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HP switch and vlan

Posted on 2014-04-04
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Last Modified: 2014-04-07
Hi Experts,

can you explain the following for a vlan on a HP switch ?

What is :

tagged mode
untagged mode
forbid mode
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Question by:Eprs_Admin
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6 Comments
 
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by:Don Johnston
Don Johnston earned 2000 total points
ID: 39978158
Tagged means the port can send/receive traffic for multiple VLANs. Before sending, the ethernet frames are "tagged" with the VLAN number so the receiving switch will know what VLAN a particular frame is a member of.

Untagged means the port can only send/receive traffic for one specific VLAN.

Forbid is used in a GVRP environment where VLANs are dynamically added. It prevents a VLAN from being added to a port.  If you're not doing GVRP, then forbid mode is unnecessary.
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by:Eprs_Admin
ID: 39978216
is tagged also a trunk port ?
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Don Johnston earned 2000 total points
ID: 39978259
That depends on which vendor's terminology you're using. :-)

In HP parlance, a "trunk" is two or more links that are aggregated together (what Cisco calls etherchannel).

HP referrers to a link carrying multiple VLANs as a "tagged" or "tagging" port (what Cisco calls a trunk).
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Author Comment

by:Eprs_Admin
ID: 39982218
on my HP series I 4208 I have the same, tagged and untagged....
I need to make a trunk of some ports.
With Cisco this is easy with the trunkport config
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Expert Comment

by:Don Johnston
ID: 39982758
Please post the config and explain which ports and which VLANs we're talking about.
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Author Comment

by:Eprs_Admin
ID: 39982767
I did it without vlan and trunks.
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