Cisco Cisco Expressway 维护手册
All statistics are based on data since the system was last restarted. The information on this page refreshes
automatically every 5 seconds.
automatically every 5 seconds.
Clustered Expressway systems
If the Expressway is part of a cluster, details for each peer are shown as well as totals for the entire cluster.
The following types of licenses are pooled for use by any peer in a cluster, irrespective of which peer the licenses are
installed on:
installed on:
■
Rich media session licenses
■
TURN relay licenses
You can cluster up to 6 Expressway systems to increase capacity by a maximum factor of 4.
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 limited by its physical capacity. 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.
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 limited by its physical capacity. 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.
Small / Medium / CE500 /
CE1100
‡
systems
Large / CE1000 / CE1100
‡
systems
Rich media sessions
150
†
500
Room / Desktop system
registrations
registrations
2500
5000
TURN relays *
1800
6000
Table 17 Maximum licenses that a peer can use
‡ CE1100 appliance can run with medium or large capacity, depending on whether it has 1Gbps or 10Gbps NICs
installed.
installed.
† This is the maximum number of licenses the system can use. This limit specifically applies to the case where a peer
becomes unavailable and the other peers must use that peer's licenses to honor the cluster's overall capacity. This is
not intended as a production capacity limit, only as a temporary measure to allow the affected peer to be returned to
normal service. We strongly discourage installing more than 100 licenses on any platform that has small or
medium capacity.
becomes unavailable and the other peers must use that peer's licenses to honor the cluster's overall capacity. This is
not intended as a production capacity limit, only as a temporary measure to allow the affected peer to be returned to
normal service. We strongly discourage installing more than 100 licenses on any platform that has small or
medium capacity.
* 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.
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 call between the endpoints does not consume any RMS licenses; this is a "Registered" call.
If the call media traverses the cluster peers:
■
A call between the endpoints consumes an RMS license on the Expressway where the B2BUA is engaged.
290
Cisco Expressway Administrator Guide
Overview and Status Information