VLan question

Answered Question
Jul 31st, 2007

If a VLAN isn't designated on an interface on a 3550 does it default to VLAN1? I was just checking a 3550 that was programmed a while ago and it has no VLAN assignment on interface 1. Is this normal? There are a total of three VLAN's on this switch.

I have this problem too.
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Correct Answer by Jon Marshall about 9 years 4 months ago

Hi Eric

Vlan 1 is the default vlan that a port will be in if you don't allocate it to a different vlan or you don't make the port a trunk. If theport has been made a trunk the native vlan will still be vlan 1 unless you change it.

It is best practice to create a non-routed vlan to place unused ports in rather than leave them in vlan 1. We use vlan 998 for this at work.

HTH

Jon

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Correct Answer
Jon Marshall Tue, 07/31/2007 - 07:19

Hi Eric

Vlan 1 is the default vlan that a port will be in if you don't allocate it to a different vlan or you don't make the port a trunk. If theport has been made a trunk the native vlan will still be vlan 1 unless you change it.

It is best practice to create a non-routed vlan to place unused ports in rather than leave them in vlan 1. We use vlan 998 for this at work.

HTH

Jon

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