IBM SG24-4817-00 - Manual (Page 160)

This soft copy for use by IBM employees only.
If one of the LECs that is unable to communicate is the IBM 8285
′
s, check to
see if the IP interfaces, CIP, Ethernet LEC and token-ring LEC, have been
defined with different subnetworks. If the IP interfaces are on the same
subnetwork, only the CIP interface is used.
144
ATM Workgroup Solutions: Implementing the 8285 ATM Switch