MultiPort/LT User Reference
Page 17
Introduction to Network Addressing
1.6.5.
Seed Gateways
A seed gateway is one which is configured with, and permanently knows, its
own AppleTalk network number and is able to inform other (non-seed)
gateways on its network of that known network number.
Network numbers are unique for each interface on a device. Therefore, it is
possible for a gateway to be a seed gateway for some of the networks it
connects with and not others.
A non-seed gateway is one which is not configured with the network number.
Instead, the non-seed gateway will obtain the network number from a seed
gateway on that network.
A seed gateway can also inform other gateways of zone names. If a gateway is
a seed gateway for a network number then it must also be made the seed
gateway for that network's zone name.