Grey Headline (continued)
Bandwidth Control Examples
TANDBERG VIDEO COMMUNICATIONS SERVER ADMINISTRATOR GUIDE
Example With a Firewall
If we modify the previous example deployment to include firewalls between the offices, we can use TANDBERG’s Expressway™ firewall traversal solution to maintain connectivity. We do this by adding a VCS Expressway outside the firewall on the public internet, which will work in conjunction with the VCS Control and Home and Branch office endpoints to traverse the firewalls.
In this example, the endpoints in the Head Office register with the VCS Control, whilst those in the Branch and Home offices register with the VCS Expressway.
VCS CONTROL | VCS EXPRESSWAY |
The introduction of the firewalls means that there is no longer any direct connectivity between the Branch and Home offices. All traffic must be routed through the VCS Expressway. This is shown by the absence of a link between the Home and Branch subzones.
VCS Expressway Subzone Configuration
The VCS Expressway has subzones configured for the Home Office and Branch Office. These are linked to the VCS Expressway’s Traversal Subzone, with pipes placed on each link. All calls from the VCS Expressway to the VCS Control must go
HEAD OFFICE
Default |
Subzone |
Traversal | Traversal | Traversal | |
Client | Server | ||
Subzone | |||
Zone | Zone | ||
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Traversal 
Subzone 
Pipe A
HOME OFFICE
INTERNET
Pipe B Home Office Subzone
through the Traversal Subzone and will consume bandwidth from this Subzone. Note also that calls from the Home Office to the Branch Office must also go through the Traversal Subzone, and will also consume bandwidth from this Subzone as well as the Home and Branch subzones and Home Office, Branch office and Head Office pipes.
In this example we have assumed that there is no bottleneck on the link between the VCS Expressway and the Head Office network, so have not placed a pipe on this link. If you want to limit the amount of traffic flowing through your firewall, you could provision a pipe on this link.
VCS Control Subzone Configuration
Because the VCS Control is only managing endpoints on the Head Office LAN, its configuration is simpler. All of the endpoints in the Head Office are assigned to the Default Subzone. This is linked to the Traversal Subzone, through which all calls leaving the Head Office must pass.
Pipe C
BRANCH OFFICE
Branch Office
Subzone
Introduction | Getting Started |
| Overview and |
| System |
| VCS |
| Zones and |
| Call | Bandwidth | Firewall |
| Maintenance |
| Appendices |
| Status |
| Configuration |
| Configuration |
| Neighbors |
| Processing | Control | Traversal |
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