Cisco BPX 8650, Installation And Configuration Manual

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22-10
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
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 noncompliant or congested
•
Cell errors
• AAL-5 frame counts, errors
The following are the commands used 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 the following OAM cell flows:
•
End-to-End AIS/FERF—Displays the software on a per-connection basis.
• External segment loopbacks—Specifies that the software initiates loopback of ATM-CPE through a
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—Generates 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.
The following are the commands associated with OAM cell status changes:
•
dspalms
• dspcon
•
dspport
• tstconseg
•
tstdly