Listen, just because Messi Plays for my fav team Barca, does not mean I have to agree with you. Furthermore HOWDARE (joder) you side with that upstart JP obviously hiding in Norway for some reason, instead of a fellow American (you know that North and South American free trade and bonding).
You are partiallly correct. The switch does do vlan tagging and actually changes the data packets. However, I disagree with respect to 802.1p. the Switch does not actually tag packets, but concur it can read them but read on..........
The switch according to how I read the manual.
a. has a mapping table of its priority values physical queues to the standard values 802.1p (this table is strictly for the user to to be able to setup the zyxel values IAW with how they want actual 802.1p packets to be handled and has no actual taggin function just a translation function)
b. the switch knows what the physical priorities are as assigned by the admin. These will be applied to port traffic or vlan traffic.
Now two cases can occur when a traffic arrives or lets say egresses an interface.
(i) It has an 802.1p tagged data
Here the switch which can read the tagged data point but does no direct physical function based on 802.1p. Instead, the switch then uses the mapping table translates it to the physcal queue setting that the user admin put for that 802,1p level ABD THEN ensure proper priority routing. - the switch then treats or maniuplates that data according to the user schema.
(ii) It has no 802.1p tagged data
Here the switch is screwed because no Tagged data is detected.
Luckily the admin has defined a default setting for such data. The switch detecting an untagged packet goes to its admin setting and sees a priority default has been enabled (for that port or vlan) and then applies one of the zyxel PHYSICAL security priority queues to that data. It does not tag it, it simply maniplates it, ie prioritized it internally IAW with the rest of the traffic as per the admin priority routing table.
In both cases above its not the 802.1p that manipulates the datas through the switch in terms of priority. It is the zyxel priority physical queue settings which determine traffic priority flow. If the data is tagged, the switch reads it translates it and then carrys out actions. If untagged, the switch apples a default and carrys on.--
Ain't nuthin but the blues! "Albert Collins".
Leave your troubles at the door! "Pepe Peregil" De Sevilla. Just Don't Wifi without WPA, "Yul Brenner"