EtherChannel でガチャガチャいじくって遊んでたら err-disabled になった

ちなみに再起動しても err-disabled のままとのこと。
再起動したら( config 保存してないから) EtherChannel の設定も消えて err-disabled もなかったから(なぜなら Po1 インタフェース自体存在しなくなるから)、
たぶん config 保存した状態でリブートしたらそうなるって感じかな。

interface configuration mode に入ってから

shutdown
no shutdown

するのがポイント。

*Mar  2 00:06:25.742: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Fa0/1, putting Fa0/1 in err-disable state
*Mar  2 00:06:25.742: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Fa0/2, putting Fa0/2 in err-disable state
*Mar  2 00:06:25.750: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po1, putting Fa0/1 in err-disable state
*Mar  2 00:06:25.750: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po1, putting Fa0/2 in err-disable state
*Mar  2 0
ASW1#0:06:25.750: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po1, putting Po1 in err-disable state
*Mar  2 00:06:25.767: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down
*Mar  2 00:06:26.749: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
*Mar  2 00:06:26.749: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down
ASW1#sh int po1
Port-channel1 is down, line protocol is down (err-disabled)
  Hardware is EtherChannel, address is 0022.bd89.2182 (bia 0022.bd89.2182)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed, link type is auto, media type is unknown
  input flow-control is off, output flow-control is unsupported

回復させる

ASW1#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
ASW1(config)#int shu
ASW1(config)#int po1
ASW1(config-if)#shu
ASW1(config-if)#shutdown
ASW1(config-if)#no shu
ASW1(config-if)#no shutdown
*Mar  2 00:12:36.888: %LINK-5-CHANGED: Interface FastEthernet0/1, changed state to administratively down
*Mar  2 00:12:36.888: %LINK-5-CHANGED: Interface FastEthernet0/2, changed state to administratively down
*Mar  2 00:12:36.888: %LINK-5-CHANGED: Interface Port-channel1, changed state to administratively down
ASW1(config-if)#no shutdown
ASW1(config-if)#^Z
ASW1#
*Mar  2 00:12:43.204: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
*Mar  2 00:12:43.204: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to up
*Mar  2 00:12:43.213: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to up
ASW1#
*Mar  2 00:12:43.380: %SYS-5-CONFIG_I: Configured from console by console
*Mar  2 00:12:44.211: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
*Mar  2 00:12:44.211: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
*Mar  2 00:12:44.219: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
ASW1#sh e
ASW1#sh eth
ASW1#sh etherchannel 1 su
ASW1#sh etherchannel 1 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(SU)          -        Fa0/1(P)    Fa0/2(P)

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