I have seen this happen on a 3500xl 12 port, and 48 Catalyst Switch.
I have created vlan10, assigned an ip add to int vlan 10 and vlan 10 is showing up---up, with no connection to any of the ports."Not right"
On this same switch I had an ip add assigned to vlan 1, and ports assigned to vlan 1 as well. When I tried to create another Vlan, and do a no shut. The vlan remains in the administrative down status.
On another switch(3500-48-xl), with vlan 1 assigned an IP add, and ports assigned to vlan 1. I created vlan 20, assigned an IP add, assigned some ports to vlan 20. The vlan20 is showing administrative down, after a no shut.
Also when I do a no shut on vlan1, and show run. Vlan 1 is still in shutdown mode. But sh ip int brief, says it is up --- down.
This does not make sense, and I have seen this problem at a customer site as well on a 3500-xl. Is there a BUG out there. I have the c3500xl-c3h2s-mz.120-5.WC9.bin as the ios
you can only have one active management vlan on the switch, this usually is VLAN1. As stated earlier, if you want VLAN 20 to be the management vlan, then you have to assign the ´management´ command to this vlan. You still can assign the ports to different vlans with the command ´switchport access vlan x´:
switchport access vlan 2
would be an example.
Since this is not a Layer 3 device, you cannot create vlan interfaces capable of routing traffic on the 3500XL switch.
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