EtherChannel
- Implementation restrictions
- Interface types can not be mixed. (Fast Ethernet and Gigabit Ethernet)
- Maximum interfaces in one logic link = 8 active physical interfaces = 16 physical interfaces
- Maximum logic links = 6 logic links on one switch
- The configuration of the both side physical ports should be the same.
AutoNegotiation Protocols
PAgp (Port Aggregation Protocol) [Cisco proprietary]
- Mode
- On (No negotiate, the EtherChannel will be formed until the other side’s mode is On as well)
- Desirable (active negotiation)
- Auto (passive negotiation)
LACP (Link Aggregation Control Protocol) [IEEE]
- Mode
- On (No negotiate, the EtherChannel will be formed until the other side’s mode is On as well)
- LACP Active (active negotiation)
- LACP Passive (passive negotiation)
Configuration
(config)# interface port-channel 1
(config)# interface range f0/1-2
(config-if)# channel-group 1 mode [LACP or PAgP mode]