testpmd> show port <TAB>
- info [Mul-choice STRING]: show|clear port info|stats|xstats|fdir|stat_qmap|dcb_tc X
- info [Mul-choice STRING]: show|clear port info|stats|xstats|fdir|stat_qmap|dcb_tc all
- stats [Mul-choice STRING]: show|clear port info|stats|xstats|fdir|stat_qmap|dcb_tc X
- stats [Mul-choice STRING]: show|clear port info|stats|xstats|fdir|stat_qmap|dcb_tc all
+ info [Mul-choice STRING]: show|clear port info|stats|xstats|fdir|dcb_tc|cap X
+ info [Mul-choice STRING]: show|clear port info|stats|xstats|fdir|dcb_tc|cap all
+ stats [Mul-choice STRING]: show|clear port info|stats|xstats|fdir|dcb_tc|cap X
+ stats [Mul-choice STRING]: show|clear port info|stats|xstats|fdir|dcb_tc|cap all
...
Display information for a given port or all ports::
- testpmd> show port (info|summary|stats|xstats|fdir|stat_qmap|dcb_tc) (port_id|all)
+ testpmd> show port (info|summary|stats|xstats|fdir|dcb_tc|cap) (port_id|all)
The available information categories are:
* ``fdir``: Flow Director information and statistics.
-* ``stat_qmap``: Queue statistics mapping.
-
* ``dcb_tc``: DCB information such as TC mapping.
For example:
Clear the port statistics and forward engine statistics for a given port or for all ports::
- testpmd> clear port (info|stats|xstats|fdir|stat_qmap) (port_id|all)
+ testpmd> clear port (info|stats|xstats|fdir) (port_id|all)
For example::
Set the packet forwarding mode::
testpmd> set fwd (io|mac|macswap|flowgen| \
- rxonly|txonly|csum|icmpecho|noisy|5tswap) (""|retry)
+ rxonly|txonly|csum|icmpecho|noisy|5tswap|shared-rxq) (""|retry)
``retry`` can be specified for forwarding engines except ``rx_only``.
L4 swaps the source port and destination port of transport layer (TCP and UDP).
+* ``shared-rxq``: Receive only for shared Rx queue.
+ Resolve packet source port from mbuf and update stream statistics accordingly.
+
Example::
testpmd> set fwd rxonly
* ``autoneg``: Change the auto-negotiation parameter.
+show flow control
+~~~~~~~~~~~~~~~~~
+
+show the link flow control parameter on a port::
+
+ testpmd> show port <port_id> flow_ctrl
+
set pfc_ctrl rx
~~~~~~~~~~~~~~~
testpmd> set port (port_id) vf (vf_id) rate (rate_value) queue_mask (queue_mask)
-set port - mirror rule
-~~~~~~~~~~~~~~~~~~~~~~
-
-Set pool or vlan type mirror rule for a port::
-
- testpmd> set port (port_id) mirror-rule (rule_id) \
- (pool-mirror-up|pool-mirror-down|vlan-mirror) \
- (poolmask|vlanid[,vlanid]*) dst-pool (pool_id) (on|off)
-
-Set link mirror rule for a port::
-
- testpmd> set port (port_id) mirror-rule (rule_id) \
- (uplink-mirror|downlink-mirror) dst-pool (pool_id) (on|off)
-
-For example to enable mirror traffic with vlan 0,1 to pool 0::
-
- set port 0 mirror-rule 0 vlan-mirror 0,1 dst-pool 0 on
-
-reset port - mirror rule
-~~~~~~~~~~~~~~~~~~~~~~~~
-
-Reset a mirror rule for a port::
-
- testpmd> reset port (port_id) mirror-rule (rule_id)
-
set flush_rx
~~~~~~~~~~~~
Where:
-* ``valid_only``: A flag indicates if only list valid items(=1) or all itemss(=0).
+* ``valid_only``: A flag indicates if only list valid items(=1) or all items(=0).
Replace a specific or a group of software defined ptype with a new one::
ipv6-udp-ex <string of hex digits \
(variable length, NIC dependent)>)
+port cleanup txq mbufs
+~~~~~~~~~~~~~~~~~~~~~~
+
+To cleanup txq mbufs currently cached by driver::
+
+ testpmd> port cleanup (port_id) txq (queue_id) (free_cnt)
+
+If the value of ``free_cnt`` is 0, driver should free all cached mbufs.
