What causes native VLAN mismatch?
A VLAN mismatch occurs when two connected switchports have different VLAN configurations. For example, switch 1 port 1 is configured for native VLAN: 1, allowed VLANs: all. In this scenario, a host in VLAN 3 on switch 1 would not be able to communicate with a host on switch 2 in the same VLAN.
What is the difference between native VLAN and default VLAN?
Both terms are related to 802.1q….Native VLAN vs Default VLAN Comparison Table-
| PARAMETER | DEFAULT VLAN | NATIVE VLAN |
|---|---|---|
| Encapsulation type | Support on both dot1q and ISL encapsulation | Support on dot1q encapsulation only |
| Cisco Recommendation | Default VLAN should be VLAN 1 | Native VLAN should be VLAN other than 1 |
Can a DTP detect a native VLAN mismatch?
DTP does not detect a native VLAN mismatch. With regards to native VLAN mismatch and its detection, DTP is irrelevant – we can safely forget about it. CDP detects a native VLAN mismatch both on access and trunk ports (on access ports, it detects that the access VLAN is mismatched). However, it does not take any protective action.
Can a Cisco PVST + detect a VLAN mismatch?
Cisco PVST+ and Rapid-PVST+ are able to detect a native VLAN mismatch but only on trunk ports. They are unable to detect a mismatch of access VLANs between a pair of interconnected access mode ports. On trunks, PVST+ and Rapid-PVST+ will block both mismatched native VLANs until the mismatch is corrected. 01-23-2018 02:57 AM 01-23-2018 02:57 AM
Is there a VLAN mismatch between two devices?
You had configured trunk port between two devices and there is VLAN misconfiguration on any of the device. For example: SwitchA (Port1)—-trunk port ——- SwitchB (Port2) are connected than where is a mistake:
How to report native VLAN mismatch in gi6?
CDP-W-NATIVE_VLAN_MISMATCH: interface gi6.Native VLAN mismatch detected on interface gi6. The Native VLAN mismatch is reported by the CDP protocol. Why is it happening?