Hello,
Please can anyone indicate me some values for the network bandwidth requirements for the following case:
4 Sites, each connected with 20Mb MPLS. Actually there is one non MS Mail system in each site. the 20Mb are 80% used in busniness Hour.
Site 1 : 200 users
Site 2 : 400 users
Site 3 : 600 users
Site 4 : 800 users (the "central site" with SMTP gateway)
The migration plan is to move to a multi-site DAG with active-passive DB in respective site + one lagged passive of each site in the "central" site.
By my lecture, the designe would be :
- 1 DAG covering the 4 sites
- 1 CAS Array per site
- 1 HLB per CAS Array
Can you please indicate me :
- if my design understanding is correct.
- the required bandwidth per user (20-50 mails per day at most, but as Exchange doesn't do deduplication, one email with 5Mo attachement sent to say, 100 users, represent 500Mo (Not Mb) of transfert, isn't it?
- if exchange 2013 DAG DB copy replication can be configured to be restricted to Of-business hours (per DB). Most needed in the time of coexistence/migration, when replication Data will be hughe..
Well, I would like real life multi-site replication experiments advice.. please.. would be greatly appreciated.
Thank you a lot
CZ