Specifications

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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
Chapter 2 Module and Service Descriptions
Frame Relay Service Modules
• Frame Relay-to-ATM network interworking (FRF.5) and Frame Relay-to-ATM service interworking
(FRF.8), both transparent and translation modes, configured on a per-permanent virtual circuit
(PVC) basis.
• Standards-based CIR policing and DE tagging/discarding.
• End-to-end ForeSight® rate-based flow control option.
• Capability to extend ForeSight closed-loop congestion management between two Cisco networks
across Frame Relay-UNI or Frame Relay-NNI using ANSI T1.618 consolidated link-layer
management (CLLM) messages.
• Support for high-priority, rt-VBR, nrt-VBR, VBR, and ABR-ForeSight QoS.
• Standard ABR (TM 4.0 compliant).
Note Note: the Foresight option is not available on MGX-FRSM-HS1/B.
ATM FUNI features
• ATM Forum FUNI mode 1A supported.
• Interpreted CCITT-16 CRC at end of the frame (frame discard if in error).
• AAL5 mapping of user payload to ATM.
• Supports 16 VPI values (15 plus the zero VPI); supports virtual path connections (VPCs) for all
nonzero VPI values (up to 15 VPCs).
• Supports 64 VCI value.s
• Supports OAM frame/cell flows.
• Standards-based usage parameter control.
• Support for high-priority, rt-VBR, nrt-VBR, VBR, and ABR-ForeSight QoS.
• Standard ABR (TM 4.0 compliant).
Note Note: the Foresight option is not available on MGX-FRSM-HS1/B.
Frame Forwarding Features
• No assumptions made on the frame header format.
• Interpreted CCITT-16 CRC at end of the frame (with frame dropping on an error).
• If a connection is set up, all frames are routed to/from that connection; otherwise the frame is
discarded.
• No translation/mapping attempted between frame header bits and ATM layer EFCI and DE bits.
• A single set of Frame Relay traffic access parameters (for example, CIR) is configured for the
logical port in frame-forwarding mode; all arriving frames are treated as if they arrived without a set
DE bit; if the frame is determined to exceed the committed rate (exceeding CIR), the CLP of all cells
associated with that frame are set to indicate low priority; if the frame exceeds the total rate allowed
for committed and uncommitted traffic, the frame is discarded.
• Support for high-priority, rt-VBR, nrt-VBR, VBR, and ABR-ForeSight QoS.