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Forum Discussion

eesun_276598's avatar
eesun_276598
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Dec 06, 2017

VLAN ID and tag

Hi Anyone can make it clear the concept with relation between VLAN ID and its tag in f5. In Cisco switch, vlan id is vlan number, such as vlan 10, vlan 20, vlan 30 etc. And tag is used when two switc...
application delivery
BIG-IP
eesun_276598's avatar
eesun_276598
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Dec 11, 2017

So, when we configure vlan, we could have two choices, one is tagged and other is untagged interface. For example, the tag is 10, then we put it under untagged interface 1.1, the tag 10 means vlan10 will be created, but why we have choice to put it under untagged interface? That would remove tag 10? or if so, what that means after removing tag10? Thank you

 

eesun_276598's avatar
eesun_276598
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Dec 18, 2017

I agree on this comment. but in your first comment, you mentioned " Vlan ID and VLAN tag are the same thing - not only in F5 but across all vendors. This is a networking concept not bound to a specific vendor". "tag" should be concept regarding trunk port. Only when frame enter trunk port, the tag will be added to the frame. While VLAN ID is vlan mark, which identify different vlan. How can you say the two are the same things? Can you explain? Thank you