Appletalk Statistics; Datagram Delivery Protocol - 3Com corebuilder 3500 Implementation Manual

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AppleTalk Statistics

Datagram Delivery
Protocol
T
ALK
You can view statistics for the following AppleTalk protocols:

Datagram Delivery Protocol

Routing Table Maintenance Protocol
Zone Information Protocol
Name Binding Protocol
AppleTalk extends the normal node-to-node delivery of packets to a
process-to-process delivery. The processes running on AppleTalk nodes
exchange data packets through logical sockets assigned by the Datagram
Delivery Protocol (DDP). DDP provides a best-effort, socket-to-socket
delivery of datagrams — packets exchanged using DDP — over the
AppleTalk network.
Datagram delivery is the key service on which other AppleTalk services are
built. All other AppleTalk services, such as RTMP, NBP, and ZIP rely on DDP
for packet delivery, as illustrated in Figure 79 earlier in this chapter.
Your system allows you to view a variety of DDP statistics, including:
inBcastErrors — Number of dropped DDP datagrams for which the
system was not their final destination and they were sent to the
broadcast MAC address
inCsumErrors — Number of DDP datagrams that were dropped
because of a checksum error
inDiscards — Number of DDP Datagrams that were discarded during
routing
inForwards — Total number of packets that were forwarded,
including those with errors
inLocals — Number of DDP datagrams for which an attempt was
made to forward them to their final destination
inNoClients — Number of DDP datagrams that were dropped for
unknown DDP types
inNoRoutes — Number of DDP datagrams that were dropped for
unknown routes
inReceives — Total number of packets that were received, including
those with errors