Cisco Systems IGX 8400 manual SCR and PCR Policing at Less than 50 CPS on UXM-E, Bxm, Igx-Uxm-E

Universal Switching Module Enhanced

Alarms for Physical Lines and Logical Trunks

Variations exist in the way switch software supports alarms for physical lines and logical trunks for a trunk-mode UXM-E. The following list summarizes the approach to physical lines and trunks:

•A UXM-E trunk is mapped to a physical line object.

•A physical (non-IMA) trunk is mapped one-to-one with a physical line.

•An IMA trunk is mapped to more than one physical line.

•All line alarms (LOS, LOP, and so on) are reported as physical line alarms.

•Software reports other trunk alarms (such as communication failure, communication break, and so on) as trunk alarms in a manner similar to other, non-UXM-E trunk alarms.

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For non-IMA trunks, the alarm includes the physical line alarm.

For IMA trunks, the trunk and physical line alarms are separate and distinct.

The physical layer trunk alarms include LOS, LOF, AIS, Yel, LOP, Path AIS, and Path Yel. To view these alarms, use the dspphysln command. When you execute dspphysln, any existing alarms appear as the physical line status. For a trunk with one physical line (such as an OC3 trunk or T1/E1 without IMA configured), the integrated alarm status is also shown by the dsptrks command.

You can enable the physical line statistical alarm on the CLI through the cnfphyslnalm command. You can display existing alarms through the dspphyslnerrs command and clear the alarms through the clrphyslnalm command.

To enable or disable the physical line or trunk statistical alarms, use cnftrkalm command. To display any outstanding alarms, use dstrkerrs. To clear the statistical alarms, use clrtrkalm.

To see the physical line and trunk statistical alarm types that apply to the UXM-E, enter the commands for configuring the alarms.

In summary, the applicable commands are dspphyslns, dspphyslnerrs, clrphyslnalm, cnflnalm , dsptrks, dsptrkerrs, cnftrkalm, clrtrkalm, dspalms.

SCR and PCR Policing at Less than 50 CPS on UXM-E

This section provides descriptions of lowered PCR minimum policing values supported by the BXM and UXM-E. When policing is off, connections can be set with PCR values as low as 6 cells per second (CPS). The minimum SCR value can be set to 6 CPS regardless of interfaces. Table 4-11lists the minimum PCR values for different BXM and UXM-E cards when policing is enabled.

Table 4-11	PCR Minimum Values
Card Name	Card Type	Minimum PCR Policing Values
BXM	T3/E3	12 cells per second
BXM	OC-3/OC-12	50 cells per second (or equivalently 19.2 kbps)
IGX-UXM-E	T1/E1	6 cells per second
IGX-UXM-E	T1/E1 IMA	6 cells per second
IGX-UXM-E	OC-3/STM-1	50 cells per second (or equivalently 19.2 kbps)

Note The policing accuracy is always within 1%.

Trunk Cards 4-21