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So I have a machine booted from PlateSpin's .iso disk (let's call it machine X). I set the IP information for machine X, which takes just fine. Here's where it gets weird...machine X can ping other hosts on the same subnet as well as the Internet, but nothing else. Other hosts on the same subnet can ping machine X as well as Internet, other subnets. No machine outside of machine X's subnet can ping machine X. <br />
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Again, I have other machines I've Platespinned off on the same subnet and they work just fine. Two machines in a row now, however, are giving me this issue. We did just move systems from one data center to another, but previously spun machines are working normally. All on the same subnet. I cannot reach the PortabilitySuite server from machine X because PortabilitySuite machine is on a different vlan. &nbsp;Thoughts anyone?
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So I have a machine booted from PlateSpin's .iso disk (let's call it machine X). I set the IP information for machine X, which takes just fine. Here's where it gets weird...machine X can ping other hosts on the same subnet as well as the Internet, but nothing else. Other hosts on the same subnet can ping machine X as well as Internet, other subnets. No machine outside of machine X's subnet can ping machine X. 

Again, I have other machines I've Platespinned off on the same subnet and they work just fine. Two machines in a row now, however, are giving me this issue. We did just move systems from one data center to another, but previously spun machines are working normally. All on the same subnet. I cannot reach the PortabilitySuite server from machine X because PortabilitySuite machine is on a different vlan.  Thoughts anyone?

weird host/vlan behavior

Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.

Networking Protocols

Transmission Control Protocol/Internet Protocol (TCP/IP) is the set of networking protocols that define end-to-end connectivity specifying how data should be packeted, addressed, transmitted, routed and received at the destination. This functionality is organized into four abstraction layers which are used to sort all related protocols according to the scope of networking involved.