Your question seems quite vague to me - could you be more specific?  
Bandwidth, firewalls, multiplatform, data size, layout of NBU servers?  

My guess is that your biggest concern for your Metropolitan Area Network
would center around your firewall and/or available bandwidth.

"Cn, Sivaselvam" wrote:
> 
> > Hello All,
> >
> >
> > What are all the issues/bottlenecks  in implementing Veritas
> > NetBackup(3.4) backup/restore over MAN? Request info/suggestions on this.
> >
> > I would require info on any configuration changes on the NetBackup
> > parameters (timeout value etc.) required for supporting this.