DNA DR site

[AmrAbdelsalam]

Hi everyone

I have 3 dna appliances in one site version 1.3 / an old version i know , we are planning an upgrade

i understand , and i need more info from you guys, that dna to dna appliance requires vxlan , so the intersite link needs to support higher mtu value 
our ISP has problems with that 

so iam looking into IP transit and SDWAN transit 

can you shed somelight on this topic ??

Thank you 

[balaji.bandi]

You are running 3 node cluster, You looking to deploy another 3 node cluster for DR ?

[AmrAbdelsalam]

Yes , is this strange ??
i am creating a whole dr site , so incase the whole datacenter wentdown

[balaji.bandi]

I want to be sure your requirement,

here is the requirement version to make 3+3+1(witness)

https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center/2-1-2/admin_guide/b_cisco_dna_center_admin_guide_2_1_2/b_cisco_dna_center_admin_guide_2_1_1_chapter_0111.html#concept_mm5_jnw_3jb

2.2.2  have better in GUI :

https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center/2-2-2/admin_guide/b_cisco_dna_center_admin_guide_2_2_2/b_cisco_dna_center_admin_guide_2_2_2_chapter_0111.html#concept_mm5_jnw_3jb

[AmrAbdelsalam]

this was very helpful 

but i dont see a word about the MTU requirements for the inter site link 
is it not a requirement ?