| |
AppleTalk can be routed over a LAN or WAN by use of Novell Internet Access Server 4.1. You can configure AppleTalk to run over permanent or on-demand WAN connections, and provide application support through the internal network or on a bound LAN interface. The basic AppleTalk configuration parameters modify the default behavior of the protocol and how it is used for LAN or WAN connections.
This topic contains the following sections:
AppleTalk addressing consists of a network number and a node number. Each node dynamically acquires a unique 8-bit node number when it connects to the network. The node tries to use the same address when it connects to the network again. If that address is not available, it tries other numbers until it finds a unique address.
The network portion of the address, as well as the zone assignments, can be of two forms, depending on whether the network is an extended or a nonextended network.
When a nonextended network is used, you assign a single network number and a single zone name to each network. This limits the total number of nodes per network to 254 (nodes 0 and 255 are reserved).
When an extended network is used, you assign a network number range and a zone(s) list to each network. You can assign any contiguous range of network numbers between 1 and 65279 to a network segment. Each network number within the assigned range can support up to 253 nodes, which increases the theoretical limit of the number of nodes per network to greater than 16 million (nodes 0, 254, and 255 are reserved).
An AppleTalk zone is a logical grouping of devices that enables users to locate and access network services, such as printing. A zone name is a logical name associated with some or all of the services on a network or set of networks.
To enable AppleTalk and configure the basic AppleTalk parameters, complete the following steps:
Load NIASCFG, then select the following parameter path:
Select Configure NIAS > Protocols and Routing > Protocols > AppleTalk
Select AppleTalk Status .
Select Enabled .
If you disable the AppleTalk Status parameter, the configuration of the protocol is saved, but AppleTalk is not active.
Select Packet Forwarding .
Select Enabled (Router) .
When the Packet Forwarding parameter is disabled, the system behaves like an end node and does not forward AppleTalk packets from one network to another.
NOTE: Changing Packet Forwarding from Enabled to Disabled , or Disabled to Enabled , will cause all AppleTalk bindings to be deleted. As a precaution, you should write down the binding parameters for all AppleTalk bindings so that you can reconfigure them if necessary.
Select Type of Packet Forwarding .
AppleTalk for NetWare is a Phase 2 router. Select Transition mode if you must support Phase 1 AppleTalk routers. Otherwise, leave the default, Phase 2 , selected.
Once you select Transition , each extended network number must have a range of one and can have only one associated zone name.
If you want to configure other parameters, do so now. When you are finished, complete Step 5 and Step 6 .
If you want to save these changes, press Esc to exit AppleTalk, select Yes to save your changes, then press Esc again to return to the Internetworking Configuration menu.
If you want these changes to take effect immediately, select Reinitialize System from the Internetworking Configuration menu. Select Yes when prompted.
Use this procedure to detect packet errors. We recommend that you leave DDP Checksum disabled under most circumstances.
To enable DDP Checksum , complete the following steps:
Follow the steps in Enabling AppleTalk.
Select DDP checksum .
Select Enabled .
If you want to configure other parameters, do so now. When you are finished, complete Step 3 and Step 4 .
If you want to save these changes, press Esc to exit AppleTalk, select Yes to save your changes, then press Esc again to return to the Internetworking Configuration menu.
If you want these changes to take effect immediately, select Reinitialize System from the Internetworking Configuration menu. Select Yes when prompted.
An internal network is a virtual network contained within the AppleTalk module. It has no physical components and it appears to the router as if it were one of a number of networks to which the router is connected. The internal network supports two nodes, the AppleTalk stack (node 1 on the internal network) and the AppleTalk router (node 2 on the internal network).
Packets must be routed from an external network interface to the internal network. Because the internal network requires an address, it takes up a network number. If you configure AppleTalk without configuring an internal network, to allow application support you must configure one of the bound LAN interfaces.
This procedure enables you to create an internal network; however, AppleTalk can operate without an internal network.
To configure an internal network, complete the following steps:
Follow the steps in Enabling AppleTalk.
Select Internal Network .
Select Enabled .
Select Network Number .
Assign a unique network number between 1 and 65279 to your internal network.
Select Network Zones List .
To add a zone to the list, press Ins and enter the name of desired network zones. You can enter up to 255 zone names. If your router uses transitional routing, it is allowed to use only one zone name. Each zone name can be up to 32 characters.
If you want to configure other parameters, do so now. When you are finished, complete Step 5 and Step 6 .
If you want to save these changes, press Esc to exit AppleTalk, select Yes to save your changes, then press Esc again to return to the Internetworking Configuration menu.
If you want these changes to take effect immediately, select Reinitialize System from the Internetworking Configuration menu. Select Yes when prompted.
This procedure lets you set up static route configurations that AppleTalk recognizes.
To enable static routes for on-demand calls, complete the following steps:
Follow the steps in Enabling AppleTalk.
Select Static Routes for On Demand Calls .
Select Enabled .
If you want to configure other parameters, do so now. When you are finished, complete Step 3 and Step 4 .
If you want to save these changes, press Esc to exit AppleTalk, select Yes to save your changes, then press Esc again to return to the Internetworking Configuration menu.
If you want these changes to take effect immediately, select Reinitialize System from the Internetworking Configuration menu. Select Yes when prompted.
The Expert Configuration options allow you to configure advanced AppleTalk features, such as identifying the Protocol ID (PID) for third-party WAN router vendors. Use this option if your configuration involves a WAN connection connecting AppleTalk for NetWare with another vendor's implementation of AppleTalk, such as the following:
To enable the Expert Configuration options, complete the following steps:
Follow the steps in Enabling AppleTalk.
Select the Expert Configuration Options menu.
Select Vendor Providing AppleTalk over X.25 on the Other Peer when you want to make an X.25 connection with another vendor. Depending on the vendor to whom you will connect, select Cisco , Novell , or Other . When you select Other , you are prompted to enter the vendor's Protocol ID. Use the default (Novell ) unless the vendor does not use the standard Protocol ID.
Select Vendor Providing AppleTalk over X.25 on the Other Peer when you want to make this type of connection. Depending on the vendor to whom you will connect, select 3Com/Cisco , Novell , or Other . When you select Other , you are prompted to enter the vendor's Protocol ID. Use the default (Novell ) unless the vendor does not use the standard Protocol ID.
Select Configure other WAN Media Type PID when you want to make a connection other than X. 25 or frame relay. The Other WAN media PIDs screen is displayed. Press Ins , then select a WAN media type.
NOTE: It is not possible to configure more than one Protocol ID for each WAN media type. That is, the same Novell Internet Access Server 4.1 router cannot connect to routers using different Protocol IDs for X.25 at the same time.
If you want to configure other parameters, do so now. When you are finished, complete Step 3 and Step 4 .
If you want to save these changes, press Esc to exit AppleTalk, select Yes to save your changes, then press Esc again to return to the Internetworking Configuration menu.
If you want these changes to take effect immediately, select Reinitialize System from the Internetworking Configuration menu. Select Yes when prompted.
| |