![]() ![]() (And this philosophy really dilutes the value of the quad-port Ethernet cards you can get for SBus machines like the SPARCstation, since you can't do that aggregation.)įor modern machines, though, what you said is, in practice, correct. And I doubt that link aggregation was a thing when that machine was current. I'm not aware of any other machines that do this, mind. If, say, port le0 is WAN and port hme0 is LAN, each network sees a unique MAC address - even if it happens to be the same on both networks. The idea with that machine was that you'd never put multiple ports on the same network, so having the same MAC address wouldn't matter - and indeed, for that application, it doesn't matter at all. Sun SPARCstations come to mind - if you put in an auxiliary network card, the new port(s) share the same MAC address as the onboard port. There are machines that reuse MAC addresses. One of the ways I learn a new scripting language is to implement a subroutine to convert a network MAC addr into the IPv6 link-local address, as described in RFC 4862. This is a bit pedantic, but every device doesn't necessarily have to have a unique MAC. But in the long run, TCP/IP won because it was entirely vendor agnostic, was hugely scalable, offered more functionality across the stack, and was still being envolved ( e.g. IPX was popular for a time because network drivers for a few OSes were widely distributed, the protocol was lightweight and required fewer resources, and because single-network LANs were plug-and-play. The act of dividing a network into at least two separate networks. (The seventh bit will be 0, make it a 1). Note: The MAC address 11:22:33:44:55:66 will be used for the following examples. It is commonly known as TCP/IP (Transmission Control Protocol/Internet Protocol). Take the MAC address and convert the first octet from hexadecimal into binary. AppleTalk used XNS-like routing, but had incompatible addresses using shorter numbers. A subnet is a division of an IP network (internet protocol suite), where an IP network is a set of communications protocols used on the Internet and other similar networks. These systems added their own concepts on top of the XNS addressing and routing system VINES added a directory service among other services, while Novell NetWare added a number of user-facing services like printing and file sharing. Among these were Net/One, 3+, Banyan VINES and Novell's IPX/SPX. Take the MAC address and convert the first octet from hexadecimal into binary. ![]() The hidden secret is that not only IPX/SPX, but most other early network protocols were just proprietary, incompatible flavors of XNS:Ī wide variety of proprietary networking systems were directly based on XNS or offered minor variations on the theme. I think XNS addresses were like IPX, with a 32-bit network prefix and a 48-bit MAC address. ![]()
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