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- From: lupe@ukw.uucp (Lupe Christoph)
- Newsgroups: comp.sys.sun.admin
- Subject: Re: Sun Ethernet cards
- Keywords: Ethernet address
- Message-ID: <1992Nov22.100440.4340@ukw.uucp>
- Date: 22 Nov 92 10:04:40 GMT
- References: <1992Nov20.132857.646@alijku05.edvz.uni-linz.ac.at> <1992Nov20.154819@sld60pki-nbg.philips.de>
- Sender: uucp@stasys.sta.sub.org
- Organization: cic
- Lines: 44
-
- pla_kbh@sld60pki-nbg.philips.de (Kurt Behnke (TEAM SOS)) writes:
-
- >On two of our Sun (Sparc 2) WS we have installed an additional Ethernet
- >controller (le1; the onboard controller is le0). The purpose is to try
- >some OSI protocols on a small network, and not to interfere with the usual
- >IP traffic on the standard LAN.
-
- >When booting, the Sun OS takes the Ethernet address from le0, and assigns it
- >to le1, so that both have the same address. This even applies if le0 is
- >not connected. Since we want to use the second
- >net for some different kind of traffic the following questions arise:
-
- In fact, the Ethernet cards do not have an address; the Ethernet address
- is in the non-writable portion of the NVRAM.
-
- >i) Is this assignment valid for ARP/IP only, or can I also use it for protocols
- >like LLC1/2?
-
- Ethernet is Ethernet, no matter what the packets contain.
-
- >ii) Is there any way to read the original Ethernet address, encoded in le1,
- >by a program, using ioctl()s etc., or can it be retrieved by some
- >administrative tool?
-
- The easiest way is to do "ifconfig -a". I believe I have seen a hack to
- read the address from the kernel, but I didn't keep it. Of course this
- is the ethernet address from the NVRAM, as there is none other.
-
- >iii) If i) and ii) have a negative answer, what can I do if I don't know
- >the 'native' address of le1?
-
- Despair, because it hasn't got one? ;-)
-
- >Sorry for my ignorance. Any f l a m in g replies send directly to
- >my e-mail address please.
-
- There are probably many people who still don't know this little
- peculiarity, even though Sun has been doing this since their
- beginning.
- --
- | ...!unido!ukw!lupe (German EUNet, "bang") | Disclaimer: |
- | lupe@ukw.UUCP (German EUNet, domain) | This is an unofficial |
- | suninfo!alanya!lupe (Sun Germany) | opinion of Christoph & |
- | Res non sunt complicanda praeter necessitatem. | Imschweiler Consulting |
-