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72 Chapter 4 - AppleTalk Routing & Bridging
v Note: Although Compatible Systems routers support AppleTalk Phase 1,
we recommend that all new AppleTalk installations use AppleTalk Phase 2,
which is much more capable.
v Note: In transitional routing installations, the same range of potential
AppleTalk network numbers is shared by both Phase 1 and Phase 2. Care
must be taken to avoid network number conflicts in these installations.
> Phase 1 Routing/Bridging/Off
This set of radio buttons controls how AppleTalk Phase 1 packets are handled
for this interface.
• If set to Phase 1 Routing, then AppleTalk Phase 1 packets received on
this interface are routed to the correct interface on the router.
• If set to Phase 1 Bridging, then any AppleTalk Phase 1 packets received
on this interface are forwarded to the router’s internal bridge. This setting
makes this Ethernet interface a member of the “AppleTalk Phase 1
Bridge Group” for this router.
v Note: The Phase 1 Bridging radio button will be grayed out unless
bridging has been turned on globally for the device using the Main Bridging
Configuration Dialog Box (under Global/Bridging) and locally on this inter-
face using the Bridging: Ethernet Dialog Box (under Ethernet/Bridging).
• If it is set to Phase 1 Off, then any AppleTalk Phase 1 packets received
on this interface are discarded.
Phase 1 Seed Status
One of the functions which routers perform in AppleTalk internetworking is
setting the AppleTalk network number for each network segment. A router
which sets the network number for a segment is said to have “seeded” the
network.
• Seed means the router will listen for an AppleTalk Phase 1 network
number being set by another router on the segment connected to this
interface and use this number if it exists. If it doesn’t discover a number
in use, the router will use the configured AppleTalk Phase 1 Net #
(discussed below) to set the Phase 1 network number for the segment. It
will also assign the configured Phase 1 Zone name to the segment.
• Non-Seed means the router will listen for an AppleTalk Phase 1 network
number being set by another router on the segment connected to this
interface and use this number if it exists. If it doesn’t discover a number
in use, the router will wait indefinitely until a number is set by another
router on the segment.