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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.10, Part Number 78-11603-01 Rev. D0, July 2001
Chapter 22 Configuring Frame Relay to ATM Network and Service Interworking
OAM Cells
Channel Statistics
Statistics are supported on a per-channel basis. A range of traffic and error statistics are available.
Channel statistics of these general types are supported:
• Cells received/transmitted, dropped, tagged as non-compliant or congested
• Cell errors
• AAL-5 frame counts, errors
Use these commands to configure and display channel statistics:
• clrchstats
• cnfchstats
• dspchstats
• dspchstatcnf
• dspchstathist
OAM Cell Support
OAM cells are detected and transmitted by firmware. System software displays alarm indications
detected by the firmware. Additionally, loopbacks between the ATM-UNI and the ATM-CPE can be
established. ForeSight round-trip delay cells are generated by firmware upon software request.
System software deals with these OAM cell flows:
• End-to-End AIS/FERF
Software displays on a per-connection basis.
• External segment loopbacks
Software initiates loopback of ATM-CPE via user command. The SAR creates the loopback OAM
cell. External loopback cells received from the ATM-CPE are processed by the SAR.
• Internal ForeSight round trip delay
Measures the RTD excluding trunk queueing delay on each ForeSight connection. Software
displays the result.
• Internal loopback round trip delay
Measures the RTD including trunk queueing delay on each ForeSight connection. Software
displays the result.
• Internal Remote Endpoint Status
These cells are generated by one end of a connection due to remote network connection failure
(Abit = 0). The other end detects these cells and reports the connection status to software, which
displays it.
These commands are associated with OAM cell status changes:
• dspalms
• dspcon
• dspport
• tstconseg
• tstdly