Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
Bandwidth control
this situation, the lower limit of 128kbps will apply to calls between the two, regardless of the larger
capacity of the pipe.
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.
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.
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.
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.
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
Cisco VCS will perform the bandwidth calculations using the one with the fewest links.
subzones are involved and how much bandwidth is available. If multiple routes are possible, your
Cisco VCS will perform the bandwidth calculations using the one with the fewest links.
The Links page (
VCS configuration > Bandwidth > Links
) lists all existing links and allows you to
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.
that the link is between.
Node 1 and
Node 2
Node 2
The two subzones, or one subzone and one zone, that the link is between.
Pipe 1 and
Pipe 2
Pipe 2
Any pipes that have been used to apply bandwidth limitations to the link. See
for more information.
Calls
Shows the total number of calls currently traversing the link.
Bandwidth
used
used
Shows the total amount of bandwidth currently being consumed by all calls traversing
the link.
the link.
You can configure up to 3000 links.
Whenever a subzone or zone is created, certain links are automatically created; see
for
further information.
Cisco VCS Administrator Guide (X6)
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