[c-nsp] Forcing VLAN interface to UP state

[David Granzer]

Hello,

I'm not surre how it works on UC520, but with 3750 (for example) when
you don't have a spanning tree instance for that vlan then the
interface state is up/down.

3750-1#sh spanning-tree vlan 24
Spanning tree instance(s) for vlan 24 does not exist.

3750-1#sh int vlan 24 | i Vlan
Vlan24 is up, line protocol is down

When enabling spanning tree

3750-1#sh spanning-tree vlan 24

VLAN0024
  Spanning tree enabled protocol ieee

3750-1#sh int vlan 24 | i Vlan|Internet address
Vlan24 is up, line protocol is up
  Internet address is 1.2.3.4/24

3750-1#ping 1.2.3.4

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5)


Regards,
David



On 10/1/08, Bagosi Rómeó <Bagosi.Romeo at iqsys.hu> wrote:
> Hi,
>
>  Is there a way to force a VLAN interface (ex.: interface vlan 400) to UP/UP state on a Cisco UC520 (router, switch...), WITHOUT connecting a device to a port which is in the mentioned VLAN?
>
>  The current configuration is:
>  int vlan 400
>   ip address 10.1.1.1 255.255.255.0
>
>  show int vlan 400
>   Vlan300 is up, line protocol is down
>  ...
>
>  Thanks,
>  Romeo Bagosi
>
>  _______________________________________________
>  cisco-nsp mailing list  cisco-nsp at puck.nether.net
>  https://puck.nether.net/mailman/listinfo/cisco-nsp
>  archive at http://puck.nether.net/pipermail/cisco-nsp/
>