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cct: Circuits Information Base
The circuits “cct” information base contains variables that describe
transmission and reception activities across each LAN and
point-to-point circuit. The structure is the following:
cct
cct stands for the circuit name, usually
indicating circuit type (see subheadings)
variables for each type of circuit, as listed below
The pathname is constructed as follows:
cct.cct.variable
The variables are listed alphabetically under each type of circuit:
WAN Circuits
This subsection describes variables common to all WAN circuit types.
For variables specific to certain WAN circuit types, refer also to the
following:
PPP--the industry-standard Point-to-Point Protocol-- page 18-35
Frame Relay--page 18-22.
bad_frames_rx contains the aggregate number of erroneous frames
received by circuit cct.
cable_type contains a code indicating the type of cable detected on
the port for circuit cct, as follows:
0 loopback hood 4 RS-232/V.24/V.28 cable
1 V.35 cable 5 n/a
2 RS-422/449/V.36 cable 6 n/a
3 X.21 cable 7 no cable
dls_ret_rx contains the number of frames, received by circuit cct,
that were later returned by the data-link service (DLS) software. Within
the router software architecture, DLS resides between the driver soft-
ware and the application software. It performs such services as
Management Information Base Variables
cct: Circuits Information Base
18-14