EtherChannel

Etherchannel:-
++increases BW load balances traffic overall all links
++upto 8 links can be used
++can use L3 and L2
++Two negotiation protocols i.e; Pagp and LACP

PAGP(port agg protocol):-
++cisco proprietary
++port modes= AUTO,DESIRABLE,ON
Auto:-doest not initiate negotiation. but responds to pagp packets.
Desirable:-initiates negotiation and responds.
ON:-no negotiation, other end should also be in ON mode.

LACP(Link agg protocol):-
++can used for other vendor
++port modes= ACTIVE,PASSIVE,ON
Active:-initiates negotiation and resoponds.
Passive:-does not initiate negotiation. but responds to pagp packets.
ON:-no negotiation, other end should also be in ON mode.

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