Maximum number of participants – Cisco ASA 5505 User Manual

Page 147

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3-27

Cisco ASA 5500 Series Configuration Guide using the CLI

Chapter 3 Managing Feature Licenses

Information About Feature Licenses

Figure 3-1

Failover and Shared License Servers

The standby backup server shares the same operating limits as the primary backup server; if the standby
unit becomes active, it continues counting down where the primary unit left off. See the

“Information

About the Shared Licensing Backup Server” section on page 3-25

for more information.

Failover and Shared License Participants

For participant pairs, both units register with the shared licensing server using separate participant IDs.
The active unit syncs its participant ID with the standby unit. The standby unit uses this ID to generate
a transfer request when it switches to the active role. This transfer request is used to move the shared
sessions from the previously active unit to the new active unit.

Maximum Number of Participants

The ASA does not limit the number of participants for the shared license; however, a very large shared
network could potentially affect the performance on the licensing server. In this case, you can increase
the delay between participant refreshes, or you can create two shared networks.

Failover Pair #1

Main (Active)

Main (Standby)

Failover Pair #2

Backup (Active)

Backup (Standby)

1. Normal

operation:

Blue=Shared license
server in use

(Active)=Active
failover unit

Failover Pair #1

Main (Failed)

Main (Active)

Failover Pair #2

Backup (Active)

Backup (Standby)

2. Primary main

server fails over:

Failover Pair #1

Main (Failed)

Main (Failed)

Failover Pair #2

Backup (Active)

Backup (Standby)

3. Both main

servers fail:

Failover Pair #1

Main (Failed)

Main (Failed)

Failover Pair #2

Backup (Failed)

Backup (Active)

4. Both main servers and

primary backup fail:

Key

251356

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