Applying Pipes To Links - Cisco TelePresence Administrator's Manual
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Bandwidth control
See
Applying bandwidth limitations to subzones
for information about how the bandwidth limits are set and
managed.
Applying pipes to links
Pipes are used to restrict the bandwidth of a link. When a pipe is applied to a link, it will restrict the bandwidth
of calls made between the two nodes of the link - the restrictions will apply to calls in either direction.
Normally a single pipe would be applied to a single link. However, one or more pipes may be applied to one or
more links, depending on how you want to model your network.
One pipe, one link
Applying a single pipe to a single link is useful when you want to apply specific limits to calls between a
subzone and another specific subzone or zone.
One pipe, two or more links
Each pipe may be applied to multiple links. This is used to model the situation where one site communicates
with several other sites over the same broadband connection to the Internet. A pipe should be configured to
represent the broadband connection, and then applied to all the links. This allows you to configure the
bandwidth options for calls in and out of that site.
In the diagram below, Pipe A has been applied to two links: the link between the Default Subzone and the
Home Office subzone, and the link between the Default Subzone and the Branch Office subzone. In this
case, Pipe A represents the Head Office's broadband connection to the internet, and would have total and
per-call restrictions placed on it.
Two pipes, one link
Each link may have up to two pipes associated with it. This is used to model the situation where the two
nodes of a link are not directly connected, for example two sites that each have their own broadband
connection to the Internet. Each connection should have its own pipe, meaning that a link between the two
nodes should be subject to the bandwidth restrictions of both pipes.
In the diagram below, the link between the Default Subzone and the Home Office Subzone has two pipes
associated with it: Pipe A, which represents the Head Office's broadband connection to the internet, and
Pipe B, which represents the Home Office's dial-up connection to the internet. Each pipe would have
bandwidth restrictions placed on it to represent its maximum capacity, and a call placed via this link would
have the lower of the two bandwidth restrictions applied.
Cisco VCS Administrator Guide (X7.1)
Page 214 of 479
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