Tandberg Data N3 - Manual (Page 23)

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3.6.2 Bandwidth Control Examples
One possible configuration for the deployment in Figure 5 is shown in Figure 9. Each of the
offices is represented as a separate subzone, with bandwidth configured according to local
policy. The enterprise
’
s leased line connection to the Internet, and the DSL connections to the
remote offices, are modelled as separate pipes.
Enterprise
Branch
Office
Home
Office
Default
sub-zone
Home
sub-zone
Branch
sub-zone
Enterprise
Pipe Home
Pipe
Branch
Pipe
Figure 9 Bandwidth control example
There are no firewalls involved in the scenario shown in figure 1, so we can configure links
between each of the offices. Each link is then assigned two pipes, representing the Internet
connections of the offices at each end of the link. A call placed between the Home Office and
Branch Office will consume bandwidth in the home and branch subzones and on the home
and branch pipe. The enterprise
’
s bandwidth budget will be unaffected by the call.
If we now modify our deployment to include firewalls between the offices, we can use the
firewall traversal capability of the TANDBERG Gatekeeper and Border Controllers to maintain
connectivity.
Figure 10 Network Deployment with firewalls
IP
Border
Controller
MCU
Enterprise
Home Office
DSL
Gatekeeper
Branch Office
1003
1002 1001