Etherchannel Pagp and LACP

Etherchannel Pagp and LACP

when configuring Etherchannel, we have the following options:

active     Enable LACP unconditionally
  auto       Enable PAgP only if a PAgP device is detected
  desirable  Enable PAgP unconditionally
  on         Enable Etherchannel only
  passive    Enable LACP only if a LACP device is detected


the one option that I do not understand is the "ON" option, whether it is is used for Pagp or LACP or for Both.

Thank you
jskfanAsked:
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JustInCaseCommented:
ON - is for neither. ON - means that there is no control protocol present (PAgP or LACP), interfaces will just be bundled into etherchannel. Since there is no control protocol, there is a risk of creating loop, so ON should be avoided if both sides support PAgP or LACP.
jskfanAuthor Commented:
So what is the purpose of having  the option "ON " ?
JustInCaseCommented:
Some devices may not support LACP, PAgP or any of those, have some limitations, or devices for some reason do not properly negotiate Etherchannel creation via dynamic protocol negotiation (e.g. older devices or the VMware or ...). If dynamic Etherchannel negotiation is not available -  mode ON can be the only option available to create Etherchannel (Link Aggregation).

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jskfanAuthor Commented:
Thank you !
JustInCaseCommented:
You're welcome.
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