+
Device Functions
----------------
Active Slaves (3): [1 3 4]
Primary: [3]
+show bonding lacp info
+~~~~~~~~~~~~~~~~~~~~~~
+
+Show information about the Link Bonding device in mode 4 (link-aggregation-802.3ad)::
+
+ testpmd> show bonding lacp info (port_id)
Register Functions
------------------
testpmd> del port meter profile (port_id) (profile_id)
+create port policy
+~~~~~~~~~~~~~~~~~~
+
+Create new policy object for the ethernet device::
+
+ testpmd> add port meter policy (port_id) (policy_id) g_actions \
+ {action} y_actions {action} r_actions {action}
+
+where:
+
+* ``policy_id``: policy ID.
+* ``action``: action lists for green/yellow/red colors.
+
+delete port policy
+~~~~~~~~~~~~~~~~~~
+
+Delete policy object for the ethernet device::
+
+ testpmd> del port meter policy (port_id) (policy_id)
+
+where:
+
+* ``policy_id``: policy ID.
+
create port meter
~~~~~~~~~~~~~~~~~
Create new meter object for the ethernet device::
testpmd> create port meter (port_id) (mtr_id) (profile_id) \
- (meter_enable) (g_action) (y_action) (r_action) (stats_mask) (shared) \
+ (policy_id) (meter_enable) (stats_mask) (shared) \
(use_pre_meter_color) [(dscp_tbl_entry0) (dscp_tbl_entry1)...\
(dscp_tbl_entry63)]
* ``mtr_id``: meter object ID.
* ``profile_id``: ID for the meter profile.
+* ``policy_id``: ID for the policy.
* ``meter_enable``: When this parameter has a non-zero value, the meter object
gets enabled at the time of creation, otherwise remains disabled.
-* ``g_action``: Policer action for the packet with green color.
-* ``y_action``: Policer action for the packet with yellow color.
-* ``r_action``: Policer action for the packet with red color.
* ``stats_mask``: Mask of statistics counter types to be enabled for the
meter object.
* ``shared``: When this parameter has a non-zero value, the meter object is
testpmd> set port meter dscp table (port_id) (mtr_id) [(dscp_tbl_entry0) \
(dscp_tbl_entry1)...(dscp_tbl_entry63)]
-set port meter policer action
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Set meter policer action for the ethernet device::
-
- testpmd> set port meter policer action (port_id) (mtr_id) (action_mask) \
- (action0) [(action1) (action1)]
-
-where:
-
-* ``action_mask``: Bit mask indicating which policer actions need to be
- updated. One or more policer actions can be updated in a single function
- invocation. To update the policer action associated with color C, bit
- (1 << C) needs to be set in *action_mask* and element at position C
- in the *actions* array needs to be valid.
-* ``actionx``: Policer action for the color x,
- RTE_MTR_GREEN <= x < RTE_MTR_COLORS
-
set port meter stats mask
~~~~~~~~~~~~~~~~~~~~~~~~~
- Dump internal representation information of all flows in hardware::
- flow dump {port_id} {output_file}
+ flow dump {port_id} all {output_file}
+
+ for one flow::
+
+ flow dump {port_id} rule {rule_id} {output_file}
- List and destroy aged flow rules::
- ``ipv4``: match IPv4 header.
+ - ``version_ihl {unsigned}``: IPv4 version and IP header length.
- ``tos {unsigned}``: type of service.
- ``ttl {unsigned}``: time to live.
- ``proto {unsigned}``: next protocol ID.
- ``vxlan``: match VXLAN header.
- ``vni {unsigned}``: VXLAN identifier.
+ - ``last_rsvd {unsigned}``: VXLAN last reserved 8-bits.
- ``e_tag``: match IEEE 802.1BR E-Tag header.
- ``gtp_psc``: match GTP PDU extension header with type 0x85.
- ``pdu_type {unsigned}``: PDU type.
+
- ``qfi {unsigned}``: QoS flow identifier.
