Probably a Stupid Question Tagged Interface

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Highlighted
L1 Bithead

Probably a Stupid Question Tagged Interface

This is probably a stupid question, but if I just create another Layer-3 sub-interface off of an existing physically connected interface, and TAG that sub interface, that is all I need to do to bring a tagged trunk in through an existing physical connection right?

 

Excluding, zones, virtual routers, policies, and all that other stuff, but the connectivity itself.

 

Say I have ethernet 1/1, which is Layer-3 10.0.0.1/30 and it has no tag or is UNTAGGED (i.e. no 802.1q) and let's say it is in the Inside Zone.

 

I could re-use that same physical connection ethernet 1/1 right and assign it say...

 

ethernet 1/1.123 TAG 123 Layer-3 192.168.0.1/30 My_Other_Zone

 

 

Doing that will not adversely impact my physical untagged connectivity right?

Highlighted
Cyber Elite

Hello,

No stupid questions here. You are correct where it should not disrupt the untagged traffic. Check out these articles.

 

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClFNCA0

 

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClheCAC

 

Cheers!

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