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arping检查网络连通性时，多了一个回包
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#ICW4MH
Bug
peulerosci
Opened this issue
2025-09-03 11:54
<h3>优先级:</h3><p>次要</p><p></p><h3>详细描述:</h3><p></p><p> 【测试类型】：发现问题的测试类型，功能测试、可靠性测试、性能测试等</p><p></p><p>功能测试</p><p></p><p> 【测试步骤】：详细描述可以复现该问题的测试步骤</p><p></p><p>arping -c 3 -I eth1 99.99.67.22</p><p> </p><h3>原因分析:</h3><p></p><p>【定位分析】</p><p></p><p>arping命令多了一个回包</p><p></p><p>回包多的原因是对端的内核参数rp_filter值为2,2表示开启松散的反向路由校验，即只要源地址可达就不会丢弃数据包，若是对端多个网卡上均有IP地址，当接收到arping的数据包时，多个网卡均会回复，因此会多一个或者多个回包。</p><p></p><p>在22.03中rp_filter默认是1，表示严格的反向路由校验，24.03中默认值为2的原因是NetworkManager对于mptcp模块的处理有问题：</p><p></p><p>高版本重写部分mptcp的代码，其中int跟uint类型赋值有误，使NM对于是否支持mptcp判断错误，导致NetworkManager只要重启就会更改rp_filter为2。</p> **二、缺陷分析结构反馈** 影响性分析说明： 缺陷严重等级:(Critical/High/Moderate/Low) 缺陷根因说明: 受影响版本排查(受影响/不受影响): openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP3 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP2 修复是否涉及abi变化(是/否): openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP3 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP2
<h3>优先级:</h3><p>次要</p><p></p><h3>详细描述:</h3><p></p><p> 【测试类型】：发现问题的测试类型，功能测试、可靠性测试、性能测试等</p><p></p><p>功能测试</p><p></p><p> 【测试步骤】：详细描述可以复现该问题的测试步骤</p><p></p><p>arping -c 3 -I eth1 99.99.67.22</p><p> </p><h3>原因分析:</h3><p></p><p>【定位分析】</p><p></p><p>arping命令多了一个回包</p><p></p><p>回包多的原因是对端的内核参数rp_filter值为2,2表示开启松散的反向路由校验，即只要源地址可达就不会丢弃数据包，若是对端多个网卡上均有IP地址，当接收到arping的数据包时，多个网卡均会回复，因此会多一个或者多个回包。</p><p></p><p>在22.03中rp_filter默认是1，表示严格的反向路由校验，24.03中默认值为2的原因是NetworkManager对于mptcp模块的处理有问题：</p><p></p><p>高版本重写部分mptcp的代码，其中int跟uint类型赋值有误，使NM对于是否支持mptcp判断错误，导致NetworkManager只要重启就会更改rp_filter为2。</p> **二、缺陷分析结构反馈** 影响性分析说明： 缺陷严重等级:(Critical/High/Moderate/Low) 缺陷根因说明: 受影响版本排查(受影响/不受影响): openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP3 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP2 修复是否涉及abi变化(是/否): openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP3 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP2
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openEuler-24.03-LTS-Next
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