Question about trunking modes compatibility

I have a question about vlan trunking in regards to how switches in different management domains, and ones in transparent mode would work together.

Simply, consider the following scenario

2 switches are configured as server mode, in the vtp domain Test, with a vtp password of cisco.

1 switch is configured as transparent mode, with no vtp domain or password.

All 3 switches are trunked together in a circle.

You create vlan id 5 on the 2 switches which are in the same management domain, and you manually add vlan id 5 to the transparent mode switch.

Will the transparent mode switch be able to communicate with the other 2 switches on vlan id 5, or any other common vlan id between them?

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Comments

kryolla

For DTP to work your domain has to match between all switches. Just hard code dot1q and mode trunk

yuriz43

Ok, so if I force all the trunk interfaces as 'switchport mode trunk' the vlan traffic in vlan id 5 will be passed, even if the transparent mode switch is in the null management domain??

kryolla

yes as long as spanning tree is forawding the traffic.

GT-Rob

yes you can still make the trunk, its DTP that won't run if they are in different domains.