`ASF`

ASF (cut-through) Mode

Show the cut-through (Alternate Store and Forward, ASF) configuration of ports and its diagnostics. To change the mode of a port, use PORT PBMP asf.

The first word is show or diag, typed in full; anything else prints error: incorrect argument. Both need a port bitmap (see Ports and port bitmaps); an empty bitmap prints nothing. On chips without multi-mode cut-through the command prints ASF: Command not implemented.

Both forms only read state and are safe on a running switch. On a SONiC Trident 3 switch with the default configuration every port shows SAF (store-and-forward) with no cut-through speed range (.. NA ..).

Hardware-validated

drivshell> asf show ce
         cut-through      cut-through speed
port        mode          range (from/to)
ce0       SAF                  .. NA ..
ce1       SAF                  .. NA ..
ce2       SAF                  .. NA ..
ce3       SAF                  .. NA ..
ce4       SAF                  .. NA ..
ce5       SAF                  .. NA ..
ce6       SAF                  .. NA ..
ce7       SAF                  .. NA ..
ce8       SAF                  .. NA ..
ce9       SAF                  .. NA ..
ce10      SAF                  .. NA ..
ce11      SAF                  .. NA ..
ce12      SAF                  .. NA ..
ce13      SAF                  .. NA ..
ce14      SAF                  .. NA ..
ce15      SAF                  .. NA ..
ce16      SAF                  .. NA ..
ce17      SAF                  .. NA ..
ce18      SAF                  .. NA ..
ce19      SAF                  .. NA ..
ce20      SAF                  .. NA ..
ce21      SAF                  .. NA ..
ce22      SAF                  .. NA ..
ce23      SAF                  .. NA ..
ce24      SAF                  .. NA ..
ce25      SAF                  .. NA ..
ce26      SAF                  .. NA ..
ce27      SAF                  .. NA ..
ce28      SAF                  .. NA ..
ce29      SAF                  .. NA ..
ce30      SAF                  .. NA ..

ASF show <pbmp>

Print, per port, the cut-through mode and the speed range (from/to) for which cut-through applies, under a two-line header ending in port mode range (from/to).

Hardware-validated

drivshell> asf show ce0
         cut-through      cut-through speed
port        mode          range (from/to)
ce0       SAF                  .. NA ..

ASF diag <pbmp>

Print per-port cut-through details: mode, class, minimum and maximum source port speed, FIFO threshold and depth, transmit start count per source class, MMU prebuffer, MMU and egress credits, and RX pause. A legend explaining the column abbreviations follows the table.

Unvalidated

drivshell> asf diag ce0

Built-in help

ASF Configurations Summary & Diagnostics.
Parameters: [show | diag] <pbmp>
Example: asf show [ce0 | hg1 | ce,hg]
Example: asf diag [ce0 | hg1 | ce,hg]
<pbmp> is a standard port bitmap (see "help pbmp").
To configure ASF on port(s), use 'port <pbmp> asf <mode>' command

ASF

`ASF`