Understanding Overlay Transport Virtualization (OTV)

[kamtarias]

Hi Team,

I want to configure OTV between my 2 Data Centres . I was going through few documentations and I can see that in most of cases shown have point to point link between 2 Data centres. In my case I do not have a point to point link between my Data centre, however there is another centre is between 2 Data centres. Can i still configure OTV  and how ??

[Manish Gogna]

It should be possible as per the following, the OTV functionality can be used for multiple sites

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

Manish

[Rajeshkumar Gatti]

If using Unicast mode then what you have will work to deploy OTV assuming the following -
Routed Network between the Data Centre (Core)
Could be any kind of Unicast Routed Network
Also account for the additional 42byte OTV header which means that the interface MTU needs to be set accordingly

If using multicast mode, the above mentioned plus also need to ensure that multicast routing is set correctly. There are some quick reference guides available but its not one size fits all approach.