Справочник Пользователя для Netopia R2020

When Macintosh computers encapsulate TCP/IP packets in AppleTalk, either because they are on LocalTalk or 
they are on EtherTalk for administrative reasons, they must use the ser vices of a MacIP gateway. This gateway 
conver ts network traffic into the correct format for AppleTalk or IP, depending on the traffic’s destination. 
Setting up MacIP involves enabling the feature and optionally setting up a range of addresses to be static.

See 

 for more information on how to set up 

MacIP and other IP addressing schemes.

AppleTalk Update-Based Routing Protocol (AURP) allows AppleTalk networks to communicate across an IP 
network. Your local AppleTalk networks (connected to the Netopia R2020) can exchange data with remote 
AppleTalk networks that are also connected to an AURP-capable router.

When two networks using AppleTalk communicate with each other through a network based on the Internet 
Protocol, they are said to be tunneling through the IP network. The Netopia R2020 uses AURP to allow your 
AppleTalk network to tunnel to designated AppleTalk par tner networks, as well as to accept connections from 
remote AppleTalk networks tunneling to your AppleTalk LAN.

To configure AppleTalk networks, you must understand the concept of seeding. Seeding is the process by which 
routers (or more specifically, router por ts) agree on what routing information is valid. AppleTalk routers that 
have been reset, for example, must decide what zones and network numbers are valid before they begin 
routing. In this case, a router may use the information it has stored, or use information it receives from another 
router, depending on how it has been configured.

To help ensure agreement between routers on a network, a seed router is configured with the correct 
information, and other routers obtain their information from that router when they are turned on or reset. 

Routers commonly use one of three types of seeding procedures: hard seeding, soft seeding, and non-seeding. 

Hard seeding: When a router that uses hard seeding is turned on or reset, it requests network number and 
zone name information from any existing routers on the networks it will ser ve. If no other routers reply, the 
router uses the network numbers and zone names specified in its own configuration. If other routers reply, and 
their information matches the router’s own configuration information, the result is the same—the router uses 
the values in its own configuration. However, if other routers provide network numbers or zone names that 
conflict with those in the router’s configuration, the router disables any of its own por ts for which there are 
conflicts. 

Soft seeding: When a router that uses soft seeding is turned on or reset, it requests network number and zone 
name information from any existing routers on the networks it will ser ve. If no other routers reply, the router 
uses the network numbers and zone names specified in its own configuration. If other routers reply, the router 
uses the information they provide, regardless of whether or not there are conflicts between the information 
received and its configured information. Once a soft- or hard seeding router begins to route, it can ser ve as a 
seed router, providing network number and zone name information to other routers upon request. The default 
state of the Netopia R2020’s AppleTalk por ts is soft seeding.

Non-seeding: When a router using non-seeding is turned on or reset, it requests network number and zone 
name information from any existing routers on the networks it will ser ve. For any network where no other 
routers reply, the non-seeding router will not have any active por ts until the next reset.