Cisco IOS Release 15.6M&T supports platforms within the following Cisco series:

• Cisco 800 Series Industrial Integrated Services Routers
• Cisco 800 and 800M Series Integrated Services Routers
• Cisco 1000 Series Connected Grid Routers (CGR 1000)
• Cisco 2000 Series Connected Grid Router (CGR 2000)
• Cisco 1900 Series Integrated Services Routers
• Cisco 2900 Series Integrated Services Routers
• Cisco 3900 Series Integrated Services Routers
• Cisco Analog Voice Gateways (VG202XM and VG204XM)
• Cisco High Density Analog Voice Gateways (VG350)

For more information about the platforms supported in Cisco IOS Release 15.6M&T, see the “Platform-Specific Information” section on page 9 .

To determine the version of Cisco IOS software that is currently running on your Cisco network device, log in to the device and enter the show version user EXEC command:

Router> show version
Cisco IOS Software, 7200 Software (C7200-ADVENTERPRISEK9-M), Version 15.6(1) T, RELEASE SOFTWARE

For information about selecting a new Cisco IOS software release, see How to Choose a Cisco IOS Software Release at the following URL:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1834/products_tech_note09186a00800fb9d9.shtml

For information about updating or upgrading Cisco IOS software, see How to Update/Upgrade Cisco IOS Software at the following URL:

http://www.cisco.com/en/US/prod/iosswrel/networking_solutions_products_genericcontent0900aecd806ea5be.html

Platform-specific documents may also provide information about upgrading to a new software release:

• Cisco 800 Series Industrial Integrated Services Routers: http://www-author.cisco.com/c/en/us/support/routers/800-series-industrial-routers/products-installation-guides-list.html

• Cisco 800 series routers:http://www.cisco.com/en/US/products/hw/routers/ps380/prod_installation_guides_list.html

• Cisco IR 800 series routers: https://www.cisco.com/c/en/us/support/routers/800-series-industrial-routers/tsd-products-support-series-home.html

• Cisco 1000 CGR series routers http://www.cisco.com/c/en/us/support/routers/1000-series-connected-grid-routers/products-installation-and-configuration-guides-list.html

• Cisco 2000 CGR series routers:http://www.cisco.com/en/US/products/ps10977/prod_installation_guides_list.html

• Cisco 1900 series routers: http://www.cisco.com/en/US/docs/routers/access/1900/hardware/installation/guide/1900_HIG.html

• Cisco 2900 and 3900 series routers: http://www.cisco.com/en/US/docs/routers/access/2900/hardware/installation/guide/Hardware_Installation_Guide.html

• Cisco 5900 Embedded Services Routers: http://www.cisco.com/c/en/us/support/routers/5900-series-embedded-services-routers/products-installation-guides-list.html

• Cisco VG202XM and Cisco VG204XM Voice Gateways: http://www.cisco.com/en/US/docs/routers/access/vg202_vg204/hardware/vg2_vg4hw.html

• Cisco VG350 Voice Gateway: http://www.cisco.com/en/US/docs/routers/access/vg350/hardware/installation/guide/vg350_hig.html

For instructions on ordering a Cisco IOS upgrade, see the document at the following location: http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/957_pp.html.

To choose a new Cisco IOS software release by comparing feature support or memory requirements, use Cisco Feature Navigator. Cisco Feature Navigator is a web-based tool that enables you to determine which Cisco IOS software images support a specific set of features and which features are supported in a specific Cisco IOS image. You can search by feature or by feature set (software image). Under the release section, you can compare Cisco IOS software releases side by side to display both the features unique to each software release and the features that the releases have in common.

To choose a new Cisco IOS software release based on information about defects that affect that software, use Bug Toolkit at the following URL: http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl.