HP StorageWorks 2.128 SAN Director Switch - Manual (Page 206)

206 Administering advanced performance monitoring
• SAN Switch 4/32 (Fabric OS 4.4.0 or later): Up to 15 different offsets per port (14 offsets when FMS
is enabled)
• 4/8 SAN Switch, 4/16 SAN Switch, and Brocade 4Gb SAN Switch for HP p-Class BladeSystem
(Fabric OS 5.0.1): Up to 7 different offsets per port (6 offsets when fmsmode is enabled)
You can specify up to four values to compare against each offset. If more than one offset is required to
properly define a filter, the bytes found at each offset must match one of the given values for the filter to
increment its counter. If one or more of the given offsets does not match any of the given values, the
counter does not increment.
The value of the offset must be between 0 and 63, in decimal format. Byte 0 indicates the first byte of the
Start of Frame (SOF), byte 4 is the first byte of the frame header, and byte 28 is the first byte of the
payload. Thus, only the SOF, frame header, and first 36 bytes of payload can be selected as part of a
filter definition. Offset 0 is a special case, which can be used to monitor the first 4 bytes of the frame.
When the offset is set to 0, the values 0–7 that are checked against that offset are predefined, as shown
in Table 44 .
If the switch does not have sufficient resources to create a given filter, other filters might have to be
deleted to free resources.
Adding filter-based monitors
In the preceding example, two filter-based monitors are added. The first monitor (#5) counts all FCP and
IP frames transmitted from domain 0x02 for slot 4, port 2. The FCP and IP protocols are selected by
monitoring offset 12, mask 0xff and matching values of 0x05 or 0x08. Domain 2 is selected by
monitoring offset 9, mask 0xff, and matching a value of 0x02. The monitor counter is incremented for all
outgoing frames from port 2 where byte 9 is 0x02 and byte 12 is 0x05 or 0x08.
The second monitor (#6) is for SOFi3 on slot 1, port 2.
Deleting filter-based monitors
1. List the valid monitor numbers by entering the
perfShowFilterMonitor
command.
2. Issue the
perfDelFilterMonitor
command to delete a specific monitor. If you do not specify
which monitor number to delete, you are asked whether you want to delete all entries.
Table 44 Predefined values at offset 0
Value SOF Value SOF
0 SOFf 4 SOFi2
1 SOFc1 5 SOFn2
2 SOFi1 6 SOFi3
3 SOFn1 7 SOFn3
switch:admin> perfaddusermonitor 4/2, “12, 0xff, 0x05, 0x08; 9, 0xff, 0x02” “FCP/IP”
User monitor #5 added
switch:admin> perfaddusermonitor 1/2, “0, 0xff, 6"
User Monitor #6 added