License Usage Within A Cluster - Cisco TelePresence Administrator's Manual

Clustering and peers

License usage within a cluster

Any traversal or non-traversal call licenses that have been installed on a cluster peer are available for use by
any peer in the cluster. Usage is limited to the maximum physical capacity of each VCS unit:
Table 3: Maximum physical capacity per peer
Traversal calls
Non-traversal calls
Registrations
TURN relays *
* On a Large VM, the total TURN capacity of 6000 relays is spread evenly across 6 ports; each port is limited
to handling 1000 relays. On VCS appliances (or equivalent VM), there is a single TURN port that handles up
to 1800 relays.
Note that each VCS comes pre-installed with 2,500 registration licenses, and that registration and
TURN relay licenses are not shared across a cluster.
If two endpoints are registered to different cluster peers, and a SIP call is made between them, two non-
traversal licenses are used. If the call is made over H.323, only one non-traversal license is used.
You can cluster up to 6 VCS systems to increase capacity by a maximum factor of 4 (see
capabilities [p.356] for more information).
If a cluster peer becomes unavailable, the shareable licenses installed on that peer remain available to the
rest of the cluster peers for two weeks from the time the cluster lost contact with the peer. This will maintain
the overall license capacity of the cluster — however, note that each peer is still limited by its physical
capacity as listed above. After this two week period, the licenses associated with the unavailable peer are
removed from the cluster. To maintain the same capacity for your cluster, you should ensure that either the
problem with the peer is resolved or new option keys are installed on another peer in the cluster.
Note that you are also limited to the number of call license option keys that can be installed (purchased) per
VCS peer as follows:
Table 4: Maximum call license option keys that can be installed (purchased) per peer
Traversal calls
Non-traversal calls
TURN relays
You can see a summary of all of the call, registration and TURN relay licenses installed on each cluster peer
by going to the Option keys
Capacity alarms are raised if either of the following usage thresholds are reached:
the number of concurrent traversal/non-traversal calls reaches 90% of the capacity of the cluster
n
the number of concurrent traversal/non-traversal calls on any one unit reaches 90% of the physical
n
capacity of the unit
Cisco VCS Administrator Guide (X8.1.1)
Large VM servers VCS appliances (or equivalent VM)
500
750
5000
6000
Large VM servers VCS appliances (or equivalent VM)
500
500
6000
page and scrolling down to the
150
750
2500
1800
100
500
1800
Current licenses section.
License usage within a cluster
Performance
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