- ``pppoes``, ``pppoed``: match PPPoE header.
- ``s_field {unsigned}``: S field.
- ``seid {unsigned}``: session endpoint identifier.
+- ``integrity``: match packet integrity.
+
+ - ``level {unsigned}``: Packet encapsulation level the item should
+ apply to. See rte_flow_action_rss for details.
+ - ``value {unsigned}``: A bitmask that specify what packet elements
+ must be matched for integrity.
+
+- ``conntrack``: match conntrack state.
+
+- ``port_representor``: match traffic entering the embedded switch from the given ethdev
+
+ - ``port_id {unsigned}``: ethdev port ID
+
+- ``represented_port``: match traffic entering the embedded switch from
+ the entity represented by the given ethdev
+
+ - ``ethdev_port_id {unsigned}``: ethdev port ID
+
+- ``l2tpv2``: match L2TPv2 header.
+
+ - ``length {unsigned}``: L2TPv2 option length.
+ - ``tunnel_id {unsigned}``: L2TPv2 tunnel identifier.
+ - ``session_id {unsigned}``: L2TPv2 session identifier.
+ - ``ns {unsigned}``: L2TPv2 option ns.
+ - ``nr {unsigned}``: L2TPv2 option nr.
+
+- ``ppp``: match PPP header.
+
+ - ``addr {unsigned}``: PPP address.
+ - ``ctrl {unsigned}``: PPP control.
+ - ``proto_id {unsigned}``: PPP protocol identifier.
+
Actions list
^^^^^^^^^^^^
- ``dscp_value {unsigned}``: The new DSCP value to be set
-- ``shared``: Use shared action created via
- ``flow shared_action {port_id} create``
+- ``indirect``: Use indirect action created via
+ ``flow indirect_action {port_id} create``
+
+ - ``indirect_action_id {unsigned}``: Indirect action ID to use
+
+- ``color``: Color the packet to reflect the meter color result
+
+ - ``type {value}``: Set color type with specified value(green/yellow/red)
+
+- ``port_representor``: at embedded switch level, send matching traffic to
+ the given ethdev
+
+ - ``port_id {unsigned}``: ethdev port ID
+
+- ``represented_port``: at embedded switch level, send matching traffic to
+ the entity represented by the given ethdev
- - ``shared_action_id {unsigned}``: Shared action ID to use
+ - ``ethdev_port_id {unsigned}``: ethdev port ID
Destroying flow rules
~~~~~~~~~~~~~~~~~~~~~
testpmd> flow aged 0
Port 0 total aged flows: 0
-Creating shared actions
-~~~~~~~~~~~~~~~~~~~~~~~
-``flow shared_action {port_id} create`` creates shared action with optional
-shared action ID. It is bound to ``rte_flow_shared_action_create()``::
+Creating indirect actions
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``flow indirect_action {port_id} create`` creates indirect action with optional
+indirect action ID. It is bound to ``rte_flow_action_handle_create()``::
- flow shared_action {port_id} create [action_id {shared_action_id}]
+ flow indirect_action {port_id} create [action_id {indirect_action_id}]
[ingress] [egress] [transfer] action {action} / end
If successful, it will show::
- Shared action #[...] created
+ Indirect action #[...] created
-Otherwise, it will complain either that shared action already exists or that
+Otherwise, it will complain either that indirect action already exists or that
some error occurred::
- Shared action #[...] is already assigned, delete it first
+ Indirect action #[...] is already assigned, delete it first
::
Caught error type [...] ([...]): [...]
