Cisco Cisco TelePresence Video Communication Server Expressway Maintenance Manual
Applying Pipes to Links
Pipes are used to restrict the bandwidth of a link. When a pipe is applied to a link, it restricts the bandwidth of calls
made between the two nodes of the link - the restrictions 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.
made between the two nodes of the link - the restrictions 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.
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.
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.
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.
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.
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.
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Cisco TelePresence Video Communication Server Administrator Guide