Saturday, December 14, 2019

Networking-Cisco IOS vs Cisco NXOS and CatOS

  • Cisco nexus NXOS does not support login command to switch users.
  • Cisco nexus NXOS does not distinguish between standard or extended access list, all lists are named and "extended" in functionality.
  • Cisco NXOS did not support scp server prior to the release od version 5.1(1).
  • In cisco NXOS there is no "write" command to save the configuration like on IOS. We need to use Copy command instead of write command. We can also use command aliases to provide write command.
  • When accessing cisco NXOS, users authenticate directly to their assigned privilege level.
  • SSH server is enabled while telnet is disabled by default in Cisco Nexus device.
Cisco CatOS:
  • Mostly we can see CatOS on catalyst switches. Which works with high speed based on input.
  • CatOS is a catalyst operating system which is a discontinued operating system for many of the catalyst brand of legacy network switches. CatOS ran on switches such as 1200,2800G, 4000,4500,5000,5500,6000,6500 series. It was originally called as XDI by the switching company cresendo communications, Inc. Cisco renamed it to CatOS when they acquired cresendo in late 1993.
  • CatOS can still run on some of cisco's modular switches, "hybrid mode". In hybrid mode, the network management processor (NMP) or switch Processor (SP) runs CatOS and the route processor runs Cisco IOS.

Hill Station view:

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