Configuring a Flow With a Group of Flow Filters

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In addition to configuring a flow that consists of one flow filter (tuple of L3/L4 attribute), you can now configure a flow that consist of multiple flow filters. The resource control properties apply only to the flow. You must define all the filters for a flow with the same combination of attributes. You use the flowadm and flowstat commands to manage and display the flow filters. Typically, flow filters are created from an application by using the flow socket APIs. Hence, the CLI support is mainly useful for observability.

Viewing Flow Filter Information

To view a flow filter, use any of the following command syntaxes:

# flowadm show-filter flow-name
# flowadm show-flow -v

The following example shows how to display the filters that are added by an application.

$ nc -M flow=webserver 203.0.113.10/27 80 &
$ nc -M flow=webserver 203.0.113.10/27 8080 &

Use any of the following commands to view the flow filters:

$ flowadm show-filter webserver
FILTER      PROTO LADDR           LPORT RADDR           RPORT DIR  _HWFILTER
webserver@2 tcp   203.0.113.65/27 38016 203.0.113.10/27 8080  bi    off
webserver@1 tcp   203.0.113.65/27 36172 203.0.113.10/27 80    bi    off

$ flowadm show-flow -v
FLOW           LINK PROTO LADDR           LPORT RADDR           RPORT DIR
webserver      net4 --     --        --    --         --    --
   webserver@2 net0 tcp   203.0.113.65/27 38016 203.0.113.10/27 8080  bi
   webserver@1 net0 tcp   203.0.113.65/27 36172 203.0.113.10/27 80    bi

You can also use the flowstat command to display the statistics of the flow filters.

For example,

$ flowstat -v
FLOW        IPKTS RBYTES IDROPS OPKTS OBYTES ODROPS
webserver   26    1.74K   25     24    1.61K  0
webserver@2 16    1.07K   13     15    1.00K  0
webserver@1 10     674     12     9     602   0

For information about how to add or remove a flow filter, see the flowadm(8) man page. For more information about flow statistics, see the flowstat(8) man page.

Creating a Flow Without a Filter

You might need to create a flow without any filter, that is, without any attributes for some applications. The application adds the flow filters dynamically and you can configure SLAs for the flow.

This example consists of the creation of a filterless flow and the subsequent setup of a flow property.

$ flowadm add-flow -l net4 webserver
$ flowadm
FLOW LINK PROTO LADDR LPORT RADDR RPORT DIR
webserver net4   --   --    --    --    bi

$ flowadm set-flowprop -p max-bw=1G webserver
$ flowadm show-flowprop -p max-bw
FLOW     PROPERTY PERM VALUE EFFECTIVE  DEFAULT POSSIBLE
ebserver max-bw   rw   1000  1000       --      --