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no untagged confusion

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Cameron Stephens
Occasional Contributor

no untagged confusion

Hello, I come from a Cisco background where access ports and trunk ports are fairly straight forward to understand. I am now working at a company with a HP 5406zl which has tagged and untagged ports configured. Unfortunately the confusion lies with some VLANs having ports configured as 'no untagged'.

I havent been able to find any info by searching the forums as all it brings up is people's sample configs. Can anyone explain what this command accomplishes?

Jeff Carrell
Honored Contributor

Re: no untagged confusion

quick info:

cisco speak = procurve (most industry) speak
access port = untagged port
trunk port = tagged port (802.1Q)
etherchannel/FEC = trunk or LACP

now to the answer to your q:

the 'no untagged x' in vlan 1 means that the port has been moved untagged into a different vlan...

at factory defaults, all ports start out untagged in the default vlan - vlan 1...

Cameron Stephens
Occasional Contributor

Re: no untagged confusion

Thanks again Jeff for your help.

Valued Contributor

Re: no untagged confusion

I can also agree with you that the "no untagged" is strange because it is very unlogical.

Default all ports are in VLAN1, like:

untagged a1-a24

Then when you create, say, VLAN2 and move some port there then VLAN2 is:

untagged a10

and what VLAN1 in my opinion SHOULD look like:

untagged a1-a9,a11-a24

This information is "really" complete.

But, which makes it confusing is the "double information" now in VLAN1:

untagged a1-a9,a11-a24
no untagged a10

which means the same, but the second line really has no logical use, but for some reason automaticly included. It is only seen in VLAN1.