101]

Did you enable ip routing on the switch. You cant have two switch virtual interfaces without it enabled. After you put in the ip routing command you might have to do a no shut on vlan 3.