******************* BGP speaker library ******************* Introduction ============ Ryu BGP speaker library helps you to enable your code to speak BGP protocol. The library supports ipv4, ipv4 vpn, and ipv6 vpn address families. Example ======= The following simple code creates a BGP instance with AS number 64512 and Router ID 10.0.0.1. It tries to establish a bgp session with a peer (its IP is 192.168.177.32 and the AS number is 64513). The instance advertizes some prefixes. .. code-block:: python import eventlet # BGPSpeaker needs sockets patched eventlet.monkey_patch() # initialize a log handler # this is not strictly necessary but useful if you get messages like: # No handlers could be found for logger "ryu.lib.hub" import logging import sys log = logging.getLogger() log.addHandler(logging.StreamHandler(sys.stderr)) from ryu.services.protocols.bgp.bgpspeaker import BGPSpeaker def dump_remote_best_path_change(event): print 'the best path changed:', event.remote_as, event.prefix,\ event.nexthop, event.is_withdraw def detect_peer_down(remote_ip, remote_as): print 'Peer down:', remote_ip, remote_as if __name__ == "__main__": speaker = BGPSpeaker(as_number=64512, router_id='10.0.0.1', best_path_change_handler=dump_remote_best_path_change, peer_down_handler=detect_peer_down) speaker.neighbor_add('192.168.177.32', 64513) # uncomment the below line if the speaker needs to talk with a bmp server. # speaker.bmp_server_add('192.168.177.2', 11019) count = 1 while True: eventlet.sleep(30) prefix = '10.20.' + str(count) + '.0/24' print "add a new prefix", prefix speaker.prefix_add(prefix) count += 1 if count == 4: speaker.shutdown() break