CCNA Cisco Certified Network Associate Study Guide - FTP Server

406 Chapter 8 � Configuring Novell IPX
To configure multiple frame types on the same LAN network, you can
either use the secondary command or create a subinterface. There is absolutely
no functional difference on how the secondary or subinterface run on
the internetwork. The difference is for administration purposes only.
Configuring Secondary Addresses
Subinterfaces
To configure a secondary address on an Ethernet LAN to support multiple
frame types, use the ipx network command with the secondary parameter
at the end of the command.
Here is an example of adding a secondary network to 2501A’s Ethernet
connection:
2501A#config t
Enter configuration commands, one per line. End with
CNTL/Z.
2501A(config)#int e0
2501A(config-if)#ipx network 10a encap sap sec
If you don’t use the secondary command at the end of the line, the ipx
network command will replace the existing entry. (The shortcut commands
encap and sec were used here instead of the whole command
encapsulation and secondary.)
The important thing to understand is that each frame type must have a
different IPX network number. Notice the 10a in the above example. The
802.3 frame type is using 10 so that you cannot configure the 802.2 frame
type with that number.
To define IPX network numbers to router interfaces that support multiple
networks, you can use a subinterface instead of the secondary command.
This allows one physical interface to support multiple logical IPX networks.
Each subinterface, like a secondary, must have a unique IPX network number
and a unique encapsulation type.