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Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Chapter6 Card and Service Configuration
Frame Service Module Features
BPX 8600-to-BPX 8600 Segment
For the middle segment, be sure to use the connection type as the local segments on the MGX 8230 node
(CBR, VBR, ABR, or UBR). The parameters directly map from those specified at the connection
endpoint.
Frame Service Module Features
This section describes the features available on each of the Frame Service Modules (FRSMs). The
primary function of the FRSM is to convert between the Frame Relay formatted data and ATM/AAL5
cell-formatted data. For an individual connection, you can configure network interworking (NIW),
service interworking (SIW), ATM-to-Frame Relay UNI (FUNI), or frame forwarding.
Note See the “Frame Relay Service Modules” section on page 2-20 for more information on the features
of the FRSM modules.
An FRSM converts the header format and translates the address for:
• Frame Relay port number and DLCI
• ATM-Frame UNI (FUNI) port number and frame address or frame forwarding port
• ATM virtual connection identifier (VPI/VCI)
This section includes the following topics:
• Summary of Frame Service Module Features, page 6-24
• Configuring the FRSM Cards, Lines, and Ports, page 6-28
• port.vpi.vci identifies the connection.
• discard_option is either 1 for CLP hysteresis or 2 for Frame-based.
• vc_q_depth is the ingress queue depth in the range 1–16000 cells.
• clp_thresh_high is the CLP high threshold in the range 1–16000 cells.
• clp_thresh_low
• or
• epd_threshold
is the CLP low threshold in the range 1–16000 cells for
CLP hysteresis-based discard.
or
is the EPD threshold in the range 1–16000 cells
Frame-based discard.
• efci_thresh is the EFCI threshold in the range 1–16000 cells.