Q-Logic 5800V Manuel D’Utilisation

2–Planning

Feature Licensing

59265-02  B

2-5

Latency is a measure of how fast a frame travels through a switch from one port to 
another. The factors that affect latency include transmission rate and the source 
and destination port relationship as shown in 

.

License keys provide a way to expand the capabilities of your switch and fabric as 
your needs grow. Consider your need for the following features and arrange to 
purchase license keys from your switch distributor or authorized reseller:



The Enterprise Fabric Suite license provides access to the Enterprise Fabric 
Suite graphical user interface that provides comprehensive fabric 
management for fabrics of four or more switches. This license enables you 
to download, install, and use Enterprise Fabric Suite on an unlimited number 
of workstations. Enterprise Fabric Suite is available with a 30-day trial 
license on the CD that is included with the switch product.



The port activation license activates additional SFP ports for a total of 16, 
20, or 24 ports.



The 20Gb license enables the XPAK ports to transmit and receive at 
25.5Gbps instead of the default 12.75Gbps.

Upgrading a switch is not disruptive, nor does it require a switch reset. To order a 
license key, contact your switch distributor or your authorized reseller. For more 
information about installing a license key, refer to 

2

< 0.6 µs

< 0.7 µs

 1

1

 Based on minimum frame size of 36 bytes. Latency increases for larger frame sizes.

< 0.6 µs

1

< 0.6 µs

1

< 0.6 µs

1

4

< 0.4 µs

< 0.3 µsec

< 0.4 µsec

1

< 0.4 µsec

1

< 0.3 µsec

1

8

< 0.3 µs

< 0.2 µs

< 0.2 µs

< 0.2 µs

1

< 0.2 µs

1

10

< 0.3 µs

< 0.3 µs

< 0.2 µs

< 0.2 µs

< 0.2 µs

1

20

< 0.3 µs

< 0.2 µs

< 0.2 µs

< 0.2 µs

< 0.2 µs