How to bring interface vlan up?

[Lotfi BOUCHERIT]

Hello,

We have about 10 cisco switches (c2960) connected to a distribution switch (l3 switch 3650). And we defined vlan 50 to be our management vlan of cisco materials.

I recently found that not all of the switches are manageable through the management interface. And discovered that in those switches facing that problem, that vlan 50 status is down and line protocol is down.

I would like to know how we can bring that interface up?

Thank you.

[luis_cordova]

Hi @Lotfi BOUCHERIT,

Could you share the configuration of the vlan 50 interface and the trunk interface that connects switches L2 and L3?

Regards

[Julio E. Moisa]

Hi

I assume the interface vlan 50 is down down, 

Well have you verified if the vlan 50 is created on the switches and also if the vlan is passing through the trunk interfaces?

You could  be filtering the vlans through the trunks so you must add it in order to enable the SVI 50.

switchport trunk allowed vlan add 50

Hope it is useful

:-)

[Mike.Cifelli]

You must have a host directly connected to your switch sitting in that vlan, or the vlan active on your trunk uplink. Also, verify that your vlan is in your vlan DB.
On your access switchport it would look like:
switchport mode access
switchport access vlan ##
<with other desired commands>
On your trunk swtichport it would look like:
switchport mode trunk
switchport trunk allow vlan add ###
<with other desired commands>

HTH!

[paul driver]

Hello

1) an interface is allocated to the vlan

2) it’s part of a trunk

3) the vlan is active and not suspended or shutdown