Patton electronics 3095, Administrator'S Reference Manual

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15 • TCP mDSL DACS Administrators’ Reference Guide
116 Introduction
Introduction
Transmission Control Protocol (TCP) is in the Transport layer of the OSI model and sits on top of IP. It is one
of the more widely used protocols among the TCP/IP suite. The TCP subsystem web pages of the 3095 DACS
provides management and statistical information on TCP. Detailed information regarding the SNMP MIB
variables may be downloaded from RFC1213: Management Information Base for Network Management of
TCP/IP-based internets: MIB-II.
Click on
TCP
under the
Configuration Menu
to display the
TCP
main window (see figure 36) to monitor TCP
statistics.
Figure 36. TCP main window
TCP main window
Retransmit-Timeout Algorithm (tcpRtoAlgorithm)
The algorithm that determines the timeout value used for retransmitting unacknowledged octets.
Retransmit-Timeout Minimum (tcpRtoMin)
The minimum value permitted by a TCP implementation for the retransmission timeout, measured in milli-
seconds. More refined semantics for objects of this type depend upon the algorithm used to determine the
retransmission timeout. In particular, when the timeout algorithm is rsre(3), an object of this type has the
semantics of the LBOUND quantity described in RFC 793.
Retransmit-Timeout Maximum (tcpRtoMax)
The maximum value permitted by a TCP implementation for the retransmission timeout, measured in milli-
seconds. More refined semantics for objects of this type depend upon the algorithm used to determine the
retransmission timeout. In particular, when the timeout algorithm is rsre(3), an object of this type has the
semantics of the UBOUND quantity described in RFC 793.