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circuit cost
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Value you assign to a remote peer to indicate the relative preference
for establishing a circuit through the specified peer. The lower the cost,
the higher the preference.
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circuit weight
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Value you assign to a remote peer to indicate the extent to which
the specified peer can participate in establishing circuits. The higher the
circuit weight, the greater the percentage of total circuits established with
this remote peer.
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destination service access point (DSAP)
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Service access point (SAP) that identifies the destination for which
a 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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explorer timeout
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Number of seconds a DLSw router waits for a response from its peers
to its explorer requests.
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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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local reachability cache
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Cache of pairs of local media access control (MAC) addresses and local
Logical Link Control (LLC) IP addresses, maintained on a DLSw router for a
specified number of seconds. The router uses the local cache to determine
whether a local SNA host is reachable through any of the router's LLC interface.
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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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remote reachability cache
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Cache of pairs of remote media access control (MAC) addresses and remote
peer IP addresses, maintained on a DLSw router for a specified number of seconds.
The router uses the remote cache to determine whether a remote SNA host is
reachable through any of the router's remote peers.
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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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