Switch(config)#interface range fastEthernet 0/23 - 24
Switch(config-if-range)#channel-protocol [ lacp | pagp ]
Switch(config-if-range)#channel-group 1 mode [ active | auto | desirable | on | passive ]
*Note:
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
Switch(config-if-range)#channel-group 1 mode desirable
Creating a port-channel interface Port-channel 1
Example:
R3#configure terminal
R3(config)#interface range fastEthernet 1/14 - 15
R3(config-if-range)#channel-group 1 mode on
Creating a port-channel interface Port-channel1
*Mar 1 00:02:08.715: %EC-5-BUNDLE: Interface Fa1/14 joined port-channel Po1
*Mar 1 00:02:08.787: %EC-5-BUNDLE: Interface Fa1/15 joined port-channel Po1
*Mar 1 00:02:11.663: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
R4#configure terminal
R4(config)#interface range fastEthernet 1/14 - 15
R4(config-if-range)#channel-group 1 mode on
Creating a port-channel interface Port-channel1
*Mar 1 00:01:33.795: %EC-5-BUNDLE: Interface Fa1/14 joined port-channel Po1
*Mar 1 00:01:33.971: %EC-5-BUNDLE: Interface Fa1/15 joined port-channel Po1
*Mar 1 00:01:36.735: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
R4#show ip interface brief | include Port-channel
Port-channel1 unassigned YES unset up up
R4#show ip interface brief | include up
FastEthernet1/14 unassigned YES unset up up
FastEthernet1/15 unassigned YES unset up up
Port-channel1 unassigned YES unset up up
R4#show etherchannel load-balance
Po1 ---> Source XOR Destination IP address
R4#show etherchannel 1 brief
Group state = L2
Ports: 2 Maxports = 8
Port-channels: 1 Max Port-channels = 1
R4#show etherchannel 1 detail
Group state = L2
Ports: 2 Maxports = 8
Port-channels: 1 Max Port-channels = 1
Ports in the group:
-------------------
Port: Fa1/14
------------
Port state = Up Mstr In-Bndl
Channel group = 1 Mode = On/FEC Gcchange = 0
Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1
Port index = 0
Age of the port in the current state: 00d:00h:07m:42s
Port: Fa1/15
------------
Port state = Up Mstr In-Bndl
Channel group = 1 Mode = On/FEC Gcchange = 0
Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1
Port index = 1
Age of the port in the current state: 00d:00h:07m:42s
Port-channels in the group:
----------------------
Port-channel: Po1
------------
Age of the Port-channel = 00d:00h:07m:45s
Logical slot/port = 8/0 Number of ports = 2
GC = 0x00010001 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Ports in the Port-channel:
Index Port EC state
------+------+------------
0 Fa1/14 on
1 Fa1/15 on
Time since last port bundled: 00d:00h:07m:45s Fa1/15
R4#show etherchannel 1 port
Ports in the group:
-------------------
Port: Fa1/14
------------
Port state = Up Mstr In-Bndl
Channel group = 1 Mode = On/FEC Gcchange = 0
Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1
Port index = 0
Age of the port in the current state: 00d:00h:08m:05s
Port: Fa1/15
------------
Port state = Up Mstr In-Bndl
Channel group = 1 Mode = On/FEC Gcchange = 0
Port-channel = Po1 GC = 0x00010001 Pseudo port-channel = Po1
Port index = 1
Age of the port in the current state: 00d:00h:08m:05s
R4#show etherchannel 1 port-channel
Port-channels in the group:
----------------------
Port-channel: Po1
------------
Age of the Port-channel = 00d:00h:08m:17s
Logical slot/port = 8/0 Number of ports = 2
GC = 0x00010001 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Ports in the Port-channel:
Index Port EC state
------+------+------------
0 Fa1/14 on
1 Fa1/15 on
Time since last port bundled: 00d:00h:08m:17s Fa1/15
R4#show etherchannel 1 summary
Flags: D - down P - in port-channel
I - stand-alone s - suspended
R - Layer3 S - Layer2
U - in use
Group Port-channel Ports
-----+------------+-----------------------------------------------------------
1 Po1(SU) Fa1/14(P) Fa1/15(P)
L3 EtherChannel
R3(config)#interface port-channel 1
R3(config-if)#ip address 10.1.1.1 255.255.255.0
% IP addresses may not be configured on L2 links.
R3(config-if)#no switchport
Command rejected: Not a convertable port.
R3(config-if)#exit
R3(config)#interface range fastEthernet 1/14 - 15
R3(config-if-range)#no channel-group 1 mode on
R3(config-if-range)#interface Port-channel1
R3(config-if)#no switchport
R3(config-if)#ip address 10.1.1.1 255.255.255.0
R3(config-if)#interface range fastEthernet 1/14 - 15
R3(config-if-range)#no switchport
R3(config-if-range)#channel-group 1 mode on
*Note: All ports must use same speed and duplex (HARD CODE !)
*Note: Interfaces in a bundle are redundant
*Note: No interfaces in bundle can be span ports
*Note: Interfaces in bundle must be in same VLAN / Trunk
*Note: Any changes to Port-Channel affects all bundled ports
*Note: Any changes to individual ports affect only that port
