To aid in the management of devices that terminate PPP sessions, several MIBs were defined to allow SNMP management stations to access PPP data. Four RFCs were published, each describing a subset of the PPP MIB. This appendix considers the two major RFCs, which provide the object definitions for the Link Control Protocol MIB and the IP Control Protocol MIB. In addition to the two major RFCs, there are bridging and security MIBs.
Taken together, the PPP MIBs define large groups. Broadly speaking, the major groups presented in this appendix are the Link Group, the LQR Group, LQR Extensions, and the IP Group. The first three are defined by RFC 1471, the LCP MIB. RFC 1473 defines the IPCP MIB.
RFC 1471 creates the PPP MIB in the
transmission group, putting it on par with both
the DS1 and frame relay DTE MIBs. In addition to defining the branch
off of the
transmission group, it also defines
the Link Group, the LQR Group, the Tests Group, and the IP Group.
The Link Group reports information on LCP and the lowest layers of the PPP suite. It is composed of two tables: the link status table and the link configuration table. The Link Group is shown in Figure D-7.
Figure D-7. Link Group of the PPP LCP MIB
The link status table is used to report on the operational parameters of a link and its current status. All entries ...