vlans automatically shutdown

Unanswered Question
Mar 10th, 2008


i have 03 vlans configured on cisco 2950 switch (vlan 1 and 02 others), my question is why when i activate 01 of the vlans by "no shutdown" in the interface vlan xxx, the others vlans automatically turn to administrativly shutdown.



I have this problem too.
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Jon Marshall Mon, 03/10/2008 - 09:09

The 2950 is a layer 2 switch only which means yu can only have one L3 vlan interface up at any one time. So you can have multiple L2 vlans on the switch but only 1 "interface vlan x" up.

The L3 vlan interface on a Layer 2 switch is purely used to manage the switch and not for routing between vlans. If you want to be able to have multiple vlan interfaces up at the same time you need a L3 switch eg. 3560/3750/4500/6500.




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