Hello Manikanth
Yes, this is a valid design approach. TLOC Extension allows one SD-WAN device (e.g., C8300 Edge) to extend its transport reachability to another device (e.g., vEdge) when one of them has no direct transport access. This is useful when only one device has a transport link, and you want the second device to use it for connectivity.
We don’t currently have any lessons that deal with TLOC extension in an SD-WAN environment, however, you can go to the Member Ideas page below and make your suggestion. You may find that others have had similar suggestions, and you can add your voice to theirs:
In the meantime, the Cisco SD-WAN design guide is an excellent source for understanding how this feature works.
I hope this has been helpful!
Laz