replicating domain controller best practice

[dirkdigs]

hello all,

i have a 2 site network . 2 physical locations. 2 subnets. both sites are on the same active directory domain.

is there any need to replicate my primary dc from site 1 to site 2 if i also have backup DC in site 2?

What do most people recommend doing ?

I am kind of thinking that if site 1 goes down . i could still operate using the backup dc. probably would just have to seize the fsmo server roles?

any helpful input appreciated in advance .

thanks.

[foggy]

I'd say in this case replicating primary DC is not necessary, unless it also runs some other valuable roles.