Brocade Fabric OS Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 110)

1. Connect to the switch and log in using an account with admin permissions.
2. Enter the iodReset command.
Enabling Frame Viewer
The Frame Viewer application allows you to view the contents of discarded frames, which can be
recorded at up to 40 frames per second per ASIC.
To enable Frame Viewer, complete the following steps.
1. Connect to the switch and log in using an account with admin permissions.
2. Enter frameLog --enable -type type.
The following table lists the supported values for type. If the -type option is not provided, the all
three discard frame types will be recorded.
Option Description
timeout Due to timeout.
du Due to destination unreachable.
unroute Due to unrouteable frame.
3. Use the frameLog --status command to view the configuration. The following is a typical example
of the output of this command:
switch:admin> framelog --status
Service Status: Enabled
Enabled Disc Frame Types: timeout unroute
NOTE
Frame viewing for unrouteable and “destination unreachable” frames is supported only on the
following devices:
• Brocade 6505, 6510, 6520, DCX 8510-4 and DCX 8510-8 switches.
• Brocade CR16-4, CR16-8, FC8-32E, FC8-48E, FC16-32, FC16-48, FC16-64 blades. If a chassis
has any older blades, only the timeout frames will be captured for those blades.
Using Frame Viewer to understand why frames are dropped
When a frame is unable to reach its destination because of a timeout, is unroutable, or has an
unreachable destination, it is discarded. You can use Frame Viewer to find out which flows contained
the dropped frames, which in turn can help you determine the applications that might be impacted.
Frame Viewer allows you to see the exact time (within one second) that the frames were dropped.
You can view up to 40 discarded frames per ASIC per second for 1200 seconds with the frameLog
command. You filter this view using a number of fields to filter this output so you are viewing only
those frames you are concerned with.
NOTE
Frame viewing for “unrouteable” and “destination unreachable” frames is supported only on the
following devices:
Enabling Frame Viewer
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