HP 200 Series Services And Applications page 164

AppleTalk Phase 2 Routing Service
Seed Routers
Seed Routers
A router identified as a seed router for a network has been configured with
the network number range and default zone name for all the nodes that
reside on the attached network. (Both the network number range and the
default zone name can be configured using either Quick Configuration or the
Configuration Editor.)
At least one seed router, configured with the network number range and
default zone name, must exist on each AppleTalk network or WAN link.
More than one seed router can be assigned to a network for redundancy.
However, all seed routers for a particular network must be configured with
the same network number range and zone name information.
The seed router dynamically sends the network number to the other
connected routers using RTMP routing protocol messages. If you do not
configure the network number on a router, that router can learn the number
from the seed router.
The seed router can optionally be configured with a list of zone names that
will be valid on the network. Any nodes on the network with a node name
not on this list will be assigned the default zone name by the seed router.
(Note that the zone name list cannot be configured using Quick Configura-
tion; it must be configured using the Configuration Editor.)
Since a router usually connects to more than one AppleTalk network, a
single router may be the seed router for the network on one port but not for
the network on another port. A router can also be configured as the seed
router for different networks on different ports. Note that the network
number range configured on each of the individual ports must be different
and may not overlap.
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