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340 Administering Advanced Performance Monitoring (APM)
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.
4/16 SAN Switch and 4/8 SAN Switch, Brocade 4Gb SAN Switch for HP p-Class BladeSystem, Brocade
4Gb SAN Switch for HP c-Class BladeSystem, SAN Switch 2/8V, SAN Switch 2/16V, SAN Switch 2/32,
and SAN Director 2/128 models allow up to eight end-to-end monitors.
The SAN Switch 4/32, SAN Switch 4/32B, 4/64 SAN Switch, 400 MP Router and 4/256 SAN Director
models allow up to 256 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 FC4-48 blade allows end-to-end monitors on all 48 ports.
For the FC4-16IP, end-to-end monitors are supported on the ASIC 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.
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.
NOTE: The relationship between the area ID for a port and the port number depends upon the PID format
used by the fabric. Refer to ” Configuring the PID format ” on page 423 for more information.
Figure 19 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.
Figure 19 Setting end-to-end monitors on a port
NOTE: End-to-end performance monitoring looks at traffic on the receiving port respective to the SID only.
In Figure 19 , 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.
To monitor the traffic from Host A to Dev B
switch:admin> perfaddeemonitor 2/2, “0x051200” “0x111eef”
End-to-End monitor number 0 added.
. . .
0x051200
0x111eef
Host
A
DID
SID
. . .
Dev
B
Switch x Switch y
Monitor 0
domain 0x05, switch area ID 0x12
AL_PA 0x00
Monitor 1
domain 0x11, switch area ID 0x1e
AL_PA 0xef