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How Can I Make My Vlan Up?

How Can I Make My Vlan Up?

I added a Vlan to my 5509 Switch,
but the vlan status is always as "vlan is down, line protocol is down" ?
How can I do to make it up?


RE: How Can I Make My Vlan Up?

A VLAN interface is defaulted in the *down* condition. You need to go though the global config ( config t), then change to the vlan interface.. then type in *no shutdown* and it should come up assuming everything else is correct.


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RE: How Can I Make My Vlan Up?

The vlan is "down", but not "administratively down", so I can not up it just by typing "no shut".

I think there must be some configuration mistake, but how can I discover it?

RE: How Can I Make My Vlan Up?

The vlan configuration is :
interface Vlan99
 ip address
 ip verify unicast reverse-path
 no ip redirects
 mls rp vtp-domain dm
 mls rp ip

the result of "ping" is :
Success rate is 0 percent (0/5)

Can you tell me where the configuration mistake exist?

RE: How Can I Make My Vlan Up?

by all accounts you haven't configured a vlan yet....
What IOS are you using?
can you post you're full config to help?

RE: How Can I Make My Vlan Up?

Thanks for your help.
I made a stipud mistake.
I connected 10M port assigned to that vlan to a 100M port, so they can not connected, and the vlan can not "up".

RE: How Can I Make My Vlan Up?

Ha!!  dont think its all that stupid.. we ALL have done  worse things   At least you found it and corrected it.

Have fun!


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