Using Frame Viewer To Understand Why Frames Are Dropped - HP StoreFabric SN6500B Administrator's Manual

4
Frame order delivery

Using Frame Viewer to understand why frames are dropped

When a frame is unable to reach its destination due to timeout, it is discarded. You can use
Frame Viewer to find out which flows contained the dropped frames, which in turn can help you
determine which applications might be impacted. Frame Viewer allows you to see the exact time
(within one second) that the frames were dropped.
You can view and filter up to 20 discarded frames per chip per second for 1200 seconds using a
number of fields with the frameLog command.
Use the following procedure to view frames.
1. Connect to the switch and log in using an account with admin permissions.
2. Type frameLog --show.
Example output of
EDCX16_114064:root> framelog --show
==================================================================================================
Fri Jul 13 23:47:08 UTC 2012
==================================================================================================
Log TX
timestamp port
===============================================================================================
Jul 13 23:47:07 11/45
Jul 13 23:47:07 11/45
Jul 13 23:47:07 11/45
Jul 13 23:47:07 11/45
Jul 13 23:47:07 11/45
Notes
The output of --show displays the type of each discard.
Syntax
framelog --show [-type <discard_type>] [-txport <[slot/]port>] [-rxport
<[slot/]port>] [-sid <source_PID>] [-did <destination_PID>] [-sfid <source_FID>]
[-dfid <destination_FID>] [-mode summary | dump] [-n <num_items>]
Constraints
The following constraint applies to the frameLog --show command:
•
Filtering Results by Back-End Port in Frame Viewer
The Frame Viewer --show command supports specifying that the TX port or RX port of displayed
frames should be a back-end port. To filter by TX port or RX port, you issue a command like:
framelog --show -txport [<slot>/]<port>
or
framelog --show -rxport [<slot>/]<port>
or
framelog --show -txport [<slot>/]<port> -rxport [<slot>/]<port>
124
framelog --show
RX
port SID
11/45 0xfffffd
11/45 0xfffffc
11/45 0xfffffc
11/45 0xfffc40
11/45 0xfffc40
The -type option requires an argument; currently only timeout is supported, this specifies that
only timeout discards be shown
DID SFID
0x40e580 0
0x40e580 0
0x40e580 0
0x40e580 0
0x40e580 0
DFID Type
0 timeout
0 timeout
0 timeout
0 timeout
0 timeout
Fabric OS Administrator's Guide
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