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I have 6 other hosts with no issues, and no firewalls are between the two devices. &nbsp;<br />
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Is there something different with a fresh build of 5.1 than an upgrade from 4.1 to 5.1?
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I have 6 other hosts with no issues, and no firewalls are between the two devices.  

Is there something different with a fresh build of 5.1 than an upgrade from 4.1 to 5.1?

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Are you using vLANs on your network?
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I was able to get them both to work. &nbsp;The windows PC patched and turned on the firewall. &nbsp;The vma, I redeployed and let it take a DHCP address and it is now working.
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I was able to get them both to work.  The windows PC patched and turned on the firewall.  The vma, I redeployed and let it take a DHCP address and it is now working.

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I have a vma and a windows PC as guests on a esxi 5.1 host. &nbsp;From both guests I can ping everything on the network and the guests and ping each other. &nbsp;I can not ping the guests from my subnet, but the guests can ping my workstation. &nbsp;I can ping the guest from a workstation on the same subnet. &nbsp;I believe with a fresh install of 5.1 you can not ping from other subnets, but I can not access the vma on port 5480 to manage it either. &nbsp;HELP!
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I have a vma and a windows PC as guests on a esxi 5.1 host.  From both guests I can ping everything on the network and the guests and ping each other.  I can not ping the guests from my subnet, but the guests can ping my workstation.  I can ping the guest from a workstation on the same subnet.  I believe with a fresh install of 5.1 you can not ping from other subnets, but I can not access the vma on port 5480 to manage it either.  HELP!

can not ping vm guests on esxi 5.1

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.