New Style and Legacy Config-Mode

[Joy3]

Hallo,

I am finding it difficult to understand these two configuration modes even after reading the Cisco documentation on it. Could anyone kindly explain this to me in layman's term. Thank you

R1#authentication display config-mode
Current configuration mode is legacy

R5# authentication display config-mode
Current configuration mode is new-style

[Rob Ingram · Accepted solution]

@Joy3 this is referring to the IBNS related configuration command syntax of the switches. With new-style referring to IBNS 2.0, which allows for templates (which reduces configuration complexity) and differentiated authentication amongst other features. This ISE wired prescriptive guide compares IBNS version 1.0 and 2.0 - https://community.cisco.com/t5/security-knowledge-base/ise-secure-wired-access-prescriptive-deployment-guide/ta-p/3641515#toc-hId-1020565451

[Charlie Moreton]

This is to enable C3PL, or more precisely, if C3PL is enabled, then new-style is used.  Otherwise, legacy is used.

https://www.cisco.com/c/en/us/td/docs/routers/access/cisco_router_and_security_device_manager/24/software/user/guide/C3PL.html

[Joy3]

Thanks @Rob Ingram and @Charlie Moreton That's very helpful