Frame Relay to ATM Network and Service Interworking 12-11
Management, OAM Cells
Management, OAM Cells
OAM cell processing:
• F5 OAM loopback
• AIS
• FERF
• Cisco WAN switching Internal OAM
Functional Description
ATF Summary
Features
• Interworking: ATM to Frame Relay connections
• Connection Statistics
• Round Trip Delay measurements incorporated into the ForeSight algorithm
• Frame Based GCRA (FGCRA). This is an enhancement of the Generic Cell Rate Algorithm
• IBS (Initial Burst Size)
• cnfportq: 3 egress port queues are configurable CBR, VBR and VBR w/Foresight. (Queue Bin
numbers and algorithm types are NOT user selectable.)
• BCM (Backward Congestion Messages)
• ILMI and associated configuration options and statistics
• Loopback functions: tstdly, tstconseg, addrmtlp, addloclp
• Selftest/ Background tests
• OAM flows: AIS, FERF, OAM loopback
• ASI/2 E3 support
• End-to-end status updates (per FR/ATM interworking)
• Annex G and associated configuration options and statistics
• ASI-1 as a clock source is supported.
Limitations
• Priority Bumping is not supported across the interface shelves, but is supported across the routing
network.
• Statistical Line Alarms per Software Functional Specification (i.e., Bellcore standards).
• Programmable Opti Class: although 4 connection classes are supported: CBR, VBR, VBR with
Foresight, ATF, and ATF with ForeSight. Configuration of egress port queues and BNI trunk
queues for these connection classes is available.
• Port loopback tstport
