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[Q] ip address from ethernet address?
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Jeremy Payne
Mar 22, 1994, 10:48:49 PM3/22/94
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This has got to be a FAQ question somewhere, but I couldn't find it in the
usual places, so I'll apologize in advance. How do I determine the ip address
a machine is claiming based on it's ethernet address? A machine on our
subdomain (PC running some sort of Novell something or other) periodically
sends me a couple of giant packets, reporting its ethernet address. As I
understand it the packets are just labelled with the ethernet address, and
the local router/nameserver tracks which of those belong to which ip addresses,
so the packets themselves don't have the ip info in them (??). nslookup
doesn't seem to know about the ethernet addresses associated with each machine
as far as I can tell, although I haven't really delved that deeply. could
someone briefly explain to me how I can pin down the ip address of the offending
machine? If that someone has the time and inclination to educate me a bit
in how the above really works I'd appreciate that too, but eventually I'll
get around to studying this in more detail myself. Thanks in advance,
usual places, so I'll apologize in advance. How do I determine the ip address
a machine is claiming based on it's ethernet address? A machine on our
subdomain (PC running some sort of Novell something or other) periodically
sends me a couple of giant packets, reporting its ethernet address. As I
understand it the packets are just labelled with the ethernet address, and
the local router/nameserver tracks which of those belong to which ip addresses,
so the packets themselves don't have the ip info in them (??). nslookup
doesn't seem to know about the ethernet addresses associated with each machine
as far as I can tell, although I haven't really delved that deeply. could
someone briefly explain to me how I can pin down the ip address of the offending
machine? If that someone has the time and inclination to educate me a bit
in how the above really works I'd appreciate that too, but eventually I'll
get around to studying this in more detail myself. Thanks in advance,
(I'm running SunOS4.1.3 on a sparc 10 BTW)
---------------------------
Jeremy Payne
UIUC Neuroscience program /
College of Medicine
jrp...@uiuc.edu
(217)244-4478
---------------------------
chianti
Mar 23, 1994, 9:19:47 PM3/23/94
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In article <2moe71$c...@vixen.cso.uiuc.edu> jer...@yosemite.npa.uiuc.edu (Jeremy Payne) writes:
>How do I determine the ip address
>a machine is claiming based on it's ethernet address? A machine on our
>subdomain (PC running some sort of Novell something or other) periodically
>sends me a couple of giant packets, reporting its ethernet address. As I
>understand it the packets are just labelled with the ethernet address, and
>the local router/nameserver tracks which of those belong to which ip addresses,
>so the packets themselves don't have the ip info in them (??). nslookup
>
Novell Netware machines might not have IP address unless they run TCP/IP.>How do I determine the ip address
>a machine is claiming based on it's ethernet address? A machine on our
>subdomain (PC running some sort of Novell something or other) periodically
>sends me a couple of giant packets, reporting its ethernet address. As I
>understand it the packets are just labelled with the ethernet address, and
>the local router/nameserver tracks which of those belong to which ip addresses,
>so the packets themselves don't have the ip info in them (??). nslookup
>
They are identified by a 4 bytes network number and a 6 bytes ethernet
address. Those packets must be the Novell Service Advertising packets from
the file server. I don't think you will be able to do much about it. There
is very little public domain info about IPX/SPX protocol.
DC
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