HP Switch – ‘No Untagged Port’ Error

This all comes about because different vendors often choose to use different terminology or in some cases the same terminology for different concepts.

What Cisco calls a trunk port is also known as a tagged port by certain other vendors. This means that 802.1Q headers are inserted on all of the traffic for the tagged VLANs.

What Cisco calls an access port would then equate to an untagged port. Not to confuse the issue, but a tagged port generally will have zero or one untagged VLAN assigned to it as well. An untagged port is more specifically one on which no traffic is 802.1Q tagged.

In some environments (Solaris, some HP switches, etc), a trunk is used to refer to link aggregation, or what Cisco calls etherchannel. So sometimes to avoid confusion, tagged port may be preferred by some people.

imagine you want to seperate ipv4 and ipv6 traffic with different vlans,

you could use protocol based vlans (ethernetii etype 806) on hybrid ports.

since they're carrying two untagged vlans no further configuration is neccesary.

/j