
Chapter 9: Token Ring Problems
9-10 Troubleshooting Guide
9.8 Token Ring Users Cannot Communicate with Their Ethernet Servers in a Novell
Environment (IPX)
This can happen using an ETWMIM in an MMAC while operating in a Novell environment (IPX).
NOTE: The issue here is that Token Ring communicates in Most Significant Bit (MSB) mode, while
Ethernet communicates using the Least Significant Bit (LSB) mode. Novell recommends that the users
change their Token Ring drivers to LSB mode. However, when you do change your Token Ring drivers to
LSB mode, everyone that needs to communicate on the Token Ring side must be in LSB mode.
Cabletron Systems provides a parameter in the ETWMIM and 9T122 boards called an IPX translation
switch. This IPX translation switch canonically bit swaps the appropriate data and corrects the IPX issue.
But, because Novell uses an internal MAC address for their SPX connections, you need to keep all SPX
connections to the local segment for Ethernet, or local ring for Token Ring.
Can the Token Ring client communicate with Ethernet servers?
YN
Set the IPX translation in the Token Ring client.
Is the IPX translation set?
YN
Do you have in-band management?
YN
Do you have out-of-band management?
YN
Are your Token Ring clients using ODI drivers?
YN
Call Cabletron Technical Support.
Go to net.cfg file for the Token Ring DNI card. In the Link Driver section of this file, add LSB to the Token
Ring Frame Type.
Example: FRAME=TOKEN-RING LSB
Save the file and reboot the PC.
Can the Token Ring client communicate with the Ethernet servers?
YN
Call Cabletron Technical Support.
Congratulations, the problem is solved.
For the 9T122 board, go to the Bridge Configuration screen in SPEL or SPECTRUM and select
“IPX translation”. For the ETWMIM, refer to the release notes for the OID string. If there are any questions
about how to use the OID strings, call Cabletron Technical Support.
Can the Token Ring client communicate with the Ethernet servers?
YN
Call Cabletron Technical Support.
Congratulations, the problem is solved.
If you have SPEL or SPECTRUM and ETWMIM modules, go to the Bridge Configuration screen and select “MSB”,
or if you have 9T122 boards, select “IPX translation”.
Can the Token Ring client communicate with the Ethernet servers?
YN
Call Cabletron Technical Support.
Congratulations, the problem is solved.
Call Cabletron Technical Support.
Congratulations, the problem is solved.
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