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тАО10-26-2010 08:26 AM
тАО10-26-2010 08:26 AM
ports, vlans and tagging
I have a bunch of different VLANs configured on my switch containing Tagged and Untagged ports.
If we are talking about a VLAN other than the default VLAN, how does tagging the port affect it as opposed to untagging the port? I just cannot wrap my head around this tagging concept, I understand that a VLAN is simply an area that contains broadcasts but the tagging thing has me confused.
Thanks for any help on this.
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тАО10-26-2010 08:57 AM
тАО10-26-2010 08:57 AM
Re: ports, vlans and tagging
You can only have one (or zero) untagged VLANs on an individual link.
It makes more sense when you have multiple switches, because it allows you to carry multiple tagged VLANs between switches using a single physical link.
Normally, end equipment (except maybe phones), is going to expect untagged.
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тАО10-27-2010 12:27 AM
тАО10-27-2010 12:27 AM
Re: ports, vlans and tagging
Let me ask you this: On my switch VLAN1 there are some ports 'tagged' and some 'no untagged' from a terminal session.
When I log into the web interface I get options "auto, tagged, untagged, forbid" I dont see an option for "no untagged". So what is this no untagged option and how do I apply it to a port?
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тАО10-31-2010 01:04 AM
тАО10-31-2010 01:04 AM
Re: ports, vlans and tagging
Vlan 1 is the default vlan.
From scratch all port will be untagged in this Vlan.
If yo add a Vlan, you can put a port untagged in the new vlan. Since a port can be placed just once as untagged in a Vlan this port will be automatically 'no untagged' in Vlan 1.
It's also possible you want a port just to be tagged in a certain Vlan, e.g. uplinks. This port will still be untagged in Vlan 1 after you've configured it tagged. If you want to prevent Vlan 1 to pass on that port you give the 'no untag 'port' command in Vlan 1.
You cannot put a port in 'no untagged' if the port isn't yet configured in any other vlan.
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тАО11-02-2010 04:12 AM
тАО11-02-2010 04:12 AM