Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
Bandwidth control
Cisco VCS Administrator Guide (X7.0)
Page 212 of 488
About subzones
The Local Zone is made up of subzones. Subzones are used to control the bandwidth used by various
parts of your network, and to control registrations.
parts of your network, and to control registrations.
When an endpoint registers with the VCS it is allocated to an appropriate subzone, determined by
based on endpoint IP address ranges or alias pattern matches.
You can create and configure subzones through the
page (
VCS configuration > Local Zone
> Subzones
).
Three special subzones — the Default Subzone, the Traversal Subzone and the Cluster Subzone (only
applies if the VCS is in a cluster) — are automatically created and cannot be deleted.
applies if the VCS is in a cluster) — are automatically created and cannot be deleted.
Default links between subzones
The VCS is shipped with the Default Subzone and Traversal Subzone (and Default Zone) already
created, and with links between the three. You can delete or amend these
created, and with links between the three. You can delete or amend these
if you need to
model restrictions of your network.
About the Traversal Subzone
The Traversal Subzone is a conceptual subzone. No endpoints can be registered to the Traversal
Subzone; its sole purpose is to control the bandwidth used by
Subzone; its sole purpose is to control the bandwidth used by
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.
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 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 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 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.
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
any values between 1024 and 65533. Ports are allocated from this range in pairs, with the first port