Technical data

14-4 Fabric OS Administrator’s Guide

Publication Number: 53-0000518-09

Monitoring End-to-End Performance

You can monitor end-to-end performance using the perfMonitorShow command, as described in

“Displaying Monitor Counters” on page 14-11. You can clear end-to-end counters using the

perfMonitorClear command, as described in “Clearing Monitor Counters” on page 14-14.

Adding End-to-End Monitors

An end-to-end monitor counts the following items for a port: number of words received, number of

words transmitted, and number of CRC errors detected in frames.

SilkWorm 200E, 3016, 3250, 3850, 3900, 4012, 12000, and 24000 models allow up to eight end-to-end

monitors.

The SilkWorm 4100 and 48000 models allow up to 256 end-to-end monitors shared by all ports. (The

number of interswitch links configured on the switch affects the amount of resources available for end-

to-end monitors.)

End-to-end monitors cannot be added to interswitch links.

The monitor count is qualified using either of following conditions:

• For frames received at the port with the end-to-end monitor installed, the frame SID is the same as

“SourceID” and the frame DID is the same as “DestID”. The RX_COUNT and CRC_COUNT are

updated accordingly.

• For frames transmitted from the port with the end-to-end monitor installed, the frame DID is the

same as “SourceID” and the frame SID is the same as “DestID”. The TX_COUNT and

CRC_COUNT are updated accordingly.

Figure 14-1 shows two devices:

• Host A is connected to domain 5 (0x05), switch area ID 18 (0x12), AL_PA 0x00 on Switch X

• Dev B is a storage device connected to domain 17 (0x11), switch area ID 30 (0x1e), AL_PA 0xef

on Switch Y.

ote

For end-to-end monitors, CRC counters are not displayed on the SilkWorm 200E, 4012, 4100, and

SilkWorm 48000 switches.

ote

How the area ID for a port relates to the port number depends upon the PID format used by the fabric.

Refer to “Configuring the PID Format” on page A-1 for more information.