What's New for Cisco IOS XE 17.15.x

This chapter describes the new hardware and software features that are supported on the Cisco NCS 4201 and Cisco NCS 4202 Series routers.

For information on features supported for each release, see Feature Compatibility Matrix.

What's New in Hardware for Cisco IOS XE 17.15.1

Optics Description

Management Port LED Status Indicators

The right LED indicator for the management port on the router now displays the link status and activity of the management port. You can monitor and troubleshoot the status and activity of the management port more effectively when the LED indicator turns green or in the Off state.

For more details on the link status and activity, see the CPU Management Port LED Indication table.

What's New in Software for Cisco IOS XE 17.15.1

Feature Description

Alarm Configuring and Monitoring

SONET Alarms for APS

  • With Automatic Protection Switching (APS), SONET alarms soaking as per the recommendation from GR-253.

  • Alarm is raised or cleared during APS manual, force, and lock out switch actions.

  • When traffic is switched to an alternate link in the APS group, the severity of the alarms is affected based on service impact.

SD-BER and SF -BER Alarms for T1/E1 and T3/E3 services

Signal Failure-Bit Error Rate (SF-BER) and Signal Degrade-BER (SD-BER) alarms are declared when there is a signal failure or signal degradation that happens in the traffic.

These alarms may be raised when the error rate of a given entity exceeds the user-configured BER threshold value.

This helps the administrator to take corrective actions.

CEM OCx

DDS DS0 Remote Latching Loopback

DS0 loopback is used for testing and troubleshooting the T1 or E1, T3 or E3, and OCx channel over PSN. You can configure DS0 loopback on these controllers for remote devices.

Protection Switching Count for Protected SONET Interface

In SONET with redundancy, an Automatic protection switching (APS) occurs between working and standby protection networks due to reasons like a circuit failure. Whenever the switching happens, the switching count is tracked using a Protection Switching Count (PSC) parameter.

Depending on the PSC count, you can debug the network to identify the reason for extensive switching and work on the corrective actions.

TCAM and NFT Commands

TCAM and NFT Commands

New commands have been introduced for the Ternary Content-Addressable Memory (TCAM) and NFT.

TCAM

You can now view the Ternary Content-Addressable Memory (TCAM) utilization for each control plane TCAM entry.

Command: show platform hardware pp active tcam utilization control-plane-sessions

NFT