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Etherchannel

Etherchannel

There are three types of Etherchannels negotiation mechanism
  • PAgP  (Port Aggregation Protocol)- Cisco’s proprietary negotiation protocol
  • LACP (Link Aggregation Protocol)  – Standards-based negotiation protocol
  • Static Persistence (“On”) – No negotiation protocol is used

There are two types of Etherchannels 1) Layer2   2) Layer3
1) Layer2 Etherchannels:
Switch1(config)# interface range gigabitethernet0/1 -4 
Switch1(config-if-range)# switchport access vlan 100
Switch1(config-if-range)# channel-group 5 mode ?
active–Enable LACP unconditionally
auto–Enable PAgP only if a PAgP device is detected
desirable–Enable PAgP unconditionally
on–Enable Etherchannel only “Manual On Mode”
passive–Enable LACP only if a LACP device is detected
Switch1(config-if-range)# channel-group 5 mode desirable
2) Layer 3 Etherchannels:
Switch1(config)# interface port-channel 2
Switch1(config-if)# no switchport
Switch1(config-if)# ip address 172.16.1.10 255.255.255.0
Switch1(config-if)# end

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