网卡名称变更

Question

虚拟机没关过，我发现azure的虚机网卡老是自己变动, 现在都到10了，从一开始的ethernet，到ethernet1，再2，3，4……慢慢升，一直到现在的10，估计还会一直升下去……

我用azure虚机配置了一台vpn server自己上网用，用的单网卡自定义配置，开启rras和nat，配置了sstp和l2tp，sstp给电脑用，l2tp给手机用。

每过一段时间，长则十几天，短则1，2天，NAT里面设置的公网接口的网络接口就没有了，要关掉vpn重新配置一次才行

每次变化的时候，IP和Mac地址也都有变化

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在IT的路上，You'll never walk alone

Answer 1

Hi,

您可以尝试下使用azure powershell去设置VM的IP地址为静态地址：看这篇文章：

http://blogs.technet.com/b/matthewms/archive/2014/03/07/setting-static-ip-address-in-windows-azure-virtual-machines.aspx

http://michaelwasham.com/windows-azure-powershell-reference-guide/setting-static-ip-addresses-in-a-virtual-network/

请试下。希望对你有所帮助。

Will

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Answer 2

我试过通过ps来设置静态ip，其实还是动态ip，只不过是在dhcp中创建一个ip保留.以保证每次都拿到相同的ip.但遇到的情况是网卡都丢了，重新生成新的网卡，所以mac都不同了。ip不同了其实我不关心，但是mac都变了，这就会让vpn server认为这是一个新网卡

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在IT的路上，You'll never walk alone

Answer 3

hi,

网卡或者是MAC 地址的改变都是系统行为， 当我们启动或者关机或者更新VM或者服务修复的过程中都会导致虚拟网络适配器和MAC地址的改变（http://msdn.microsoft.com/zh-cn/library/azure/jj156090.aspx#BKMK_Glossary ）。

从官网的FAQ中可以看出：

Will the MAC address remain the same for my virtual machine once it has been created?

No. A virtual machine’s MAC address can change for a few different reasons. If the VM is put in the status Stopped (Deallocated), if you change the virtual machine size, or if there is service healing or planned maintenance of the host server, the MAC address is not retained.

您也可以参考这个类似的case：Static Ethernet MAC Address Virtual Machine   和 Ethernet MAC Address Virtual MAchine Change each time the VM is Started 。

同时我建议你可以对该功能进行投票：http://feedback.azure.com/forums/216843-virtual-machines/suggestions/5217933-static-mac-address

希望对你有所帮助。

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Answer 4

非常感谢专家的回复！

当我们启动或者关机或者更新VM或者服务修复的过程中都会导致虚拟网络适配器和MAC地址的改变。

我这边并没有去关闭过VM也没重启过，所以蛮奇怪的。

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在IT的路上，You'll never walk alone

Answer 5

您可以检查下VM中的系统日志文件，看看里面日志文件中有哪些记录，可以查询到VM发生过什么状况。同时建议可以看下这篇blog的第8点：

http://www.techrepublic.com/blog/10-things/10-things-you-should-know-about-deploying-windows-azure-vms-in-a-hybrid-it-environment/

希望能够帮到你。

Will

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Answer 6

尊敬的技术专家

那么怎样才能固定不变化呢
一旦变化了，系统会认为是更换了网卡，依赖于网卡的所有网络服务都会失效

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在IT的路上，You'll never walk alone

Answer 7

hi,

据我所知，暂时还没有方法让网卡固定不变。在我第2个回复中有个关于投票的链接，您可以在该feature request中进行投票，微软会根据需求在之后的版本中加入或者完善该功能。感谢您的反馈。

Regards,

Will

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