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Fabric OS Administrator’s Guide
53-1001763-02
Advanced Performance Monitoring overview
17
ISL monitors measure the traffic transmitted through an InterSwitch Link (ISL) to different 
destination domains.
Top Talkers monitors measure the flows that are major consumers of bandwidth on a switch or 
port.
The type of monitors supported depends on the switch model, as shown in 
.
NOTE
Advanced Performance Monitoring is not supported on VE_Ports and EX_Ports. If you issue 
commands for any Advanced Performance Monitors on VE_Ports or EX_Ports you will receive error 
messages.
Virtual Fabrics considerations for Advanced Performance Monitoring
In a fabric with Virtual Fabrics enabled, the number of logical switches that can be configured with 
monitors is restricted. 
 lists the platforms that support logical switches and, for each 
platform, the maximum number of logical switches that can support performance monitors.
Each logical switch can have its own set of performance monitors. The installation of monitors is 
restricted to the ports that are present in the respective logical switch.
Top Talker and end-to-end monitors are supported on the default logical switch, the base 
switch, and user-defined logical switches. 
Frame monitors are not supported on logical ISLs (LISLs) in user-defined logical switches.
ISL monitors are not supported on any of the platforms listed in 
.
If you move a port from one logical switch to another, the behavior of monitors installed on that port 
is as follows:
Frame monitor: Any frame monitors on the port are deleted. To keep the frame monitor, you 
must manually install it on the port after the move.
TABLE 81
Types of monitors supported on Brocade switch models
Platform
Monitors:
EE
Frame ISL
Top Talker
Brocade 300, 5300, 7800
Yes Yes
No
Yes
Brocade 5410, 5424, 5450, and 5480
Yes Yes
No
No
Brocade 4100, 4900, 5000, 7500, 7500E, 7600, and 48000
Yes Yes
Yes Yes
Brocade 5100, 8000
1
, VA-40FC, Brocade Encryption Switch, 
Brocade DCX, Brocade DCX-4S
1.
For the Brocade 8000, performance monitoring is supported only on the FC ports and not on the CEE ports.
Yes Yes
No
Yes
TABLE 82
Number of logical switches that support performance monitors 
Platform
Maximum number of logical switches supported
Maximum number of logical switches on which 
monitors are supported
Brocade DCX
8
4
Brocade DCX-4S
8
4
Brocade 5100
Brocade VA-40FC
3
3
Brocade 5300
4
3