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destination service access point (DSAP)
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Service access point (SAP) that identifies the destination for which
an logical link control protocol data unit (LPDU) is intended.
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DLSw circuit
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Path formed by establishing a data link control (DLC) connection between
each locally configured SNA end system and a local router configured for DLSw.
A DLSw circuit is identified by the circuit ID, which includes the SNA end
system MAC address, local service access point (LSAP), destination MAC address,
and destination service access point (DSAP). Multiple DLSw circuits can operate
over the same DLSw connection.
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DLSw connection
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Set of TCP connections between two DLSw peers that is established after
the initial handshake and successful capabilities exchange.
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I-frame
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Information frame used to transfer sequentially numbered logical link
control protocol data units (LPDUs) between link stations.
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Logical Link Control (LLC)
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Data-link layer protocol used on a LAN. LLC1 provides connectionless
data transfer, and LLC type 2 provides connection-oriented data transfer.
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LLC protocol data unit (LPDU)
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Logical link control (LLC) frame on a DLSw network.
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preemption
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Process by which a master router takes over from a backup router after
recovering from a failure incident.
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priority-cost
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Value that is deducted from the priority value of a router to determine
when it takes over for a master router.
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redundancy group
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Group of DLSw peer routers on the same Ethernet segment of a network
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service access point (SAP)
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OSI term for the component of a network address that identifies the
individual application sending or receiving a packet on a host.
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source service access point (SSAP)
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Service access point (SAP) that identifies the origin of an LPDU on
a DLSw network.
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Switch-to-Switch Protocol (SSP)
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Protocol implemented between two DLSw routers that establishes connections,
locates resources, forwards data, and handles error recovery and flow control.
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