经过测试将这个没有获取到ip的机器直接配置成router分配的ip,可以正常通信
-----邮件原件----- 发件人: Darren Tang [mailto:darrentang...@gmail.com] 发送时间: 2014年9月24日 14:11 收件人: users-cn@cloudstack.apache.org 主题: Re: 答复: 答复: 高级网络中vm获取不到ip地址问题 如果你手动在虚拟机里面配置分配的IP地址,通信正常么 在 2014年9月24日 下午1:57,张仕博 <zhang...@neusoft.com>写道: > 不好意思,如下是我搭建环境的主要信息 > > 环境是vmware的 > 两台主机,网络配置相同,第一块网卡做管理网,第四块网卡建的分布式交换机,来宾虚拟机都在分布式交换机上,并且第四块网卡连接的交换机trunk口 > 。 > > 来宾网络有多个,对应不同的vlan,使用cloudstack的自定义网络(dhcp和dns服务)在分布式交换机上建出对应多个vlan的端口组 > 。 > > > 问题现象是同一个vlan内的来宾虚拟机如果碰巧和router在一个主机上,dhcp广播即可到达,如果来宾虚拟机在另外一台主机dhcp广播则不 > 能到达router,进而获取不到ip地址。 > > > Dhcp广播通过抓包工具已经证实确实没有广播到另外的那台主机上,是不是可以肯定问题原因一定处在交换机上呢? > > > > > -----邮件原件----- > 发件人: Darren Tang [mailto:darrentang...@gmail.com] > 发送时间: 2014年9月24日 13:33 > 收件人: users-cn@cloudstack.apache.org > 主题: Re: 答复: 高级网络中vm获取不到ip地址问题 > > 麻烦你提供详细点的信息。 > > 两台主机几块网卡,都是怎么配置的,区域中管理,存储,来宾,公共流量是怎么定义的。交换机是怎么配置的。网段,vlan都是怎么配置的。。等等 > 你得先把环境描述清楚,才方便大家帮你解决问题。 > > dhcp获取ip地址共分为4个步骤,其中前3个步骤(请求,回应,确定) 是广播的。 > 一般而言,vlan可以隔离广播域和冲突域,如果只是在一台主机中有效,那问题还应该在网络层面。 > > 在 2014年9月24日 下午1:22,张仕博 <zhang...@neusoft.com>写道: > > > 有没有网络方面的高手给仔细分析下 > > > > 该问题已经确认到dhcp广播报文没能跨主机广播,仅仅在一台主机内收到广播,而交换机上又没有配置什么针对dhcp的配置,有没有网络方面的高 > > 手帮 > > 忙分析分析,交换机是H3C > > 5510三层交换机设备 > > > > > > > > -----邮件原件----- > > 发件人: 张仕博 [mailto:zhang...@neusoft.com] > > 发送时间: 2014年9月23日 17:47 > > 收件人: 'users-cn@cloudstack.apache.org' > > 主题: 答复: 高级网络中vm获取不到ip地址问题 > > > > 我通过如下方式测试了一下网络连通性 > > 在主机A(没有router的那台)新建一台虚拟机,给这个虚拟机配置静态IP,用的就是就是同一个来宾ip段内的ip > > 通过这个机器ping主机B(有router的那台)上同段的机器可以ping通 > > > > > > -----邮件原件----- > > 发件人: Darren Tang [mailto:darrentang...@gmail.com] > > 发送时间: 2014年9月23日 17:35 > > 收件人: users-cn@cloudstack.apache.org > > 主题: Re: 高级网络中vm获取不到ip地址问题 > > > > 没得说,来宾网络有问题,重点检查物理网络,vlan,trunk等等配置。 > > 虚拟机和vr在一台机器上能获取ip,不再同一台机器上就不能获取。 现象已经很明显了。 > > 各主机之间的同一个来宾网络不通。 > > > > 2014-09-23 13:39 GMT+08:00 张仕博 <zhang...@neusoft.com>: > > > > > Vmware环境中两台主机A和B,router在主机B上,新建虚拟机如果在主机B上,则可以 > > > dhcp获取ip地址,但是如果新建虚拟机分到了主机A上,则分不到ip地址,使用的网络 > > > 是分布式交换机网络,虚拟机A和B都与router在同一个网络内。 > > > 经测试,网络连通性应该没有问题,已通过其他虚拟机测试过与router、与主机的连通 > > > 性, > > > > > > 哪位高手给支个招如何排查? > > > > > > ------------------------------------------------------------------ > > > -- > > > -- > > > ----------------------------- Confidentiality Notice: The > > > information contained in this e-mail and any accompanying > > > attachment(s) is intended only for the use of the intended > > > recipient and may be confidential and/or privileged of Neusoft > > > Corporation, its subsidiaries and/or its affiliates. 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