MPTCP - 實驗記錄

1. 實驗名稱

MPTCP 三路徑實驗
2. 實驗目標

利用 MPTCP 做出在兩個 host 中利用一個 route 實作出具有三條連線的拓樸。
3. 實驗方法

利用 script 建立拓樸
圖1: 實驗拓樸
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#!/usr/bin/python

import argparse
from mininet.net import Mininet
from mininet.node import RemoteController, OVSKernelSwitch, Host
from mininet.cli import CLI
from mininet.link import TCLink, Intf
from mininet.log import setLogLevel, info
from subprocess import call, check_call


def configure_local_mptcp(enable_mptcp):
    """
    Configure MPTCP on the local machine.
    :param enable_mptcp: True to enable MPTCP, False to skip.
    """
    if enable_mptcp:
        try:
            info("Configuring local MPTCP (mptcp_enabled=1)...\n")
            check_call(["sudo", "sysctl", "net.mptcp.mptcp_enabled=1"])
        except Exception as e:
            info(f"Failed to configure local MPTCP: {e}\n")
    else:
        try:
            info("Configuring local MPTCP (mptcp_enabled=0)...\n")
            check_call(["sudo", "sysctl", "net.mptcp.mptcp_enabled=0"])
        except Exception as e:
            info(f"Failed to configure local MPTCP: {e}\n")


def myNetwork(enable_mptcp):
    # Configure MPTCP on the local machine if enabled
    configure_local_mptcp(enable_mptcp)

    # Create Mininet
    net = Mininet(topo=None, build=False, ipBase='10.0.0.0/8')

    info('*** Adding controller\n')

    # Add hosts and router
    h1 = net.addHost('h1')
    h2 = net.addHost('h2')
    r1 = net.addHost('r1')

    # Set bandwidth to 10Mbps
    linkopt = {'bw': 10}

    # Add multiple links between h1, h2, and r1
    net.addLink(r1, h1, cls=TCLink, **linkopt)
    net.addLink(r1, h1, cls=TCLink, **linkopt)
    net.addLink(r1, h1, cls=TCLink, **linkopt)
    net.addLink(r1, h2, cls=TCLink, **linkopt)
    net.addLink(r1, h2, cls=TCLink, **linkopt)
    net.addLink(r1, h2, cls=TCLink, **linkopt)

    net.build()

    # Set all interfaces' IPs to 0 in preparation for manual IP allocation
    r1.cmd("ifconfig r1-eth0 0")
    r1.cmd("ifconfig r1-eth1 0")
    r1.cmd("ifconfig r1-eth2 0")
    r1.cmd("ifconfig r1-eth3 0")
    r1.cmd("ifconfig r1-eth4 0")
    r1.cmd("ifconfig r1-eth5 0")

    h1.cmd("ifconfig h1-eth0 0")
    h1.cmd("ifconfig h1-eth1 0")
    h1.cmd("ifconfig h1-eth2 0")

    h2.cmd("ifconfig h2-eth0 0")
    h2.cmd("ifconfig h2-eth1 0")
    h2.cmd("ifconfig h2-eth2 0")

    # Enable IP forwarding to allow r1 to route packets
    r1.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")

    info('*** Configuring MPTCP for Mininet hosts...\n')
    if enable_mptcp:
        for host in [h1, h2]:
            host.cmd("sysctl -w net.mptcp.mptcp_enabled=1")
            host.cmd("sysctl -w net.mptcp.mptcp_debug=0")
            host.cmd("sysctl -w net.mptcp.mptcp_path_manager=fullmesh")
    else:
        for host in [h1, h2]:
            host.cmd("sysctl -w net.mptcp.mptcp_enabled=0")
            host.cmd("sysctl -w net.mptcp.mptcp_debug=0")

    # Assign IP addresses to r1, h1, and h2
    r1.cmd("ifconfig r1-eth0 10.0.0.1 netmask 255.255.255.0")
    r1.cmd("ifconfig r1-eth1 10.0.1.1 netmask 255.255.255.0")
    r1.cmd("ifconfig r1-eth2 10.0.2.1 netmask 255.255.255.0")
    r1.cmd("ifconfig r1-eth3 10.0.3.1 netmask 255.255.255.0")
    r1.cmd("ifconfig r1-eth4 10.0.4.1 netmask 255.255.255.0")
    r1.cmd("ifconfig r1-eth5 10.0.5.1 netmask 255.255.255.0")

    h1.cmd("ifconfig h1-eth0 10.0.0.2 netmask 255.255.255.0")
    h1.cmd("ifconfig h1-eth1 10.0.1.2 netmask 255.255.255.0")
    h1.cmd("ifconfig h1-eth2 10.0.2.2 netmask 255.255.255.0")

    h2.cmd("ifconfig h2-eth0 10.0.3.2 netmask 255.255.255.0")
    h2.cmd("ifconfig h2-eth1 10.0.4.2 netmask 255.255.255.0")
    h2.cmd("ifconfig h2-eth2 10.0.5.2 netmask 255.255.255.0")

    # Set up multi-path routing for h1
    h1.cmd("ip rule add from 10.0.0.2 table 1")
    h1.cmd("ip rule add from 10.0.1.2 table 2")
    h1.cmd("ip rule add from 10.0.2.2 table 3")
    h1.cmd("ip route add 10.0.0.0/24 dev h1-eth0 scope link table 1")
    h1.cmd("ip route add 10.0.1.0/24 dev h1-eth1 scope link table 2")
    h1.cmd("ip route add 10.0.2.0/24 dev h1-eth2 scope link table 3")
    h1.cmd("ip route add default via 10.0.0.1 dev h1-eth0 table 1")
    h1.cmd("ip route add default via 10.0.1.1 dev h1-eth1 table 2")
    h1.cmd("ip route add default via 10.0.2.1 dev h1-eth2 table 3")
    h1.cmd("ip route add default scope global nexthop via 10.0.0.1 dev h1-eth0")

    # Set up multi-path routing for h2
    h2.cmd("ip rule add from 10.0.3.2 table 1")
    h2.cmd("ip rule add from 10.0.4.2 table 2")
    h2.cmd("ip rule add from 10.0.5.2 table 3")
    h2.cmd("ip route add 10.0.3.0/24 dev h2-eth0 scope link table 1")
    h2.cmd("ip route add 10.0.4.0/24 dev h2-eth1 scope link table 2")
    h2.cmd("ip route add 10.0.5.0/24 dev h2-eth2 scope link table 3")
    h2.cmd("ip route add default via 10.0.3.1 dev h2-eth0 table 1")
    h2.cmd("ip route add default via 10.0.4.1 dev h2-eth1 table 2")
    h2.cmd("ip route add default via 10.0.5.1 dev h2-eth2 table 3")
    h2.cmd("ip route add default scope global nexthop via 10.0.3.1 dev h2-eth0")

    info('*** Post configure nodes\n')
    CLI(net)
    net.stop()


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description="Mininet MPTCP Setup Script")
    parser.add_argument('-m', '--mptcp', action='store', default='0', choices=['0', '1'],
                        help="Enable MPTCP if set to 1. Default is 0 (disabled).")
    args = parser.parse_args()
    setLogLevel('info')
    myNetwork(enable_mptcp=(args.mptcp == '1'))
MPTCP exp1

利用 MPTCP 做出在兩個 host 中利用一個 route 實作出具有三條連線的拓樸。

MPTCP - 實驗記錄

1. 實驗名稱

2. 實驗目標

3. 實驗方法

4. 實驗結果、分析

5. 結論

6. 參考資料
