Cisco Cisco Expressway Maintenance Manual
Bandwidth Control Examples
Without a Firewall
In the example below, there are three geographically separate offices: Head, Branch and Home. All endpoints in the
Head Office register with the Expressway-C, as do those in the Branch and Home offices.
Head Office register with the Expressway-C, as do those in the Branch and Home offices.
Each of the three offices is represented as a separate subzone on the Expressway, with bandwidth configured
according to local policy.
according to local policy.
The enterprise’s leased line connection to the Internet, and the DSL connections to the remote offices are modeled as
separate pipes.
separate pipes.
There are no firewalls involved in this scenario, so direct links can be configured 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.
link is then assigned two pipes, representing the Internet connections of the offices at each end of the link.
In this scenario, a call placed between the Home Office and Branch Office will consume bandwidth from the Home
and Branch subzones and on the Home and Branch pipes (Pipe B and Pipe C). The Head Office’s bandwidth budget
will be unaffected by the call.
and Branch subzones and on the Home and Branch pipes (Pipe B and Pipe C). The Head Office’s bandwidth budget
will be unaffected by the call.
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Cisco Expressway Administrator Guide
Bandwidth Control