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OTV - Extending same VLAN across Datacenters

Hello - I have a requirement to extend a VLAN across three Datacenters as shown in the diagram attached. I am using Unicast deployment. 

Existing Configuration of SITE-A
interface Overlay1
description /// Vlan 200 OTV Overlay to B///
otv join-interface Ethernet1/14
otv extend-vlan 200
otv adjacency-server unicast-only


Error prompt when below configuration is applied in SITE-A
interface Overlay2
description /// Vlan 200 OTV Overlay to C///
otv join-interface Ethernet1/14
otv extend-vlan 200
otv use-adjacency-server 10.100.2.118 unicast-only

 

Error Message:
VLAN 200 vlan_id is already enabled for overlay overlay1. Cannot have the same VLAN enabled on multiple overlays. No VLANs in the present command will be extended

 

Thanks & regards, RB

2 REPLIES 2
Cisco Employee

Re: OTV - Extending same VLAN across Datacenters

Are you sure you actually want to have multiple overlays (i.e. 1 & 2) ?

Seems like you would want all the sites under the same overlay if it's involving the same extended vlan.

Your L3 join interfaces should know how to reach the other L3 join interfaces in the other sites.

Assuming you have correctly set unique site-id identifiers, and unicast adjancies server entries....

See https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DCI/whitepaper/DCI3_OTV_Intro/DCI_1.html for some config examples.

 

Kirk...

 

Please mark correctly answered posts as Solved and Helpful, so others searching for same issue can more easily find the solution.

 

Re: OTV - Extending same VLAN across Datacenters

Thanks, Kirk for your response - I attached the configuration. Will this work?

 

regards,RB

 

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