56Chapter 2: EIU messaging protocols

Figure 13 Typical configuration for LAN and SuperNode subnets

CM

SuperNode-side subnet

EIU

EIU

LAN-side subnet

For more information on IP addresses, refer to “Appendix H: IP network

number requests” and “Appendix E: Understanding IP and IP addressing”.

How to get IP addresses for SuperNode

To ensure that the network portion of an IP address is unique, all IP addresses are assigned by a central authority, the Network Information Center (NIC). The central authority assigns the network portion of the IP address and delegates responsibility for assigning host addresses to the requesting organization.

It is essential for the NIC to assign IP addresses for networks that are attached to the connected Internet. An individual organization may assign arbitrary IP addresses without contacting NIC, but only if their network is not connected to the public Internet. However, experience has shown that it is unwise to apply this kind of arbitrary addressing scheme. Arbitrary schemes prevent future interoperability and may cause significant problems and down time when converting to NIC-assigned addresses in future. It is strongly recommended that the operating company obtain official Internet addresses from the NIC.

What is the SuperNode network topology?

The network consists of a SuperNode switch and other third-party equipment such as HUBs and workstations. Third party routers may be required for distant LANs or for fault tolerant network architecture. Based on network topology, following information may be required:

297-8991-910 Standard 03.01 August 1999

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Cabletron Systems DMS-100 manual How to get IP addresses for SuperNode, What is the SuperNode network topology?