HP StorageWorks Fabric OS 6.x administrator guide (5697-7344, March 2008)

348 Administering Advanced Performance Monitoring
NOTE: For end-to-end monitors, CRC counters are not displayed on the 4/8 SAN Switch, 4/16 SAN
Switch, SAN Switch 4/32, 4/64 SAN Switch, SAN Switch 4/32B, 400 Multi-protocol Router, 4/256 SAN
Director, and DC Director switches.
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.
4/8 SAN Switch and 4/16 SAN Switch models allow up to eight end-to-end monitors.
The SAN Switch 4/32, 4/64 SAN Switch, SAN Switch 4/32B, 400 Multi-protocol 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
DC Director allows up to 1024 end-to-end monitors. (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 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.
The monitor count is qualified using either of the 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 on the PID format
used by the fabric. See ”Configuring the PID Format” on page 489 for more information.
Figure 27 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 27 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 27, 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.
. . .
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