■DSW1_3750投入コンフィグ
conf t
!
interface port-channel 1
no switchport
ip address 172.16.101.1 255.255.255.0
exit
!
interface range fa1/0/1 - 4
no switchport
no ip address
channel-group 1 mode active
!
end


■DSW3_3560投入コンフィグ
conf t
!
interface port-channel 1
no switchport
ip address 172.16.101.2 255.255.255.0
exit
!
interface range fa0/1 - 4
no switchport
no ip address
channel-group 1 mode passive
!
end


■EtherChannelのポート確認
DSW1_3750#sh etherchannel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator

M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port


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

Group Port-channel Protocol Ports

                                                                                                                                                              • -

1 Po1(RU) LACP Fa1/0/1(P) Fa1/0/2(P) Fa1/0/3(P)
Fa1/0/4(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
DSW1_3750#sh interfaces port-channel 1
Port-channel1 is up, line protocol is up (connected)
Hardware is EtherChannel, address is 0013.6030.3ac1 (bia 0013.6030.3ac1)
Internet address is 172.16.101.1/24
MTU 1500 bytes, BW 400000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, link type is auto, media type is unknown
input flow-control is off, output flow-control is unsupported
Members in this channel: Fa1/0/1 Fa1/0/2 Fa1/0/3 Fa1/0/4
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:01:28, output 00:01:28, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
86 packets input, 18903 bytes, 0 no buffer
Received 50 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 49 multicast, 0 pause input
0 input packets with dribble condition detected
65 packets output, 8456 bytes, 0 underruns
0 output errors, 0 collisions, 2 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