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18-11
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 18 Configuring Interfaces
Configuring OC-48c SM and MM Interfaces (Catalyst 8540 MSR)
Configuring OC-48c SM and MM Interfaces (Catalyst 8540 MSR)
The Catalyst 8540 MSR supports the following three OC-48c SM and MM intermediate reach fiber
interface modules:
• 1-port OC-48c single-mode intermediate reach plus 4-port OC-12 single-mode fiber
• 1-port OC-48c single-mode intermediate reach plus 4-port OC-12 multimode fiber
• 2-port OC-48c single-mode intermediate reach
• 1-port OC-48c single-mode long reach plus 4-port OC-12 single-mode fiber
• 2-port OC-48c single-mode long reach
Each OC-48c interface module occupies a slot pair. For example, install an OC-48c interface module in
slots 0 and 1, 2 and 3, 9 and 10, or 11 and 12. The chassis supports a maximum of four OC-48c interface
modules. A maximum configuration provides up to four OC-48c ports and 16 OC-12 ports or up to eight
OC-48c ports. The OC-48c interface module supports a dual SC-type connector. Refer to your hardware
installation guide for more information.
The OC-48c interface module is used for intercampus or wide-area links. This interface module is
functionally similar to the current OC-3c and OC-12c interfaces, but operates at a faster speed.
OC-48c supports both UNI and NNI as well as all framing options.
Default OC-48c ATM Interface Configuration Without Autoconfiguration
(Catalyst 8540 MSR)
If ILMI is disabled or if the connecting end node does not support ILMI, the following defaults are
assigned to all OC-48c 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-48c
• Loopback = no loopback
• STS stream scrambling = on
• Cell payload scrambling = on
• Clock source = network-derived
• Reporting alarms enabled = SF SLOS SLOF B1-TCA B2-TCA PLOP B3-TCA
• Path trace message = free format 64-byte string containing path information
• Bit error rate (BER) thresholds: SF = 10e-3, SD = 10e-6
• TCA thresholds: B1 = 10e-6, B2 = 10e-6, B3 = 10e-6