RFC 1419 (rfc1419) - Page 2 of 7
SNMP over AppleTalk
Alternative Format: Original Text Document
RFC 1419 SNMP over AppleTalk March 1993
destination node numbers, and source and destination socket numbers.
Additionally, DDP datagrams include a "protocol type" in the header
field which may be used to further demultiplex packets. The data
portion of a DDP datagram may contain from zero to 586 octets.
AppleTalk's Name Binding Protocol (NBP) is a distributed name-to-
address mapping protocol. NBP names are logically of the form
"object:type@zone", where "zone" is determined, loosely, by the
network on which the named entity resides; "type" is the kind of
entity being named; and "object" is any string which causes
"object:type@zone" to be unique in the AppleTalk internet.
Generally, "object" also helps an end-user determine which instance
of a specific type of service is being accessed. NBP names are not
case sensitive. Each field of the NBP name ("object", "type", and
"zone") is limited to 32 octets. The octets usually consist of
human-readable ascii characters.
2. Specification
SNMP REQUESTS encapsulated according to this standard will be sent to
DDP socket number 8; they will contain a DDP protocol type of 8. The
data octets of the DDP datagram will be a standard SNMP message as
defined in [1].
SNMP RESPONSES encapsulated according to this standard will be sent
to the DDP socket number which originated the corresponding SNMP
request; they will contain a DDP protocol type of 8. The data octets
of the DDP datagram will be a standard SNMP message as defined in
[1]. (Note: as stated in [1], section 4.1, the *source* address of
a RESPONSE PDU will be the same as the *destination* address of the
corresponding REQUEST PDU.)
A network element which is capable of responding to SNMP REQUESTS
over AppleTalk must advertise this capability via the AppleTalk Name
Binding Protocol using an NBP type of "SNMP Agent" (hex 53, 4E, 4D,
50, 20, 41, 67, 65, 6E, 74).
A network management station which is capable of receiving an SNMP
TRAP must advertise this capability via the AppleTalk Name Binding
Protocol using an NBP type of "SNMP Trap Handler" (hex 53, 4E, 4D,
50, 20, 54, 72, 61, 70, 20, 48, 61, 6E, 64, 6C, 65, 72).
SNMP TRAPS encapsulated according to this standard will be sent to
DDP socket number 9; they will contain a DDP protocol type of 8. The
data octets of the DDP datagram will be a standard SNMP message as
defined in [1]. The agent-addr field of the Trap-PDU must be filled
with a NetworkAddress of all zeros (the unknown IP address). Thus, to
identify the trap sender, the name and value of the nbpObject and
Minshall & Ritter