Compatible Systems 5.4 - Manual (Page 80)

74 Chapter 4 - AppleTalk Routing & Bridging
AppleTalk Phase 2 Configuration
AppleTalk Phase 2 is an updated version of the AppleTalk protocol which
allows for more than 256 nodes on an Ethernet segment, and reduces the over-
head required by AppleTalk RTMP (Routing Table Maintenance Protocol).
AppleTalk Phase 2 should be used for all new installations.
> Phase 2 Routing/Bridging/Off
This set of radio buttons controls how AppleTalk Phase 2 packets are handled
for this interface.
• If set to Phase 2 Routing, then AppleTalk Phase 2 packets received on
this interface are routed to the correct interface on the router.
• If set to Phase 2 Bridging, then any AppleTalk Phase 2 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 2
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 2 Off, then any AppleTalk Phase 2 packets received
on this interface are discarded.
Phase 2 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 2 network
range being set by another router on the segment connected to this inter-
face and use this range if it exists. If it doesn’t discover a range in use,
the router will use the configured AppleTalk Phase 2 Net # range
(discussed below) to set the Phase 2 network number(s) for the segment.
It will also assign the configured Phase 2 Zone list to the segment.
• Non-Seed means the router will listen for an AppleTalk Phase 2 network
range being set by another router on the segment connected to this inter-
face and use this range if it exists. If it doesn’t discover a range in use,
the router will wait indefinitely until a range is set by another router on
the segment.