Owner's manual

3-4 Advanced Performance Monitoring User’s Guide

Using Advanced Performance Monitoring

Monitor 0 counts the frames that have an SID of 0x051200 and a DID of 0x111eef. For monitor 0,

RX_COUNT is the number of words from Host A to Dev B, CRC_COUNT is the number of

frames from Host A to Dev B with CRC errors, and TX_COUNT is the number of words from

Dev B to Host A.

Monitor 1 counts the frames that have an SID of 0x111eef and a DID of 0x051200. For monitor 1,

RX_COUNT is the number of words from Dev B to Host A, CRC_COUNT is the number of

frames from Dev B to Host A with CRC errors, and TX_COUNT is the number of words from

Host A to Dev B.

Note: End-to-end performance monitoring monitors traffic on the receiving port respective to the

SID only. In Figure 3-1, if you add a monitor to port 2 specifying Dev B as the SID and

Host A as the DID, no counters are incremented.

Valid: perfAddEEMonitor 2, “0x051200”, “0x111eef”

Not valid: perfAddEEMonitor 2, “0x111eef”, “0x051200”

Figure 3-2 shows several switches and the proper ports on which to add performance monitors for a

specified SID-DID pair.

Figure 3-2 Proper placement of end-to-end performance monitors

Setting a Mask for End-to-End Monitors

End-to-end monitors count the number of words in Fibre Channel frames that match a specific

SID/DID pair. If you want to match only part of the SID or DID, you can set a mask on the port to

compare only certain parts of the SID or DID. With no mask set, the frame must match the entire

SID or DID to trigger the monitor counter. By setting a mask, you can choose to have the frame

match only one or two of the three fields (Domain ID, Area ID, AL_PA) to trigger the monitor.

Note: You can set only one mask per port. The mask is applied to all of the end-to-end monitors

on a port. If you subsequently create new monitors on the port, the mask is applied to these

new monitors as well. The counters are reset when you set the mask.

The mask is specified in the form “dd:aa:pp” where dd is the Domain ID mask, aa is the Area ID

mask, and pp is the AL_PA mask. The values for dd, aa, and pp are either ff (the field must match)

or 00 (the field is ignored).

. . .

0x051200

0x111eef

Host

DID

SID

. . .. . . . . .

. . .

0x051200

0x111eef

Host

Dev

SID

DID

. . . . . .. . .

Add monitors here

Dev