How do Cisco Line Protocol works ?

I could read this: https://www.cisco.com/c/en/us/support/docs/content-networking/keepalives/118390-technote-keepalive-00.html, about Ethernet Interfaces keepalive mechanisms .

Is this mechanism up to date ? Especially regarding modern technologies like GigabitEthernet and TenGigabitEthernet .

Are those the same techniques for optical fibers?

  • 2
    Do you have a practical problem with a serial line? The keepalive mechanism is something you add on top of various protocols. – Zac67 Mar 1 at 15:49
  • Typically for the data link layer connection detection for Cisco devices. The second UP status of the interface. – bdes31 Mar 2 at 8:47

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