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- Organization: Rohm and Haas Company
- Date: Mon, 14 Dec 1992 18:18:31 EST
- From: Aengus Lawlor <RBYAML@rohvm1.rohmhaas.com>
- Message-ID: <92349.181831RBYAML@rohvm1.rohmhaas.com>
- Newsgroups: comp.sys.novell
- Subject: Re: LANSUP.COM mistakenly reverses MAC address bit order.
- References: <1992Dec13.164000.13941@bernina.ethz.ch>
- Lines: 47
-
- In article <1992Dec13.164000.13941@bernina.ethz.ch>, pkarrer@bernina.ethz.ch
- (Peter Karrer) says:
- >
- >This is from my CONFIG.SYS:
- >
- > DEVICE=C:\LSP\PROTMAN.DOS /I:C:\LSP
- > DEVICE=C:\LSP\NETFLX.DOS
- > DEVICE=C:\LSP\DXMA0MOD.SYS
- > DEVICE=C:\LSP\DXME0MOD.SYS 400000037292
- What happens if you try DEVICE=...DXME0MOD 200000C04E49?
- And shouldn't that be DXMC0MOD?
- >
- >NETFLX.DOS is a *Token-Ring (802.5)* NDIS driver.
- >DXMA0MOD/DXME0MOD is an IBM NDIS-to-LAN Support Program (ASI[?]) shim.
- >400000037292 is my PC's "locally administered" LAN address.
- >
- >My AUTOEXEC.BAT has NETBIND, LSL, LANSUP, ROUTE, IPX, NETX, TCPIP, TELAPI etc.
- >We need the LAN Support interface for a 3270 emulator (Attachmate Extra!
- >for Windows).
- >
- >Now, LANSUP.COM tells me:
- > Initializing ETHERAND adapter...
- > Node Address 20000C04E49
- > ...
- >020000C04E49 is 400000037292 with reversed bit order within address bytes.
- >(Setting the node address in NET.CFG has no effect.)
- >
- >Sure enough, when I trace IP traffic, I see that the MAC header source
- >address is correct, while the ARP reply address has its bits swapped...
- >
- >The problem probably comes from the fact that support for 802.5 NDIS drivers
- >is a new feature of LAN Support Program version 1.3x; earlier versions
- >only supported 802.3 and DIX 2.0, for which bit swapping is OK.
- >
- >I think LANSUP.COM needs an upgrade, or is there some workaround?
- >
- >Meanwhile, I could patch LANSUP.COM (I've identified the flag which is
- >responsible for bit swapping), but perhaps I shouldn't...
- >
- >--
- >Peter Karrer pkarrer@bernina.ethz.ch
- Aengus
- --
- RBYAML@ROHMHAAS.COM Aengus Lawlor
- RBYAML@ROHVM1.BITNET (who used to be ALAWLOR@DIT.IE)
- "How about some of that famous Dublin wit, Barman?"
- "Certainly, sir. Would that be Dry or Sparkling?"
-