The Native VLAN is used to pass untagged traffic (non-vlan associated) to a neighboring switch
- On a trunk link, each frame must be distinguishable as being within exactly one VLAN
- If a frame does not carry an 802.1Q VLAN tag, it is considered to be in the Native VLAN
- By default the Native VLAN is 1
- You should change the native vlan to an unused vlan - read about double tagging
PacketTracer Lab: CCNA-2.5.f-How-to-configure-the-native-vlan.pkt
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