■SW1_2950投入コンフィグ
conf t
!
vlan 101,102,103
!
interface range fa0/1 - 4
switchport mode trunk
switchport trunk allowed vlan 101,102,103
channel-group 1 mode on
!
end


■SW2_2950投入コンフィグ
conf t
!
vlan 101,102,103
!
interface range fa0/1 - 4
switchport mode trunk
switchport trunk allowed vlan 101,102,103
channel-group 1 mode on
!
end


■EtherChannelのポート確認
SW1_2950#sh etherchannel summary
Flags: D - down P - in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
u - unsuitable for bundling
U - in use f - failed to allocate aggregator
d - default port

Number of channel-groups in use: 1
Number of aggregators: 1

Group Port-channel Protocol Ports

                                                                                                                                                              • -

1 Po1(SU) - Fa0/1(Pd) Fa0/2(P) Fa0/3(P)
Fa0/4(P)


■port-channelインターフェイスに関連付けされた物理ポートの確認
SW1_2950#sh interfaces port-channel 1
Port-channel1 is up, line protocol is up (connected)
Hardware is EtherChannel, address is 000d.2903.e681 (bia 000d.2903.e681)
MTU 1500 bytes, BW 400000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
Members in this channel: Fa0/1 Fa0/2 Fa0/3 Fa0/4
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:06:16, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1000 bits/sec, 2 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
995 packets input, 78164 bytes, 0 no buffer
Received 831 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 831 multicast, 0 pause input
0 input packets with dribble condition detected
264 packets output, 25872 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out