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IPX Addressing and Routing 297
Figure 5-32
Novell NetWare Protocols
IPX routing works just like routing, as described in the section "Routing" in Chapter 3. The
logic from the routing algorithm in Chapter 3 is shown here in Figure 5-33 for reference, with
changes made to reflect IPX terminology.
Table 5-30
IPX Addressing Details
Feature
Description
Size of a group
IPX addresses use a 48-bit node part of the address, giving
2
48
possible addresses per network (minus a few reserved
values), which should be big enough.
Unique addresses
IPX calls for the LAN MAC address to be used as the node
part of the IPX address. This allows for easy assignment and
little chance of duplication. Ensuring that no duplicates of
the network numbers are made is the biggest concern
because the network numbers are configured.
Grouping
The grouping concept is identical to IP, with all interfaces
attached to the same medium using the same network
number. There is no equivalent of IP subnetting.
Dynamic address assignment
Client IPX addresses are dynamically assigned as part of the
protocol specifications. Servers and routers are configured
with the network number(s) on their physical interfaces.
Servers can choose to automatically generate an internal
network number at installation time.
Application
Presentation
Session
Transport
Network
Data Link
Physical
Application
OSI
NetWare
TCP/IP
TCP UDP
IP, ARP, ICMP
Network
Interface
SAP, NCP
SPX
IPX
MAC
Protocols
ch05.fm Page 297 Monday, March 20, 2000 5:06 PM