BGP 扬声器库

介绍

OS-Ken BGP 扬声器库帮助你的代码启用 BGP 协议。该库支持 IPv4、IPv4 MPLS 标签 VPN、IPv6 MPLS 标签 VPN 和 L2VPN EVPN 地址族。

示例

以下简单的代码创建一个带有 AS 号 64512 和路由器 ID 10.0.0.1 的 BGP 实例。它尝试与一个对等体建立 bgp 会话（其 IP 地址为 192.168.177.32，AS 号为 64513）。该实例通告一些前缀。

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 "os_ken.lib.hub"
import logging
import sys
log = logging.getLogger()
log.addHandler(logging.StreamHandler(sys.stderr))

from os_ken.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