Sun-microsystems 1.0 Uživatelský manuál stáhnout pdf (Strana 126)

100 SunFDDI/P1.0Adapter User’sGuide—May1997

SMTFrameClassesandTypes

SMT frames are used for peer-to-peer (station-to-station) management. They

are divided into classes, which define the function of the frame. Each class is

then divided into up to three types, which define whether the frame is an

announcement (information only), a request for service, or a response to a

request. Refer to the ANSI/FDDI Station Management (SMT) X3.299 R7.3

Specification for a detailed description of SMT frames and their functions.

The pf_smtmon utility is used to monitor the following SMT frame classes:

NIF(NeighborInformationFrames)

These are the most common frames displayed when you run pf_smtmon.As

the name suggests, they carry information about a neighboring station (for

example, address, description, state, MAC capabilities) and are used as

keep-alive notifications that a station is still attached to the ring and

functioning. An NIF frame can be an announcement, a request, or a response.

SIF(StatusInformationFrames)

These frames carry more detailed information about a station. SIF

configuration frames describe the station configuration (for example, number

of ports, number of MAC entities, connection policy); SIF operation frames

describe the current status of the station. A SIF frame can be either a request

or a response.

ECF(EchoFrames)

These frames are equivalent to ICMP ping packets and are used to test

connectivity between stations. An ECF frame can be either a request or a

response.

RDF(RequestDeniedFrame)

These frames are used to indicate that the request is rejected. If an SMT agent

(such as the SunNet Manager proxy agent delivered with SunFDDI/P) receives

an unsupported or unrecognized request, it issues an RDF frame to indicate

that the request is rejected. An RDF frame is always a response.

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Sun-microsystems 1.0 Uživatelský manuál Strana 126