Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
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:
any peer in the cluster. Usage is limited to the maximum physical capacity of each VCS unit:
Large VM servers
VCS appliances (or equivalent VM)
Traversal calls
500
150
Non-traversal calls
750
750
Registrations
5000
2500
Note that each VCS comes pre-installed with 2,500 registration licenses, and that registration licenses are
not shared across a cluster.
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.
traversal licenses are used. If the call is made over H.323, only one non-traversal license is used.
If a cluster peer becomes unavailable, the shareable licenses installed on that peer will 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.
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.
You can see a summary of all of the call, registration and TURN relay licenses installed on each cluster peer
by going to the
by going to the
Option keys
page and scrolling down to the
Current licenses
section.
Capacity alarms are raised if either of the following usage thresholds are reached:
n
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
capacity of the unit
capacity of the unit
Example deployment
If, for example, you want to deploy a resilient cluster that can handle up to 750 concurrent non-traversal calls
and 250 concurrent traversal calls you could configure 4 peers as follows:
and 250 concurrent traversal calls you could configure 4 peers as follows:
Peer 1
Peer 2
Peer 3
Peer 4
Total cluster
capacity
Non-traversal call licenses
250
250
250
0
750
Traversal call licenses
100
100
50
0
250
It would not matter to which peer an endpoint registers as the call licenses are shared across all of the peers.
If any one of the peers is temporarily taken out of service the full set of call licenses will remain available to
the entire cluster.
If any one of the peers is temporarily taken out of service the full set of call licenses will remain available to
the entire cluster.
However, we recommend that, where possible, the number of licenses is configured evenly across all peers
in the cluster.
in the cluster.
Cisco VCS Administrator Guide (X8.1)
Page 161 of 504
Clustering and peers
License usage within a cluster