> # Trunking Misconfiguration Examples

> If you do not configure the VSANs correctly, issues with the connection may occur. For example, if you merge the traffic in two VSANs, both VSANs will be mismatched. The trunking protocol validates the VSAN interfaces at both ends of a link to avoid merging VSANs .

> The trunking protocol detects potential VSAN merging and isolates the ports involved .

> The trunking protocol cannot detect merging of VSANs when a third-party switch is placed in between two Cisco MDS 9000 Family switches.

> VSAN 2 and VSAN 3 are effectively merged with overlapping entries in the name server and the zone applications. Cisco DCNM-SAN helps detect such topologies.

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