3c03ba0034
When BGP session goes up/down, BGPSpeaker can detect changing the session. Signed-off-by: Toshiki Tsuboi <t.tsubo2000@gmail.com> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
1.9 KiB
1.9 KiB
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.
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