Cisco IOS Software Release Notes

• Release Notes for Cisco IOS Release 12.1 E on the Catalyst 6500 MSFC
  For Cisco IOS Release 12.1(27b)E and all earlier 12.1 E releases

Release Notes for Cisco IOS on the Supervisor Engine and MSFC

• Release Notes for Cisco IOS Release 12.1 E on the Catalyst 6000 and Cisco 7600 Supervisor Engine and MSFC
  For Cisco IOS Release 12.1(27b)E and all earlier 12.1 E releases

• Release Notes for Cisco IOS Release 12.2SX on the Supervisor Engine 720, Supervisor Engine 32, and Supervisor Engine 2
  For Cisco IOS Release 12.2(18)SXF and rebuilds and all earlier 12.2SX releases

• Release Notes for Cisco IOS Release 12.2SR for the Cisco 7600 Series Routers
  Includes information about feature support, determining and upgrading software, new feature descriptions, release-specific important notes, severity 1 and 2 open and resolved caveats, and related documentation.