Cisco TelePresence Administrator's Manual page 222

Limitation Description
Total Limits the total concurrent bandwidth being used by all
endpoints in the subzone at any one time. In the case of the
Traversal Subzone, this is the maximum bandwidth available
for all concurrent traversal calls.
Calls entirely Limits the bandwidth of any individual call between two
within... endpoints within the subzone.
Calls into or Limits the bandwidth of any individual call between an
out of... endpoint in the subzone, and an endpoint in another
subzone or zone.
Calls handled The maximum bandwidth available to any individual traversal
by... call.
For all the above limitations, the Bandwidth restriction setting has the following effect:
No bandwidth: no bandwidth is allocated and therefore no calls can be made.
n
Limited: limits are applied. You must also enter a value in the corresponding bandwidth (kbps) field.
n
Unlimited: no restrictions are applied to the amount of bandwidth being used.
n
Use subzone bandwidth limits if you want to configure the bandwidth available between one specific
subzone and all other subzones or zones.
Use pipes if you want to configure the bandwidth available between one specific subzone and another
specific subzone or zone.
If your bandwidth configuration is such that multiple types of bandwidth restrictions are placed on a call (for
example, if there are subzone bandwidth limits and pipe limits), the lowest limit will always apply to that call.
How different bandwidth limitations are managed
In situations where there are differing bandwidth limitations applied to the same link, the lower limit will
always be the one used when routing the call and taking bandwidth limitations into account.
For example, Subzone A may have a per call inter bandwidth of 128. This means that any calls between
Subzone A and any other subzone or zone will be limited to 128kbps. However, Subzone A also has a link
configured between it and Subzone B. This link uses a pipe with a limit of 512kbps. In 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.
Cisco VCS Administrator Guide (X7.2)
Bandwidth control
Can be applied to
Default Subzone
Traversal Subzone
Manually configured subzones
Default Subzone
Manually configured subzones
Default Subzone
Manually configured subzones
Traversal Subzone
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