one to many auto image replication

hi all,

I have 3 master servers.

All NBU appliances. 1 at primary site and 2 at secondary site. say for eg: svr1-primary site, svr2-secondary site, svr3-secondary site.

now the AIR is configured between svr1 and svr2. i want to configure svr3 in such a way that any new clients configured on svr1 replicates both svr3.

Should i configure svr3 as media server to svr2 as master or should i configure svr3 as a separate master altogether?

If there are any technotes or documents that can help me, please provide the same.

Thanks, Anish