Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
Bandwidth control
The Traversal Subzone page (
VCS configuration > Local Zone > Traversal Subzone
) allows you
to place bandwidth restrictions on calls being handled by the Traversal Subzone and to configure the
range of ports used for the media in traversal calls.
range of ports used for the media in traversal calls.
Configuring bandwidth limitations
All traversal calls are deemed to pass through the Traversal Subzone, so by applying bandwidth
limitations to the Traversal Subzone you can control how much processing of media the Cisco VCS
will perform at any one time. These limitations can be applied on a total concurrent usage basis, and
on a per-call basis.
limitations to the Traversal Subzone you can control how much processing of media the Cisco VCS
will perform at any one time. These limitations can be applied on a total concurrent usage basis, and
on a per-call basis.
See
for more details.
Configuring the Traversal Subzone ports
The Cisco VCS allows you to configure the range of ports used for the media in traversal calls. A
single traversal call can consist of up to 5 types of media (audio, video, far end camera control, dual
streams and BFCP) and each type of media may require a pair of ports – for example, audio and video
each require one port for RTP, and one for RTCP. Separate pairs of ports are required for the inbound
and outbound portions of a call. A single traversal call can therefore take up to 20 ports.
single traversal call can consist of up to 5 types of media (audio, video, far end camera control, dual
streams and BFCP) and each type of media may require a pair of ports – for example, audio and video
each require one port for RTP, and one for RTCP. Separate pairs of ports are required for the inbound
and outbound portions of a call. A single traversal call can therefore take up to 20 ports.
The default range for the ports to be used for media is 50000 - 52399 UDP, but these can be changed
to any values between 1024 and 65533. Ports are allocated from this range in pairs, with the first port
number of each pair being an even number. Therefore the range must start with an even number and
end with an odd number.
to any values between 1024 and 65533. Ports are allocated from this range in pairs, with the first port
number of each pair being an even number. Therefore the range must start with an even number and
end with an odd number.
To configure the ports used for media in traversal calls, go to
VCS configuration > Local Zone >
Traversal Subzone
.
Note: you must ensure that the port range is large enough to support the maximum number of traversal
calls available on your Cisco VCS. A single traversal call can take up to 20 ports (5 pairs in each
direction). So for example, if your Cisco VCS is licensed for 5 traversal calls you must ensure that the
range of ports configured for traversal media is at least 100. If you add extra traversal calls to your
system, you must also ensure that the range of ports available is sufficient.
calls available on your Cisco VCS. A single traversal call can take up to 20 ports (5 pairs in each
direction). So for example, if your Cisco VCS is licensed for 5 traversal calls you must ensure that the
range of ports configured for traversal media is at least 100. If you add extra traversal calls to your
system, you must also ensure that the range of ports available is sufficient.
About the Default Subzone
The Default Subzone page (
VCS configuration > Local Zone > Default Subzone
) is used to place
bandwidth restrictions on calls involving endpoints in the Default Subzone, and to specify the Default
Subzone's registration and authentication policies.
Subzone's registration and authentication policies.
When an endpoint registers with the Cisco VCS, its IP address and alias is checked against the
subzone membership rules and it is assigned to the appropriate subzone. If no subzones have been
created, or the endpoint’s IP address or alias does not match any of the subzone membership rules, it
is assigned to the Default Subzone (subject to the Default Subzone's Registration policy and
Authentication policy).
subzone membership rules and it is assigned to the appropriate subzone. If no subzones have been
created, or the endpoint’s IP address or alias does not match any of the subzone membership rules, it
is assigned to the Default Subzone (subject to the Default Subzone's Registration policy and
Authentication policy).
The use of a Default Subzone on its own (without any other manually configured subzones) is suitable
only if you have uniform bandwidth available between all your endpoints. Note that if your Local Zone
contains two or more different networks with different bandwidth limitations, you should configure
separate subzones for each different part of the network.
only if you have uniform bandwidth available between all your endpoints. Note that if your Local Zone
contains two or more different networks with different bandwidth limitations, you should configure
separate subzones for each different part of the network.
Configuring subzones
The Subzones page (
VCS configuration > Local Zone > Subzones
) lists all the subzones that
have been configured on the Cisco VCS, and allows you to create, edit and delete subzones. For each
subzone, it shows how many membership rules it has, how many devices are currently registered to it,
and the current number of calls and bandwidth in use. Up to 1000 subzones can be configured.
subzone, it shows how many membership rules it has, how many devices are currently registered to it,
and the current number of calls and bandwidth in use. Up to 1000 subzones can be configured.
Cisco VCS Administrator Guide (X6)
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