Testing OF-config support with LINC

This page describes how to setup LINC and test Ryu OF-config with it.

The procedure is as follows. Although all the procedure is written for reader’s convenience, please refer to LINC document for latest informations of LINC.

https://github.com/FlowForwarding/LINC-Switch

The test procedure

• install Erlang environment
• build LINC
• configure LINC switch
• setup for LINC
• run LINC switch
• run Ryu test_of_config app

For getting/installing Ryu itself, please refer to http://osrg.github.io/ryu/

Install Erlang environment

Since LINC is written in Erlang, you need to install Erlang execution environment. Required version is R15B+.

The easiest way is to use binary package from https://www.erlang-solutions.com/downloads/download-erlang-otp

The distribution may also provide Erlang package.

build LINC

install necessary packages for build

install necessary build tools

On Ubuntu:

# apt-get install git-core bridge-utils libpcap0.8 libpcap-dev libcap2-bin uml-utilities

On RedHat/CentOS:

# yum install git sudo bridge-utils libpcap libpcap-devel libcap tunctl

Note that on RedHat/CentOS 5.x you need a newer version of libpcap:

# yum erase libpcap libpcap-devel
# yum install flex byacc
# wget http://www.tcpdump.org/release/libpcap-1.2.1.tar.gz
# tar xzf libpcap-1.2.1.tar.gz
# cd libpcap-1.2.1
# ./configure
# make && make install

get LINC repo and built

Clone LINC repo:

% git clone git://github.com/FlowForwarding/LINC-Switch.git

Then compile everything:

% cd LINC-Switch
% make

Note

At the time of this writing, test_of_config fails due to a bug of LINC. You can try this test with LINC which is built by the following methods.

% cd LINC-Switch
% make
% cd deps/of_config
% git reset --hard f772af4b765984381ad024ca8e5b5b8c54362638
% cd ../..
% make offline

Setup LINC

edit LINC switch configuration file. rel/linc/releases/0.1/sys.config Here is the sample sys.config for test_of_config.py to run.

[{linc,
     [{of_config,enabled},
      {capable_switch_ports,
          [{port,1,[{interface,"linc-port"}]},
           {port,2,[{interface,"linc-port2"}]},
           {port,3,[{interface,"linc-port3"}]},
           {port,4,[{interface,"linc-port4"}]}]},
      {capable_switch_queues,
          [
            {queue,991,[{min_rate,10},{max_rate,120}]},
            {queue,992,[{min_rate,10},{max_rate,130}]},
            {queue,993,[{min_rate,200},{max_rate,300}]},
            {queue,994,[{min_rate,400},{max_rate,900}]}
            ]},
      {logical_switches,
          [{switch,0,
               [{backend,linc_us4},
                {controllers,[{"Switch0-Default-Controller","127.0.0.1",6633,tcp}]},
                {controllers_listener,{"127.0.0.1",9998,tcp}},
                {queues_status,enabled},
                {ports,[{port,1,{queues,[]}},{port,2,{queues,[991,992]}}]}]}
                ,
           {switch,7,
               [{backend,linc_us3},
                {controllers,[{"Switch7-Controller","127.0.0.1",6633,tcp}]},
                {controllers_listener,disabled},
                {queues_status,enabled},
                {ports,[{port,4,{queues,[]}},{port,3,{queues,[993,994]}}]}]}
        ]}]},
 {enetconf,
     [{capabilities,
          [{base,{1,0}},
           {base,{1,1}},
           {startup,{1,0}},
           {'writable-running',{1,0}}]},
      {callback_module,linc_ofconfig},
      {sshd_ip,{127,0,0,1}},
      {sshd_port,1830},
      {sshd_user_passwords,[{"linc","linc"}]}]},
 {lager,
     [{handlers,
          [{lager_console_backend,debug},
           {lager_file_backend,
               [{"log/error.log",error,10485760,"$D0",5},
                {"log/console.log",info,10485760,"$D0",5}]}]}]},
 {sasl,
     [{sasl_error_logger,{file,"log/sasl-error.log"}},
      {errlog_type,error},
      {error_logger_mf_dir,"log/sasl"},
      {error_logger_mf_maxbytes,10485760},
      {error_logger_mf_maxfiles,5}]},
 {sync,[{excluded_modules,[procket]}]}].

setup for LINC

As the above sys.config requires some network interface, create them:

# ip link add linc-port type veth peer name linc-port-peer
# ip link set linc-port up
# ip link add linc-port2 type veth peer name linc-port-peer2
# ip link set linc-port2 up
# ip link add linc-port3 type veth peer name linc-port-peer3
# ip link set linc-port3 up
# ip link add linc-port4 type veth peer name linc-port-peer4
# ip link set linc-port4 up

After stopping LINC, those created interfaces can be deleted:

# ip link delete linc-port
# ip link delete linc-port2
# ip link delete linc-port3
# ip link delete linc-port4

Starting LINC OpenFlow switch

Then run LINC:

# rel/linc/bin/linc console

Run Ryu test_of_config app

Run test_of_config app:

# ryu-manager --verbose ryu.tests.integrated.test_of_config ryu.app.rest

If you don’t install ryu and are working in the git repo directly:

# PYTHONPATH=. ./bin/ryu-manager --verbose ryu.tests.integrated.test_of_config ryu.app.rest