Cisco MeetingPlace Video Integration Administrator's Manual page 51

Chapter 4 Configuring and Managing Cisco MeetingPlace Video Integration
We recommend setting the number of video overbook ports to about 20% of the total number of video
conferencing ports available. To make optimal use of video conferences and ports that are available on
your system, determine the number of overbook ports according to the following formula:
Mod [(Total number of video ports available on the Cisco IPVC MCU - Total number of video floater
ports + Number of video overbook ports) /Total number of video conferences available on the
Cisco IPVC MCU]= 0
In other words, the total number of video ports available on the Cisco IPVC MCU, minus the total
number of floater ports you have specified, plus the number of overbook ports you choose, altogether
must be evenly divisible by the total number of conferences available on the Cisco IPVC MCU. If you
perform this calculation and the result is not a whole number, increase or decrease the number of
overbook ports until your result has no remainder.
For example, suppose your values are as indicated in
Table 4-3
Variable
Total number of video ports available
Number of video floater ports (including
the required minimum number of video
floater ports plus optional additional
video floater ports)
Estimated number of video overbook
ports
Total number of video conferences
available
Calculation result is a whole number?
Is this an optimal number of video
overbook ports?
The result of your calculation using the values in Example 1 would be (24-8+6)/10, or 2.2, so 6 is not an
optimal number of overbook ports. If you decrease the estimated number of overbook ports by 2, as in
Example 2, your result is 2, a whole number. Therefore, one optimal number of overbook ports is 6-2,
or 4. If you prefer more overbook ports, increase the estimated number of overbook ports by 8, as in
Example 3, so that your optimal number of overbook ports is 6+8, or 14. You can also modify the number
of floater ports, then try this calculation again.
If you change the number of floater ports, and you have set the number of overbook ports to maximize
video-conferencing resources as described in this section, recalculate the optimal number of overbook
ports.
If you specify more than zero video overbook ports, the system cannot guarantee that video ports will
be available at the time of the meeting, even if the meeting was successfully scheduled. However, this
situation is unlikely if you set the number of overbook ports using the formula in this section.
OL-6280-01
Example Overbook Port Calculation Values
Administrator's Guide for Cisco MeetingPlace Video Integration Release 5.3
About Managing Video-Conferencing Resources
Table 4-3:
Example 1 Example 2
24 24
8 8
6 4
10 10
No Yes
No Yes
Example 3
24
8
14
10
Yes
Yes
4-9