What does a weight represent in the Enhanced Location Call Admission Control mechanism on Cisco Unified Communications Manager?
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A weight provides the relative priority of a link in forming the effective path between any pair of locations.
The effective path is the path used by Unified CM for the bandwidth calculations, and it has the least cumulative weight of all possible paths.
Weights are used on links to provide a "cost" for the "effective path" and are pertinent only when there is more than one path between any two locations.
In the Enhanced Location Call Admission Control (CAC) mechanism on Cisco Unified Communications Manager (CUCM), a weight is used to provide the relative priority of a location.
CAC is a mechanism used to control the number of calls that can be made across a network to prevent overloading and degradation of call quality. It works by monitoring the available bandwidth on network links and making decisions about whether new calls should be allowed or blocked based on the available bandwidth.
In the Enhanced Location CAC mechanism, the network is divided into locations, and each location is assigned a weight. The weight represents the relative priority of the location in terms of call admission control. The higher the weight, the more likely it is that calls from that location will be allowed to traverse the network.
When a call is made, the CUCM checks the available bandwidth on the network links between the source and destination locations. If there is enough bandwidth available to support the call, it is allowed to proceed. If there is not enough bandwidth, the CUCM checks the weight of the source location and compares it to the weight of other locations that are currently attempting to make calls. If the weight of the source location is higher than the other locations, the call is allowed to proceed. If the weight is lower, the call is blocked.
Therefore, in summary, the weight in the Enhanced Location CAC mechanism on CUCM is used to provide the relative priority of a location in terms of call admission control, helping the CUCM make decisions about whether to allow or block calls based on the available bandwidth and the priority of the locations.