Migrating to SD WAN - Best options

[carl_townshend]

Hi All

Just a quick question, if we are to move from a mpls with ISR4K routers to an SDWAN solution, viptela etc.

What would be the best way to start with minimal interruption?

Would you add the HQ main device in first? does viptela use ipsec tunnels between the sites, if so how would you integrate the 2 networks smoothly?

cheers

[balaji.bandi]

Do you have exiting network up and running, you want to migrate them to SD-WAN, they are dual home and single homed ? what IGP running more questions to be asked, if this is big network, suggest to contact Cisco SE or partner for migration.

Still you like to do it yourself - There is good document of SD-WAN Migration guide :

https://www.cisco.com/c/dam/en/us/td/docs/routers/sdwan/migration-guide/cisco-sd-wan-migration-guide.pdf

https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2018/pdf/BRKCRS-2111.pdf

[carl_townshend]

Hi there,

Yes we do have existing network, we use ISR 4K with directly connected MPLS, we also have a backup ISR4K with internet connected directly, over this we use ipsec and gre tunnels from each branch back to the HQ.

We use BGP from the provider, then use OSPF on the overlay tunnels.

How could be move this to an SDWAN? where would you start? At some point you would need to interlink the sdwan or get the routes into it somehow.

What would this typically look like ?

Cheers

[Leo Laohoo]

Carl, 

Talk to your Cisco AM/SE about what you are about to do.  

There are several Cisco-initiated SD-WAN programs aimed at "holding your hand". 

Make sure your Cisco AM/SE are fully aware/across of your plans so they can get assistance to you when you need it.

[inderdeeps]

I would suggest you to have parallelly setup in place which is up and running and move sites one by one to the SDWAN Fabric infrastructure. Start putting the HQ site first and make the environment like it can communicate with SDWAN fabric and non-SDWAN sites as well. The communication between all these sites are over IPSEC as Overlay in SDWAN Fabric and underlay for all the non-SDWAN sites.

Check out migration scenario at page no 24 on below link
https://www.cisco.com/c/dam/en/us/td/docs/routers/sdwan/migration-guide/cisco-sd-wan-migration-guide.pdf 

Regards
Inderdeep Singh
www.thenetworkdna.com