Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
* On a Large system, the total TURN capacity of 6000 relays is spread evenly across 6 ports; each port is limited to
handling 1000 relays. On a Small/Medium system, there is a single TURN port that handles up to 1800 relays.
handling 1000 relays. On a Small/Medium system, 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 licenses are not
shared across a cluster.
shared across a 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 Option keys page and scrolling down to the Current licenses section.
to the Option keys page and scrolling down to the Current licenses section.
Licenses Used in Intracluster Calls
This section describes the licenses used when endpoints are registered to different peers in the same cluster.
If the call media does not traverse the cluster peers:
■
A SIP call between the endpoints consumes two non-traversal call licenses (one on each node).
■
An H.323 call between the endpoints consumes one non-traversal license (on the node where the endpoint
that initiated the call is registered).
that initiated the call is registered).
If the call media traverses the cluster peers, or if either endpoint is registered with ASSENT or H.460 capability:
■
A SIP call between the endpoints consumes two traversal call licenses (one on each node).
■
An H.323 call between the endpoints consumes two traversal call licenses (one on each node).
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
■
the number of concurrent traversal/non-traversal calls on any one unit reaches 90% of the physical capacity
of the unit
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:
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 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.
the peers is temporarily taken out of service the full set of call licenses will remain available to the entire cluster.
We recommend that, where possible, you distribute the licenses evenly across all peers in the cluster.
Managing Clusters and Peers
Setting Up a Cluster
Prerequisites
Before setting up a cluster of X8.8 VCS peers or adding an X8.8 VCS to a cluster, ensure that:
Platform and Software Versions Match
■
All clusters peers are running the same version of code. The only occasion where different peers are allowed
to run different versions of code is for the short period of time while a cluster is being upgraded from one
version of code to another, during which time the cluster will operate in a partitioned fashion.
to run different versions of code is for the short period of time while a cluster is being upgraded from one
version of code to another, during which time the cluster will operate in a partitioned fashion.
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Cisco TelePresence Video Communication Server Administrator Guide
Clustering and Peers