OpenDayLight Beryllium版本下发流表实现hardtimeout

fjlinww 2021-08-01 原文

ODL hardtimeout流表

1. 实验拓扑

2. 创建拓扑

from mininet.topo import Topo

class MyTopo(Topo):

    def __init__(self):

        # initilaize topology
        Topo.__init__(self)

        # add hosts and switches
        h1 = self.addHost(\'h1\')
        h2 = self.addHost(\'h2\')
        h3 = self.addHost(\'h3\')

        s1 = self.addSwitch(\'s1\')

        # add links
        self.addLink(h1, s1, 1, 1)
	self.addLink(h2, s1, 1, 2)
	self.addLink(h3, s1, 1, 3)
        
topos = {\'mytopo\': (lambda: MyTopo())}

注意：如果OpenDayLight此前已经创建过拓扑，那么最好在DLUX界面中将相应交换机的流表清空，以免pingall不通

3. ODL DLUX下发流表实现hardtimeout

Yang UI>Opendaylight-inventory>config>nodes>table>flow
node/openflow:1 交换机编号
table/0 流表编号
flow/不超过1024，不冲突即可流表项编号
GET为查询流表，下发流表要修改为PUT
为了使h1 20s 内ping不通h3首先要知道h3和h1分别连接OVS的哪个端口，在mininet中用links查询链路连接情况
h1连接s1的port1
h3连接s1的port3

由于连接上ODL默认ping通，所以下发策略使port1进来的目的IP为h3的数据包都drop掉就能ping不通(也可以反过来使port3进来的目的IP为h1的IP的数据包drop)，同时设置hard_time为20s，则20s后策略失效。

为了保证流表生效，把优先级设成最大，65535

4. 验证流表下发成功

5. 借助Postman调用ODL北向接口下发

http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1

{
    "flow": [
        {
            "id": "1",
            "match": {
                "in-port": "1",
                "ethernet-match": {
                    "ethernet-type": {
                        "type": "0x800"
                    }
                },
                "ipv4-destination": "10.0.0.3/32"
            },
            "instructions": {
                "instruction": [
                    {
                        "order": "0",
                        "apply-actions": {
                            "action": [
                                {
                                    "order": "0",
                                    "drop-action": {}
                                }
                            ]
                        }
                    }
                ]
            },
            "priority": "65535",
            "hard-timeout": "20",
            "table_id": "0"
        }
    ]
}