Avaya 580 User Manual page 546

Chapter 19
19-2
The Avaya P580 and P882 Multiservice switches support the following
AppleTalk protocols:
AppleTalk Address Resolution Protocol (AARP)
This is an AppleTalk support protocol that maps the hardware
address of an AppleTalk node to an Appletalk protocol address.
Routing Table Maintenance Protocol (RTMP)
This protocol maintains information about AppleTalk addresses and
connections between different networks. Specially, it tells each
router to:
Learn a new route to other routers
—
Delete a route if the local router has not broadcast that route to
—
the network for a certain period of time.
Name-Binding Protocol (NBP)
This protocol translates alphanumeric entity names to AppleTalk
addresses. NBP maintains a table of node addresses and entities
within each node. Because each node also maintains it own list of
named entities, the name directory within an AppleTalk network is
not centralized. The names directory database is distributed among
all nodes on the intranetwork.
Datagram Delivery Protocol (DDP)
This protocol transfers data in packets called datagrams.
AppleTalk Echo Protocol (AEP)
This protocol is used to send datagrams to other nodes in the
network. The transmitted AEP datagram causes the destination node
to return, or echo, that datagram to the sending node. This protocol
determines whether a node is accessible before any sessions are
started, and it enables users to estimate the round-trip delay time
between nodes.
Zone Information Protocol (ZIP)
AppleTalk routers use this protocol to map network numbers to
zones. Each AppleTalk router maintains a Zone information Table
which lists the zone-to-network mapping information.
For more detailed information about these protocols, see the AppleTalk
documentation.
User Guide for the Avaya P580 and P882 Multiservice Switches, v6.1