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Cisco Native VLANs

jskfan
jskfan asked
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Cisco Native VLANs

I would like to now if  I have few switches that are configured with default Native VLAN 1 and few with Native Vlan 60
will the traffic still go through both native VLANs  without L3 Routing?


Thank you
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SouljaSr.Net.Eng
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Top Expert 2011
Commented:

I believe it will still work even though you will get errors from CDP or STP. 

Sr. Network Engineer
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Commented:

STP would actually partition, meaning you would end up with two seperate STP domains.


CDP may still work but VLAN 60 would have to exist through out your environment, regardless of whether it was tagged or running as native.  Once CDP encountered a boundary where VLAN 60 moved from native to tagged you would get the errors Soulja mentions above.


The place you are going to have the biggest issues beyond STP would be any trunks between switches with different native vlans.  The trunks should come up but they are going to be unstable and problematic.

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Thank you

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