VLAN Migration

[daniel8905]

Dear expert,

so example we have two networks that are independent from each other, looking to move it into one fabric and going to sperate them with VRF and different VNI's

the migration i have found a small number on the same VLAN ID

so two switches connected in to one switch (will be removed after the migration) that connects to the core.

just hoping for ideas how move the VLANS with the same ID and have less impact on the network.

thank you for any help and ideas.

[M02@rt37]

Hello @daniel8905 

First important things, assign unique VNIs for each VLAN in each VRF to avoid conflicts. This ensures that the same VLAN ID in different networks won't overlap.

Connect the core devices of the two networks using a common VRF for intercommunication. This allows devices in different VRFs to communicate across the shared infrastructure.

Migrate VLANs in a phased approach to minimize impact. Start with VLANs that have the least impact on critical services and gradually move to more critical ones.

[Ruben Cocheno]

@daniel8905 

VLANs are significant on the leaf only (Fabric), so you can have the same VLAN using a different VNI on the same fabric without a problem, however it is not ideal from the operations overhead and Layer 2 issues that can result from it.

Map the VLANs that have less impact and move them first so you can test your all process as well and feel confident for the remain.

[daniel8905]

thank you both for your input has help very much.