Cisco ESAs in different DC locations

[galin.gospodinov]

Hello community, 

is their some requirements about two ESAs placed in DCs in different location ?

I can`t find in the documentation.

Thank you!

[Ken Stieers]

Do you mean if they're clustered?
Config replication is over SSH, so it doesn't have to be super fast.

https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/118174-technote-esa-00.html

[galin.gospodinov]

Yes, the are in cluster. So their is not some network requirements like speed or something like that. 

[Ken Stieers]

I haven't found any.
There are a couple versions of the doc I linked, no mention of speed or latency.
There isn't anything in the configuration guide either.

Again, its over SSH, so if an SSH connection can stay up, its going to work.
The one limit I've seen is the number of machines in a network, which is 20.