Cisco BPX 8650, Installation And Configuration Manual

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22-9
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
ATF Connection Criteria
ATF connections are allowed between any combination of ATM and Frame Relay UNI and NNI ports.
Virtual circuit connections are allowed. Virtual path connections are not.
ATF connections can be mastered by the IGX switch or BPX switch end.
ATF bundled connections and ATF point-to-point connections are not supported.
ATF connections use the Frame Relay trunk queues: bursty data A for non-ForeSight, bursty data B for
ForeSight.
Bandwidth related parameters are defined using cells per second (cps) on the BPX switch and bits per
second (bps) on the IGX switch. On a given endpoint node, the bandwidth parms for both ends of the
ATF connection are changed/displayed using this end’s units. This saves you from having to convert
from cps to bps repeatedly.
ATF with ForeSight connections use the ABR egress queue.
ATF Connection Management
The following are the commands used to provision and modify ATF connections:
•
addcon
• cnfcls
•
cnfcon
• delcon
•
dspcls
•
dspcon
•
dspcons
Structure
•
NNI—Specifies that the NNI format supports a 12-bit VPI. Abit status changes are passed to the
remote end of the connection.
• ILMI—Specifies that the ILMI MIB and protocol was implemented in release 7.2. The additional
support in consists of an activation and configuration interface, collection of statistics, and
end-to-end status updates
•
LMI Annex G—Specifies that the LMI Annex G protocol was implemented in release 7.2. The
additional support consists of an activation and configuration interface, collection of statistics, and
end-to-end status updates.
•
Port egress queue configuration—Configures each of the predefined port egress queues. The queues
consist of CBR, VBR, and VBR with ForeSight (ABR). The configurable parameters are queue
depth, EFCN threshold, and CLP thresholds.
•
Backward congestion management—Indicates the congestion across the UNI or NNI. Transmission
of these cells is enabled on a per-port basis. Software allows BCM to be configured on a UNI or NNI
port for maximum flexibility should BCM over UNI be standards-defined.