Probably a Stupid Question Tagged Interface

birkhojk — Thu, 22 Oct 2020 21:21:00 GMT

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?

Re: Probably a Stupid Question Tagged Interface

OtakarKlier — Thu, 22 Oct 2020 21:56:01 GMT

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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Probably a Stupid Question Tagged Interface

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