On Wed, 24 Jun 1998, Michael George wrote:
> What I'm still unclear on is how Netware and IP interact... I know that
> both run as a layer above the media protocol (ethernet in this case),
> but I thought that Netware was the same layer as IP, and that one ran
> one *or* the other.
That's not necessarily true. It often is, but not necessarily. The nice
thing about layered protocols is that they seldom interfere with each
other. It's all packets to the media protocol. Since the Ethernet
protocol, not IP or IPX, determines which computers will receive the
actual data, it's up to the kernel to figure out what to do with it. A
suitably enlightened kernel can inspect the packet headers to determine
whether a packet is IP, IPX, NetBEUI, Appletalk, or something else
altogether, and can run all these protocols simultaneously.
So, in essence, Netware and TCP/IP don't interact.
It's similar to the case with IP protocols. You have the underlying IP
transport mechanism, but you can run TCP, UDP, ICMP, or others on top of
it, and they don't interfere with each other.
> setup in Linux. However, there was no discussion of addressing through
> Netware to the outside world.
Netware doesn't talk to the outside world. IPX has routing "issues" which
make it unsuitable for very large networks.
> That leads me to suspect that rather than Netware being the equivalent
> to TCP/IP, perhaps it is better the equivalent of NFS. This would mean
That's a very good analogy. NFS runs on top of TCP/IP, whereas Netware
runs on top of IPX. And IPX and TCP/IP both run on Ethernet. Both of
those are "layer 4" protocols - the first layer being the wires, second
being the Ethernet framing, timing, and so on, the third being IP or IPX,
and the fourth being the "application protocol" like NFS, Netware, telnet,
ftp, quake, or whatever.
> they can be on the net and dual-boot. When they are running Linux, they
> can send traffic on the same ethernet that has Netware running on it,
> but using TCP/IP and NFS. If my suspicions are right, there should be
> no interference between Netware and the Linux stuff...
That's correct. They could also send traffic using Netware, with the
approprate software such as mars_nwe.
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