-Create shared rss action with id 100 to queues 1 and 2 on port 0::
+Create indirect rss action with id 100 to queues 1 and 2 on port 0::
- testpmd> flow shared_action 0 create action_id 100 \
+ testpmd> flow indirect_action 0 create action_id 100 \
ingress action rss queues 1 2 end / end
-Create shared rss action with id assigned by testpmd to queues 1 and 2 on
+Create indirect rss action with id assigned by testpmd to queues 1 and 2 on
port 0::
- testpmd> flow shared_action 0 create action_id \
+ testpmd> flow indirect_action 0 create action_id \
ingress action rss queues 0 1 end / end
-Updating shared actions
-~~~~~~~~~~~~~~~~~~~~~~~
-``flow shared_action {port_id} update`` updates configuration of the shared
-action from its shared action ID (as returned by
-``flow shared_action {port_id} create``). It is bound to
-``rte_flow_shared_action_update()``::
+Updating indirect actions
+~~~~~~~~~~~~~~~~~~~~~~~~~
- flow shared_action {port_id} update {shared_action_id}
+``flow indirect_action {port_id} update`` updates configuration of the indirect
+action from its indirect action ID (as returned by
+``flow indirect_action {port_id} create``). It is bound to
+``rte_flow_action_handle_update()``::
+
+ flow indirect_action {port_id} update {indirect_action_id}
action {action} / end
If successful, it will show::
- Shared action #[...] updated
+ Indirect action #[...] updated
-Otherwise, it will complain either that shared action not found or that some
+Otherwise, it will complain either that indirect action not found or that some
error occurred::
- Failed to find shared action #[...] on port [...]
+ Failed to find indirect action #[...] on port [...]
::
Caught error type [...] ([...]): [...]
-Update shared rss action having id 100 on port 0 with rss to queues 0 and 3
+Update indirect rss action having id 100 on port 0 with rss to queues 0 and 3
(in create example above rss queues were 1 and 2)::
- testpmd> flow shared_action 0 update 100 action rss queues 0 3 end / end
+ testpmd> flow indirect_action 0 update 100 action rss queues 0 3 end / end
-Destroying shared actions
-~~~~~~~~~~~~~~~~~~~~~~~~~
-``flow shared_action {port_id} update`` destroys one or more shared actions
-from their shared action IDs (as returned by
-``flow shared_action {port_id} create``). It is bound to
-``rte_flow_shared_action_destroy()``::
+Destroying indirect actions
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``flow indirect_action {port_id} destroy`` destroys one or more indirect actions
+from their indirect action IDs (as returned by
+``flow indirect_action {port_id} create``). It is bound to
+``rte_flow_action_handle_destroy()``::
- flow shared_action {port_id} destroy action_id {shared_action_id} [...]
+ flow indirect_action {port_id} destroy action_id {indirect_action_id} [...]
If successful, it will show::
- Shared action #[...] destroyed
+ Indirect action #[...] destroyed
-It does not report anything for shared action IDs that do not exist.
-The usual error message is shown when a shared action cannot be destroyed::
+It does not report anything for indirect action IDs that do not exist.
+The usual error message is shown when a indirect action cannot be destroyed::
Caught error type [...] ([...]): [...]
-Destroy shared actions having id 100 & 101::
+Destroy indirect actions having id 100 & 101::
- testpmd> flow shared_action 0 destroy action_id 100 action_id 101
+ testpmd> flow indirect_action 0 destroy action_id 100 action_id 101
-Query shared actions
-~~~~~~~~~~~~~~~~~~~~
-``flow shared_action {port_id} query`` queries the shared action from its
-shared action ID (as returned by ``flow shared_action {port_id} create``).
-It is bound to ``rte_flow_shared_action_query()``::
+Query indirect actions
+~~~~~~~~~~~~~~~~~~~~~~
+
+``flow indirect_action {port_id} query`` queries the indirect action from its
+indirect action ID (as returned by ``flow indirect_action {port_id} create``).
+It is bound to ``rte_flow_action_handle_query()``::
- flow shared_action {port_id} query {shared_action_id}
+ flow indirect_action {port_id} query {indirect_action_id}
-Currently only rss shared action supported. If successful, it will show::
+Currently only rss indirect action supported. If successful, it will show::
- Shared RSS action:
+ Indirect RSS action:
refs:[...]
-Otherwise, it will complain either that shared action not found or that some
+Otherwise, it will complain either that indirect action not found or that some
error occurred::
- Failed to find shared action #[...] on port [...]
+ Failed to find indirect action #[...] on port [...]
::
Caught error type [...] ([...]): [...]
