Bring Vlan up without host

Apr 05, 2006 4 Replies
K

I have Vlan 10 coming over a trunk from a provider for a point-to-point circuit and I have configured Vlan 10 on my 3560 switch. I put an ip address on this Vlan but the Vlan line protocol won't come up until a host in plugged into another port assigned to Vlan 10.



Is there a way to configure a virtual interface in the switch that will bring the Vlan protocol online?



My other idea was to make a loop cable and plug it into an interface assigned to Vlan 10 just to bring the Vlan online.



Ideas?



Thanks for the help,



Kevin



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M

AFAIK this is the way autostate works on vlan interfaces

se

formatting link

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K

I tested out making another port on the 3560 a L3 port and plugged that port into the L2 vlan switchport and the Vlan came up. Not really sure if this is a good idea though.

3560 Port 14 L3 3560 Port 15 L2 associated with Vlan 10

Kevin

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M

Assuming you have no IP address configured on L3 port ...

Disable CDP on L3 port if enabled.

Check that no packet are being sent on the L3 port

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A

What happens if you do no keepalive on the L2 interface and dissable STP on the VLAN?

You could consider adding the VLAN to a trunk that did not go anywhere.

I see absolutely nothing wrong with using two ports and connecting them with a crossover or a loopback connector. Either will do no harm to the network.

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