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Chapter 3. Using AppleTalk Phase 2
This chapter describes the AppleTalk Phase 2 (AP2) configuration commands and
includes the following sections:
v “Basic Configuration Procedures”
v “AppleTalk 2 Zone Filters” on page 214
v “Sample Configuration Procedures” on page 216
Basic Configuration Procedures
This section outlines the initial steps required to get the AppleTalk Phase 2 protocol
up and running. Information on how to make further configuration changes will be
covered in the command sections of this chapter. For the new configuration
changes to take effect, the router must be restarted.
Enabling Router Parameters
When you configure a router to forward AppleTalk Phase 2 packets, you must
enable certain parameters regardless of the number or type of interfaces in the
router. If you have multiple routers transferring AppleTalk Phase 2 packets, specify
these parameters for each router.
v Globally Enable AppleTalk Phase 2 - To begin, you must globally enable the
AppleTalk Phase 2 software using the AppleTalk Phase 2 configuration enable
ap2 command. If the router displays an error in this step, there is no AppleTalk
Phase 2 software present in your load. If this is the case, contact your customer
service representative.
v Enable Specific Interfaces - You must then enable the specific interfaces over
which AppleTalk Phase 2 is to send the packets. Use the enable interface
interface number
command to do this.
Note: When enabling AppleTalk over ATM, you must enable the specific
emulated LAN interfaces over which AppleTalk is to send packets. You
must not enable AppleTalk over the physical ATM interface. All further
uses of the word “interface” in this chapter refer to the emulated LAN
interface, not the ATM physical interface.
v Enable Checksumming - You can then determine whether the router will compute
DDP checksums of packets it originates. Checksum software does not work
correctly in some AppleTalk Phase 2 implementations, so you may not want to
originate packets with checksums for compatibility with these implementations.
Normally, however, you will want to enable the generation of checksums. Any
packet forwarded with a checksum will have its checksum verified.
Setting Network Parameters
You must also specify certain parameters for each network and interface that sends
and receives AppleTalk Phase 2 packets. After you have specified the parameters,
use the AppleTalk Phase 2 list configuration command to view the results of the
configuration.
v Set the Network Range for Seed Routers - Coordinating network ranges and
zone lists for all routers on a network is simplified by having specific routers
© Copyright IBM Corp. 1994, 1998 213