-Query shared action having id 100::
+Query indirect action having id 100::
- testpmd> flow shared_action 0 query 100
+ testpmd> flow indirect_action 0 query 100
Sample QinQ flow rules
~~~~~~~~~~~~~~~~~~~~~~
Raw encapsulation configuration can be set by the following commands
-Eecapsulating VxLAN::
+Encapsulating VxLAN::
testpmd> set raw_encap 4 eth src is 10:11:22:33:44:55 / vlan tci is 1
inner_type is 0x0800 / ipv4 / udp dst is 4789 / vxlan vni
testpmd> flow create 0 ingress transfer pattern eth / end actions
sample ratio 1 index 0 / port_id id 2 / end
+Sample integrity rules
+~~~~~~~~~~~~~~~~~~~~~~
+
+Integrity rules can be created by the following commands:
+
+Integrity rule that forwards valid TCP packets to group 1.
+TCP packet integrity is matched with the ``l4_ok`` bit 3.
+
+::
+
+ testpmd> flow create 0 ingress
+ pattern eth / ipv4 / tcp / integrity value mask 8 value spec 8 / end
+ actions jump group 1 / end
+
+Integrity rule that forwards invalid packets to application.
+General packet integrity is matched with the ``packet_ok`` bit 0.
+
+::
+
+ testpmd> flow create 0 ingress pattern integrity value mask 1 value spec 0 / end actions queue index 0 / end
+
+Sample conntrack rules
+~~~~~~~~~~~~~~~~~~~~~~
+
+Conntrack rules can be set by the following commands
+
+Need to construct the connection context with provided information.
+In the first table, create a flow rule by using conntrack action and jump to
+the next table. In the next table, create a rule to check the state.
+
+::
+
+ testpmd> set conntrack com peer 1 is_orig 1 enable 1 live 1 sack 1 cack 0
+ last_dir 0 liberal 0 state 1 max_ack_win 7 r_lim 5 last_win 510
+ last_seq 2632987379 last_ack 2532480967 last_end 2632987379
+ last_index 0x8
+ testpmd> set conntrack orig scale 7 fin 0 acked 1 unack_data 0
+ sent_end 2632987379 reply_end 2633016339 max_win 28960
+ max_ack 2632987379
+ testpmd> set conntrack rply scale 7 fin 0 acked 1 unack_data 0
+ sent_end 2532480967 reply_end 2532546247 max_win 65280
+ max_ack 2532480967
+ testpmd> flow indirect_action 0 create ingress action conntrack / end
+ testpmd> flow create 0 group 3 ingress pattern eth / ipv4 / tcp / end actions indirect 0 / jump group 5 / end
+ testpmd> flow create 0 group 5 ingress pattern eth / ipv4 / tcp / conntrack is 1 / end actions queue index 5 / end
+
+Construct the conntrack again with only "is_orig" set to 0 (other fields are
+ignored), then use "update" interface to update the direction. Create flow
+rules like above for the peer port.
+
+::
+
+ testpmd> flow indirect_action 0 update 0 action conntrack_update dir / end
+
+Sample meter with policy rules
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Meter with policy rules can be created by the following commands:
+
+Need to create policy first and actions are set for green/yellow/red colors.
+Create meter with policy id. Create flow with meter id.
+
+Example for policy with meter color action. The purpose is to color the packet
+to reflect the meter color result.
+The meter policy action list: ``green -> green, yellow -> yellow, red -> red``.
+
+::
+
+ testpmd> add port meter profile srtcm_rfc2697 0 13 21504 2688 0 0
+ testpmd> add port meter policy 0 1 g_actions color type green / end y_actions color type yellow / end
+ r_actions color type red / end
+ testpmd> create port meter 0 1 13 1 yes 0xffff 0 0
+ testpmd> flow create 0 priority 0 ingress group 1 pattern eth / end actions meter mtr_id 1 / end
+
+Sample PPPoL2TPv2oUDP RSS rules
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+PPPoL2TPv2oUDP RSS rules can be created by the following commands::
+
+ testpmd> flow create 0 ingress pattern eth / ipv4 / udp / l2tpv2 / ppp / ipv4
+ / end actions rss types ipv4 end queues end / end
+ testpmd> flow create 0 ingress pattern eth / ipv4 / udp / l2tpv2 / ppp / ipv6
+ / udp / end actions rss types ipv6-udp end queues end / end
+ testpmd> flow create 0 ingress pattern eth / ipv6 / udp / l2tpv2 / ppp / ipv4
+ / tcp / end actions rss types ipv4-tcp end queues end / end
+ testpmd> flow create 0 ingress pattern eth / ipv6 / udp / l2tpv2 / ppp / ipv6
+ / end actions rss types ipv6 end queues end / end
+
BPF Functions
--------------
.. code-block:: console
testpmd> bpf-unload tx 0 0
+
+Flex Item Functions
+-------------------
+
+The following sections show functions that configure and create flex item object,
+create flex pattern and use it in a flow rule.
