Links And Pipes; Configuring Links - Cisco TelePresence Video Communication Server Administrator's Manual

this situation, the lower limit of 128kbps will apply to calls between the two, regardless of the larger
capacity of the pipe.
In the reverse situation, where Subzone A has a per call inter bandwidth limit of 512kbps and a link to
Subzone B with a pipe of 128, any calls between the two subzones will still be limited to 128kbps.
Bandwidth consumption of traversal calls
A non-traversal call between two endpoints within the same subzone would consume from that
subzone the amount of bandwidth of that call.
A traversal call between two endpoints within the same subzone must, like all traversal calls, pass
through the Traversal Subzone. This means that such calls consume an amount of bandwidth from the
originating subzone's total concurrent allocation that is equal to twice the bandwidth of the call – once
for the call from the subzone to the Traversal Subzone, and again for the call from the Traversal
Subzone back to the originating subzone. In addition, as this call passes through the Traversal
Subzone, it will consume an amount of bandwidth from the Traversal Subzone equal to that of the call.

Links and pipes

Configuring links

Links connect local subzones with other subzones and zones. For a call to take place, the endpoints
involved must each reside in subzones or zones that have a link between them. The link does not need
to be direct; the two endpoints may be linked via one or more intermediary subzones.
Links are used to calculate how a call is routed over the network and therefore which zones and
subzones are involved and how much bandwidth is available. If multiple routes are possible, your VCS
will perform the bandwidth calculations using the one with the fewest links.
The Links page (VCS configuration > Bandwidth >
create, edit and delete links.
The following information is displayed:
Field Description
Name The name of the link. Automatically created links have names based on the nodes
that the link is between.
Node 1 and The two subzones, or one subzone and one zone, that the link is between.
Node 2
Pipe 1 and Any pipes that have been used to apply bandwidth limitations to the link. See
Pipe 2 Applying pipes to links
Calls Shows the total number of calls currently traversing the link.
Bandwidth Shows the total amount of bandwidth currently being consumed by all calls traversing
used the link.
You can configure up to 3000 links.
Whenever a subzone or zone is created, certain links are automatically created; see
further information.
Cisco VCS Administrator Guide (X6.1)
Links) lists all existing links and allows you to
for more information.
Bandwidth control
Default links for
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