topology
Topology discovery controller in Trema.
Prerequisites
- Ruby 2.0.0 or higher (RVM).
- Open vSwitch (
apt-get install openvswitch-switch). - Graphviz (
apt-get install graphviz)
Install
$ git clone https://github.com/trema/topology.git
$ cd topology
$ bundle install --binstubs
Play
Run the controller topology_controller.rb with trema run by
passing a topology configuration file with -c option, then it
outputs the current topology information in ASCII format.
The triangle topology configuration with three switches:
$ ./bin/trema run ./lib/topology_controller.rb -c triangle.conf
The full mesh with 10 switches:
$ ./bin/trema run ./lib/topology_controller.rb -c fullmesh.conf
In another terminal, you can make changes to the current topology by
adding or deleting switches with trema stop and trema start commands.
$ ./bin/trema stop 0x1
$ ./bin/trema start 0x1
To turn switch ports on/off,
$ ./bin/trema port_down --switch 0x1 --port 1
$ ./bin/trema port_up --switch 0x1 --port 1
To view the current topology graphically,
$ ./bin/trema run ./lib/topology_controller.rb -c fullmesh.conf -- graphviz /tmp/topology.png
To change the LLDP destination MAC,
$ ./bin/trema run ./lib/topology_controller.rb -c fullmesh.conf -- --destination_mac 11:22:33:44:55:66