Novell NETWARE 6-DOCUMENTATION Manual page 1750

When the IAMG is configured, care must be taken to avoid address conflicts.
We recommend using the following configuration guidelines:
Conflicts might occur when token ring and Ethernet interfaces are used
on the same network. For instance, when the NetWare Mobile IPX
software and NetWare remote access software assign node addresses,
they set the IEEE Local bit and clear the IEEE Multicast bit. Because
token ring networks use a different bit order (canonical instead of
noncanonical) within the node address, incorrect interpretations can be
made, and locally assigned addresses might conflict with IEEE token ring
addresses. It is also possible for IEEE Ethernet node addresses to conflict
with IEEE token ring addresses, even though the IEEE assigned
addresses are different. You can avoid conflicts by taking the following
precautions:
Use command line switches to load the LAN drivers on the
conflicting segments with the opposite canonical order for the MAC
addresses.
Use a different LAN card.
Because detected conflicts are echoed to the system console, resolve
conflicts by manually reconfiguring the address of the offending
workstation.
If a router supporting IPX WAN client dial-in connections is configured
to use node addresses that use the upper 34 bits of the node address, node
address conflicts can occur. To avoid conflicts, the IPX WAN client router
must have a registered network address for the WAN clients that is not
translated, or it must use a low node address (less than 14 bits) on that
network.
TM
39
Understanding