## Etherchannel

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 ## Defination:
         
  It is the aggregation(bundle) of 2 or more redundant links to form a logical channel.



##  Important points to remember while applying an Etherchannel:
 
 - Changes applied to the logical channel will effect all the    bundled ports into it.
 
 - Changes applied to the single interface of that logical      channel, will effect only that individual ports.
 
 - None of the bundled ports should be SPAN Ports.

 - All the bundled ports should be in same Vlan.

 - All the bundled ports should be redundant, and should        have same speed and duplex.



## Two Protocols for Etherchannel:
1. Port Aggregation Protocol (PAgP)
   
   - Cisco proprietary.
   - Modes are Desirable, Auto, ON.

2. Link Aggregation Control Protocol (LACP)

   - Industry Standard.
   - Modes are Active, Passive, ON.



##  IMPORTANT THING TO REMEMBER:

  When applying "ON" as Mode, YOU MUST NOT USE PAgP and LACP OR even if you try to... then the  switch will NOT ALLOW IT.




##  Configuration:

 Check the "Networks Practically" link under the "PAGES" section in this website for the configuration.



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