Fabric OS Administrator’s Guide 385
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End-to-end performance monitoring 17
•Top Talker (fabric mode): If fabric mode Top Talkers is enabled on the logical switch, a fabric
mode Top Talker monitor is automatically installed on the port after it is moved to the logical
switch.
•Top Talker (por t mode): Any port mode Top Talker monitors on the port are deleted. To keep the
port mode Top Talker monitor, you must manually install it on the port after the move.

End-to-end performance monitoring

End-to-end performance monitoring counts the number of words in Fibre Channel frames for a
specified Source ID (SID) and Destination ID (DID) pair. An end-to-end performance monitor
includes these counts:
•RX_COUNT - words in frames received at the port
•TX_COUNT - words in frames transmitted from the port
To enable end-to-end performance monitoring, you must configure an end-to-end monitor on a port,
specifying the SID-DID pair (in hexadecimal). The monitor counts only those frames with matching
SID and DID.
Each SID or DID has the following three fields:
•Domain ID (DD)
•Area ID (AA)
•AL_PA (PP)
For example, the SID 0x118a0f denotes DD 0x11, AA 0x8a, and AL_PA 0x0f.
You can monitor end-to-end performance using the perfMonitorShow command, as described in
“Displaying end-to-end and ISL monitor counters” on page 397. You can clear end-to-end counters
using the perfMonitorClear command, as described in “Clearing end-to-end and ISL monitor
counters” on page 398.

End-to-end monitors

The maximum number of end-to-end monitors supported varies depending on the switch model:
•The Brocade 4100, 4900, 5000, 7500, 7500E, 7600, and 48000 models allow up to 256
end-to-end monitors shared by all ports in the same ASIC chip.
•The Brocade DCX, DCX-4S, 5100, 8000, VA-40FC, and Brocade Encryption Switch models
allow up to 1024 end-to-end monitors shared by all ports in the same ASIC chip.
•The Brocade 300, 5300, 5410, 5424, 5450, 5480, and 7800 models allow up to 768
end-to-end monitors shared by all ports in the same ASIC chip.
The number of interswitch links configured on the switch affects the amount of resources available
for end-to-end monitors.
The Brocade FC4-48 blade allows end-to-end monitors on all 48 ports.
For the FC4-16IP blade, end-to-end monitors are supported on the FC ports (ports 0 through 7), but
not on the GbE ports.
You cannot add end-to-end monitors to interswitch links.
Identical end-to-end monitors cannot be added to the same port. Two end-to-end monitors are
considered identical if they have the same SID and DID values after applying the end-to-end mask.