CISCO-WAN-FR-PORT-MIB

The MIB module to create/configure frame relay ports/interfaces. This module contains tables related to frame relay port states and statistics. The frame relay logical port is referred to as 'frame relay port' in this mib. Terminologies Used: Channel : Generically refers to the user access channel across which frame relay data travels. This is also referred to use logical port/interface in this MIB. Within a given T1 or E1 physical line, a channel can be one of the following, depending on how the line is configured. Unchannelized : The Entire T1/E1 line is considered a channel, where: * The T1 line operates at the speed of 1.536 Mbps and is single channel consisting of 24 T1 time slots. * The E1 line operates at the speed of 1.984 Mbps and is single channel consisting of 31 T1 time slots. Channelized: The channel is any one of the N time slots within a given line, where: * The T1 line consists of any one or more channels. Each channel is any one of 24 time slots. * The E1 line consists of one or more channels. Each channel is any one of 31 time slots. Fractional: The T1/E1 channel is one of the following groupings of consecutively or nonconsecutively assigned time slots: * N T1 time slots(N*56/64Kbps where N=1-23 T1 Time slots per FT1 channel. * N E1 time slots(N*64Kbps where N=1-30 Time slots per E1: channel. SVC : Switched Virtual Circuits. SVCs allow access through a Frame Relay Network by setting up a path to the destination endpoints only when the need arises and tearing down the path when it is no longer needed. Refer ITU Q.933 and Q.922 FECN : Forward Explicit Congestion Notification A bit set by a frame relay network to notify an interface device(DTE) that congestion avoidance procedures should be initiated by the receiving device. BECN : Backward Explicit Congestion Notification A bit set by a frame relay network to notify an interface device(DTE) that congestion avoidance procedures should be initiated by the sending device. DE : Discard Eligibility A user-bit set indicating that a frame may be discarded in preference to other frames if congestion occurs, to maintain the committed quality of service within the network. Frames with the DE bit set are considered Be(Excess Burst Size)excess data. Unchannelized Service Modules: Following Service Modules does not support channelized interfaces(i.e supports only unchannelized). FRSM-VHS : FRSM-2T3/2E3, FRSM-HS2/HS2B, FRSM-T3B/E3B For following service modules, ifTable is supported: FRSM-12.