Rules for Setting Up a Transition Mode Configuration

When you configure Novell Internet Access Server 4.1 routing software in transition mode for extended networks, the following conditions must be in effect:

• Phase 1 routers typically predate the introduction of AppleTalk Phase 2 and have not been upgraded to support Phase 2. You can connect Phase 1 routers only to nonextended networks (EtherTalk 1.0, ARCnet, and LocalTalk) because Phase 1 does not support extended networks (EtherTalk 2.0, TokenTalk, and FDDITalk). However, having nonextended networks on an internetwork does not necessarily mean that a Phase 1 router is present.
• If the internetwork has Phase 1 routers and you want to keep them installed and configured as Phase 1 routers (rather than upgrade them to Phase 2), you configure all Phase 2 routers on the internetwork in transition mode. When you do that, the Phase 2 router modifies its behavior to operate with a Phase 1 router.
• The Type of Packet Forwarding option must be set to Transition (Phase 1 and 2) from the AppleTalk Configuration screen.
• On extended networks, the first number in the network range must be equal to the last number in the range, as in 10 to 10.
• On extended networks, the zones list must have only one zone.

Nonextended networks should be configured as usual.

As usual, the network number or range you assign to an interface must be unique on the internetwork and consistent for all routers on that network segment. The zone name you assign to an interface must also be consistent for all routers on that network segment.