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Attention: The Cisco Support Community site will be in read only mode on Dec14, 2017 from 12:01am PST to 11:30am for standard maintenance. Sorry for the inconvenience.

New Member

loopback on vlan interfaces

Hi there,

do anyone know about the utility of the "loopback set" flag under the Vlan interface command. Could it help to keep a vlan in up/up state for example?

Thanx.

2 REPLIES

Re: loopback on vlan interfaces

A vlan interface is indeed "virtual". Setting the loopback will have little effect.

A vlan interface will be up/up when there is at least one member port for the vlan with an active link. A single active trunk port will suffice as well to get the interface active.

Regards,

Leo

New Member

Re: loopback on vlan interfaces

Hi Leo,

Thank you for your feedback.

I understand that, but what loopback (under vlan interface) does then? i mean what is the difference/utlity to get "loopback set" mention?

RGDS,

Naz

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