+The commands will use 20 bytes IPv4 header for examples:
+
+::
+
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | ver | IHL | TOS | length | +0
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | identification | flg | frag. offset | +4
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | TTL | protocol | checksum | +8
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | source IP address | +12
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | destination IP address | +16
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+
+Create flex item
+~~~~~~~~~~~~~~~~
+
+Flex item object is created by PMD according to a new header configuration. The
+header configuration is compiled by the testpmd and stored in
+``rte_flow_item_flex_conf`` type variable.
+
+::
+
+ # flow flex_item create <port> <flex id> <configuration file>
+ testpmd> flow flex_item init 0 3 ipv4_flex_config.json
+ port-0: created flex item #3
+
+Flex item configuration is kept in external JSON file.
+It describes the following header elements:
+
+**New header length.**
+
+Specify whether the new header has fixed or variable length and the basic/minimal
+header length value.
+
+If header length is not fixed, header location with a value that completes header
+length calculation and scale/offset function must be added.
+
+Scale function depends on port hardware.
+
+**Next protocol.**
+
+Describes location in the new header that specify following network header type.
+
+**Flow match samples.**
+
+Describes locations in the new header that will be used in flow rules.
+
+Number of flow samples and sample maximal length depend of port hardware.
+
+**Input trigger.**
+
+Describes preceding network header configuration.
+
+**Output trigger.**
+
+Describes conditions that trigger transfer to following network header
+
+.. code-block:: json
+
+ {
+ "next_header": { "field_mode": "FIELD_MODE_FIXED", "field_size": 20},
+ "next_protocol": {"field_size": 8, "field_base": 72},
+ "sample_data": [
+ { "field_mode": "FIELD_MODE_FIXED", "field_size": 32, "field_base": 0},
+ { "field_mode": "FIELD_MODE_FIXED", "field_size": 32, "field_base": 32},
+ { "field_mode": "FIELD_MODE_FIXED", "field_size": 32, "field_base": 64},
+ { "field_mode": "FIELD_MODE_FIXED", "field_size": 32, "field_base": 96}
+ ],
+ "input_link": [
+ {"item": "eth type is 0x0800"},
+ {"item": "vlan inner_type is 0x0800"}
+ ],
+ "output_link": [
+ {"item": "udp", "next": 17},
+ {"item": "tcp", "next": 6},
+ {"item": "icmp", "next": 1}
+ ]
+ }
+
+
+Flex pattern and flow rules
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Flex pattern describe parts of network header that will trigger flex flow item hit in a flow rule.
+Flex pattern directly related to flex item samples configuration.
+Flex pattern can be shared between ports.
+
+**Flex pattern and flow rule to match IPv4 version and 20 bytes length**
+
+::
+
+ # set flex_pattern <pattern_id> is <hex bytes sequence>
+ testpmd> flow flex_item pattern 5 is 45FF
+ created pattern #5
+
+ testpmd> flow create 0 ingress pattern eth / ipv4 / udp / flex item is 3 pattern is 5 / end actions mark id 1 / queue index 0 / end
+ Flow rule #0 created
+
+**Flex pattern and flow rule to match packets with source address 1.2.3.4**
+
+::
+
+ testpmd> flow flex_item pattern 2 spec 45000000000000000000000001020304 mask FF0000000000000000000000FFFFFFFF
+ created pattern #2
+
+ testpmd> flow create 0 ingress pattern eth / ipv4 / udp / flex item is 3 pattern is 2 / end actions mark id 1 / queue index 0 / end
+ Flow rule #0 created