TANDBERG D14049.01 manual Applying Bandwidth Limitations to Subzones, Types of Limitations

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TANDBERG VIDEO COMMUNICATION SERVER ADMINISTRATOR GUIDE

Applying Bandwidth Limitations to Subzones

Types of Limitations

You can apply bandwidth limits to the Default Subzone, Traversal Subzone and all manually configured subzones. The types of limitations you can apply vary depending on the type of subzone, as follows:

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.

Limitation	Description
Total	Limits the total concurrent bandwidth being
	used by all endpoints in the subzone at any
	one time.
Per call intra	Limits the bandwidth of any individual call
	between two endpoints within the subzone.
Per call inter	Limits the bandwidth of any individual call
	between an endpoint in the subzone, and an
	endpoint in another subzone or zone.

Can be applied to

•Default Subzone

•Traversal Subzone

•Manually configured subzones

•Default Subzone

•Manually configured subzones

•Default Subzone

•Traversal Subzone

•Manually configured subzones

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.

For all these settings, a bandwidth mode of:

•None will mean that no bandwidth is allocated and therefore no calls can be made.

•Limited will mean that limits are applied. You must also enter a value in the corresponding bandwidth (kbps) field.

•Unlimited will mean that no restrictions will be applied to the amount of bandwidth being used.

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 both subzone bandwidth limits and pipe limits), the lowest limit will always apply to that call.

A non-traversal call between two endpoints within the same subzone would consume the

amount of bandwidth of that call. A traversal call between two endpoints within the same subzone must, like any other traversal call, pass through the Traversal Subzone. This

means that such calls will consume from the originating subzone’s total concurrent allocation 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.

Calls passing through the Traversal Subzone consume an amount of bandwidth within the subzone equal to that of the call.

Introduction	Getting	System	System	H.323 & SIP	Registration	Zones and	Call	Firewall	Bandwidth	Maintenance	Appendices
	Started	Overview	Configuration	Configuration	Control	Neighbors	Processing	Traversal	Control
D 14049.01					113
07.2007