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What type of this PR
Examples of user facing changes:
add eip所使用的arping -s遇到arp回多个包,会造成eip创建失败。
Which issue(s)
在我使用的环境中,出现arp代答(arping 一个包发出会出现2个同样的回包),造成了eip创建失败。
this PR fixes:
使用arping -D 参数代替arping -s
The -D option specifies duplicate address detection mode (DAD). It returns exit status 0, if DAD succeeded i.e. no replies are received.