Cisco IOS Release 15.1M&T Release Notes
Quick guide to Cisco IOS Release 15.1M&T, covering system requirements, supported hardware platforms, software version verification, and troubleshooting resources.
Table of contents
Quick guide from the manual
This document provides release notes for Cisco IOS Release 15.1M&T. It covers system requirements, supported hardware, software version verification, and troubleshooting resources.
Supported Hardware Platforms
Cisco IOS Release 15.1M&T supports the following hardware platforms:
- Cisco 800, 1800, 1900, 2800, 2900, 3800, 3900 series routers
- Cisco AS5350XM and AS5400XM universal gateways
- Cisco CGR 2000 series
- Cisco IAD2430 and IAD2801 series integrated access devices
- Cisco Unified Communications 500 series
- Cisco VG200 series analog voice gateways
- Cisco VGD 1 T3 voice gateways
Determining Your Software Version
To check the version of Cisco IOS software currently running on your device, log in to the device and enter the following command:
Router> show version
Upgrading and MIBs
For selecting a new software release, use the Cisco Feature Navigator. To identify defects affecting specific software, use the Bug Toolkit. MIBs can be located and downloaded using the Cisco MIB Locator.
Troubleshooting
The manual provides links to troubleshooting resources for the following issues:
- Hardware troubleshooting
- Bus error exceptions
- Configuration loss during reboot
- Router hangs
- Memory problems
- High CPU utilization
- Router crashes
- Using CAR during DOS attacks
Manufacturer information
Cisco Systems, Inc.
Practical help
Common problems
Consult the 'Why Does My Router Lose Its Configuration During Reboot?' technical note.
Consult the 'Troubleshooting High CPU Utilization on Cisco Routers' technical note.
Consult the 'Troubleshooting Router Crashes' technical note.
Before use
- Verify current software version using 'show version' command
- Check supported hardware list to ensure compatibility
- Review field notices for the release
- Ensure access to Cisco.com for MIB downloads
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.