P4 PI库安装

repo：Github PI

P4Runtime - a control plane framework and tools for the P4 programming language

这个是P4社区目前正在开发的一个repo，根据它给的介绍，是一个控制平面的架构，提供了管理P4交换机的工具。接下来持续跟进它。

首先要安装相关依赖：

sudo apt-get install libjudy-dev libreadline-dev

git submodule update --init --recursive

配置：

./autogen.sh
./configure [--with-bmv2] [--with-proto]

如果安装了bmv2，加上--with-bmv2；如果要使用p4runtime.proto 则需要安装Google的protobuf。

使用bmv2参数配置信息如下：

Features recap ......................................
Compile for bmv2 ............................. : yes
  simple_switch found ........................ : yes
Compile C++ frontend ......................... : no
Compile p4runtime.proto and associated fe .... : no
Compile internal RPC ......................... : yes
Compile PI C CLI ............................. : yes

make

make不报错则证明安装成功了。

实验

Terminal A：

simple_switch tests/testdata/simple_router.json

启动交换机；

Terminal B：

./CLI/pi_CLI_bmv2 -c tests/testdata/simple_router.json

启动CLI；

在CLI中可以对交换机进行相关配置：

PI CLI> assign_device 0 -- port=9090
Device assigned successfully.
Selecting device.
PI CLI> table_add ipv4_lpm 10.0.0.1/24 => set_nhop 10.0.0.1 1
Entry was successfully added with handle 0.
PI CLI> table_dump ipv4_lpm
Successfully retrieved 1 entrie(s).
==========
TABLE ENTRIES
**********
Dumping entry 0
Match key:
* ipv4.dstAddr        : LPM       0a000001/24
Action entry: set_nhop - 0a000001, 0001
==========
Dumping default entry
EMPTY
==========
PI CLI> table_delete ipv4_lpm 0
Entry with handle 0 was successfully removed.
PI CLI> 

PI CLI> help
commands             description

quit                 Exits CLI
help                 Print this message
add_p4               Add a P4 configuration and receive an ID for it, default config type is bmv2: add_p4 <path_to_config> [bmv2|native]*
assign_device        Assign a specific device, if no device selected currently, it will select the newly device: assign_device <device_id> [p4_config_id] [-- [key=v;]*]
select_device        Select a specific device by id, the device must have been assigned previously: select_device <device_id>
remove_device        Remove a specific device: remove_device <device_id>
show_devices         Show known devices, with available information: show_devices
update_device_start  Update the P4 config on the selected device, update_device_start <p4_config_id> <device_data_path>
update_device_end    End the P4 config update sequence on the selected device, update_device_start
table_add            Add entry to a match table: table_add <table name> <match fields> [priority] => [<action name> <action parameters> | <indirect handle>]
table_delete         Delete entry from a match table: table_delete <table name> <entry handle>
table_delete_wkey    Delete entry from a match table using the match key: table_delete_wkey <table name> <match fields> [priority]
table_modify         Modify entry in a match table: table_modify <table name> <entry_handle> => [<action name> <action parameters> | <indirect handle>]
table_modify_wkey    Modify entry in a match table using the match key: table_modify_wkey <table name> <match fields> [priority] => [<action name> <action parameters> | <indirect handle>]
table_set_default    Set default entry in a match table: table_set_default <table name> [<action name> <action parameters> | <indirect handle>]
table_dump           Dump all entries in a match table: table_dump <table name>
act_prof_create_member Add a member to an action profile: act_prof_create_member <act_prof_name> <action_name> [action parameters]
act_prof_create_group Add group to an action profile: act_prof_create_group <act_prof_name> [grp_size = 120]
act_prof_add_member_to_group Add member to a group in an action profile: act_prof_add_member_to_group <act_prof_name> <mbr_h> <grp_h>
act_prof_dump        Dump entries of action profile: act_prof_dump <act_prof_name>
counter_read         Read value(s) from counter: counter_read <counter name> <index | entry handle>
counter_write        Write value(s) to counter: counter_write <counter name> <index | entry handle> [packets=<N>] [bytes=<N>]
counter_reset        Reset values for counter to 0: counter_reset <counter name> <index | entry handle>
meter_read_spec      Read meter spec: meter_read_spec <meter name> <index | entry handle>
meter_set            Set meter spec: meter_set <meter name> <index | entry handle> <rate_1>:<burst_1> <rate_2>:<burst_2>
direct_res_reset     Remove direct resource configs which are kept ready for next table_add: direct_res_reset

2017.4.5