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18-9
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 18 Configuring Interfaces
Configuring OC-12c SM and MM Interfaces (Catalyst 8540 MSR)
Configuring OC-12c SM and MM Interfaces (Catalyst 8540 MSR)
The 4-port OC-12c SM and MM interface modules provide either single-mode or multimode
intermediate reach. The OC-12c interface module provides an interface to ATM switching fabrics for
transmitting and receiving data bidirectionally at up to 622 Mbps. The OC-12c interface module can
support interfaces that connect to the OC-12c SONET STS12/SDH STM4 physical layer.
These interfaces are used for intercampus or wide-area links.
Note The configuration instructions in this section also apply to the ATM Fabric Integration Module.
OC-12c Interface Configuration (Catalyst 8540 MSR)
The full-width four-port 622-Mbps is available in either a single-mode intermediate reach interface
module or a new multimode module.You can configure your Catalyst 8540 MSR with only the number
and type of interfaces required, up to 32 622-Mbps interface ports using the full-width interface module.
The interface module supports an SC-type connector, and receive and transmit LEDs give quick, visual
indications of port status and operation.
Default OC-12c ATM Interface Configuration without Autoconfiguration
(Catalyst 8540 MSR)
If ILMI has been disabled or if the connecting end node does not support ILMI, the following defaults
are assigned to all OC-12c interfaces:
• ATM interface type = UNI
• UNI version = 3.0
• Maximum VPI bits = 8
• Maximum VCI bits = 14
• ATM interface side = network
• ATM UNI type = private
• Framing = sts-12c
• Clock source = network-derived
• STS stream scrambling = on
• Cell payload scrambling = on
• Reporting alarms = SF SLOS SLOF B1-TCA B2-TCA PLOP B3-TCA
• Path trace message = free format 64-byte string containing path information
• Scrambling = On
• BER thresholds: SF = 10e-3 SD = 10e-6
• TCA thresholds: B1 = 10e-6 B2 = 10e-6 B3 = 10e-6