Question

我正在使用Mininet，RYU控制器和OpenFlow 1.3创建一个拓扑，其中主机h1使用交换机h2以下列方式连接到主机p0es0：

h1 h1-eth0:p0es0-eth3
h2 h2-eth0:p0es0-eth4

在我的Ryu Controller应用程序中，我有以下代码片段在我的p0es0开关上安装规则，以便能够从h2到达h1，反之亦然：

    # Install rule to forward packets destined to "10.0.0.2" (h2) via port 3
    ofproto = sw.ofproto        
    match = sw.ofproto_parser.OFPMatch( eth_type = 0x0800, ipv4_dst="10.0.0.1")
    action = sw.ofproto_parser.OFPActionOutput(4)
    inst = [sw.ofproto_parser.OFPInstructionActions(sw.ofproto.OFPIT_APPLY_ACTIONS, [action])]
    mod = sw.ofproto_parser.OFPFlowMod(datapath=sw, match=match,
           instructions=inst, cookie=0, command=ofproto.OFPFC_ADD, idle_timeout=0, 
           hard_timeout=0, priority=100, flags=ofproto.OFPFF_SEND_FLOW_REM)
    sw.send_msg(mod)


    # Install rule to forward packets destined to "10.0.0.1" (h1) via port 4
    match = sw.ofproto_parser.OFPMatch( eth_type = 0x0800, ipv4_dst="10.0.0.1")
    action = sw.ofproto_parser.OFPActionOutput(4)
    inst = [sw.ofproto_parser.OFPInstructionActions(sw.ofproto.OFPIT_APPLY_ACTIONS, [action])]
    mod = sw.ofproto_parser.OFPFlowMod(datapath=sw, match=match,
           instructions=inst, cookie=0, command=ofproto.OFPFC_ADD, idle_timeout=0, 
           hard_timeout=0, priority=100, flags=ofproto.OFPFF_SEND_FLOW_REM)
    sw.send_msg(mod)

我的dump-flow命令按预期确认交换机中规则的正确安装：

*** p0es0 ------------------------------------------- ----------------------

OFPST_FLOW回复（OF1.3）（xid = 0x2）：

cookie = 0x0，duration = 1103.417s，table = 0，n_packets = 0，n_bytes = 0，send_flow_rem priority = 100，ip， nw_dst = 10.0.0.2 actions = output：4

cookie = 0x0，持续时间= 1103.414s，表= 0，n_packets = 0，n_bytes = 0，send_flow_rem优先级= 100，ip， nw_dst = 10.0.0.1动作=输出：3

但是，当我尝试从h2 ping h1或反之亦然时，我收到目标主机无法访问错误。我尝试在p0es0-eth3上使用tcpdump - 我只看到ARP请求数据包。

我在这里遗漏了什么吗？

感谢。

Answer 1

我在没有arp标志的情况下运行Mininet。添加arp选项修复了我的问题。

即，sudo mn - arp --custom fTreeTopo.py --topo ftreetopo --controller = remote，ip = 127.0.0.1

Mininet中的Ping失败，RYU - OpenFlow 1.3

1 个答案: