Technical data

Fabric OS Administrator’s Guide 14-5
Publication Number: 53-0000518-09
Monitoring End-to-End Performance
14
Figure 14-1 Setting End-to-End Monitors on a Port
To monitor the traffic from Host A to Dev B
Add Monitor 0 to slot 2, port 2 on Switch x, specifying 0x051200 as the SID and 0x111eef as the DID,
as shown in the following example:
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, TX_COUNT is the number of words from
Dev B to Host A, and CRC_COUNT is the number of frames in both directions with CRC errors.
To monitor the traffic from Dev B to Host A
Add Monitor 1 to slot 2, port 14 on Switch y, specifying 0x111eef as the SID and 0x051200 as the DID,
as shown in the following example.
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, TX_COUNT is the number of words from
Host A to Dev B, and CRC_COUNT is the number of frames in both directions with CRC errors.
Figure 14-2 shows several switches and the correct ports on which to add performance monitors for a
specified SID-DID pair.
Figure 14-2 Proper Placement of End-to-End Performance Monitors
. . .
0x051200
0x111eef
Host
A
DID
SID
. . .
Dev
B
Switch x Switch y
M
onitor 0
d
omain 0x05, switch area ID 0x12
A
L_PA 0x00
Monitor 1
domain 0x11, switch area ID 0x1e
AL_PA 0xef
N
ote
End-to-end performance monitoring looks at traffic on the receiving port respective to the SID only. In
Figure 14-1, if you add a monitor to slot 2, port 2 on Switch x, specifying Dev B as the SID and Host A
as the DID, no counters (except CRC) will be incremented.
switch:admin> perfaddeemonitor 2/2, “0x051200” “0x111eef”
End-to-End monitor number 0 added.
switch:admin> perfaddeemonitor 2/14, “0x111eef” “0x051200”
End-to-End monitor number 1 added.
. . .
0
x051200
Host
A
SID
. . .. . . . . .
Add monitors here
0x111eef
DID
Dev
B