sw1:admin> perfAddReadMonitor 2
SCSI Read filter monitor #0 added
sw1:admin> perfAddWriteMonitor 2
SCSI Write monitor #1 added
sw1:admin> perfAddRWMonitor 2
SCSI Read/Write monitor #2 is added
sw1:admin> perfAddSCSIMonitor 2
SCSI traffic frame monitor #3 added
sw1:admin> perfAddIPMonitor 2,
IP traffic frame monitor #4 added
sw1:admin> perfShowFilterMonitor 2
There are 5 filter-based monitors defined on port 2.
KEY
----------------------------------------------------------------
0
1
2
3
4
Adding User-Defined Filter-Based Monitors
In addition to the standard filters (read, write, read/write, and frame count), you can create custom
filters to qualify frames for statistics gathering to fit your own special needs.
To define a custom filter, use the perfAddUserMonitor telnet command. With this command, you
must specify a series of offsets, masks, and values. The following actions are performed. For all
incoming frames, the switch:
•
locates the byte found in the frame at the specified offset
•
applies the mask to the byte found in the frame
•
compares the value with the given values in the perfAddUserMonitor command
•
increments the filter counter if a match is found
You can specify up to six different offsets for each port, and 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 0 or must be between 4–63, 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 may 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 (SOF). When
the offset is 0, the values are from 0–7, indicating the following:
Advanced Performance Monitoring User's Guide
ALIAS
OWNER_APP
SCSI_RD
TELNET
SCSI_WR
TELNET
SCSI_RW
TELNET
SCSI_Frame TELNET
IP_Frame
TELNET
Using Advanced Performance Monitoring
OWNER_IP_ADDR
FRAME_COUNT
N/A
0x0000000000000000
N/A
0x0000000000000000
N/A
0x0000000000000000
N/A
0x0000000000000000
N/A
0x0000000000000000
3
3-9
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