background image
266 Chapter 8: AppleTalk
IPX Address Format
The 80-bit Novell IPX address is grouped in a typical network.node format. The network
number is a binary number that can be viewed as a hexadecimal number from 1 to FFFFFFFD
and is the first 32 bits. The remaining 48 bits is the host number.
Whenever possible, use descriptive IPX network numbers. The hexadecimal numbers A, B, C,
D, E, and F can be used creatively to define an IPX network. Network numbers should aid in
administration and troubleshooting. If you're designing network numbers by geography, use a
method that displays the most significant information on the left. Another popular method of
using IPX address naming is to convert IP addresses to hexadecimal. For example, 170.50.10.0
would map to AA320A00.
Address fields can be used to distinguish:
·
Media
·
Encapsulation
·
Phone number
·
Office location
·
Department
·
Division
Encapsulation Types
When designing an IPX network, it is important that the Cisco router IPX encapsulation type
match the encapsulation type of the Novell server.
Table 8-2 shows the IPX Ethernet encapsulation types that Cisco supports.
Table 8-3 shows the IPX Token Ring and FDDI encapsulations that are supported by Cisco
routers.
Table 8-2
IPX Encapsulation Types for Ethernet
Novell Term
Cisco Term
Ethernet_802.3 (default for Novell 3.x)
Novell-ether
Ethernet_SNAP
SNAP
Ethernet_802.2 (default for Novell 4.x)
SAP
Ethernet_II
ARPA
87200333.book Page 266 Wednesday, August 22, 2001 2:37 PM