cisco 交换机3560与6509做汇聚的时候碰到的问题

其中一个接口成功做成了汇聚，但是其中另一个就是不亮！问题描述如下：


swb:

swb#show run int fa0/2
Building configuration...

Current configuration : 121 bytes
!
interface FastEthernet0/2
switchport access vlan 100
switchport mode dynamic desirable
channel-group 1 mode on
end



swb#show run int fa0/11
Building configuration...

Current configuration : 100 bytes
!
interface FastEthernet0/11
switchport access vlan 100
duplex full
channel-group 1 mode on
end


interface Port-channel1
switchport access vlan 100
end

swb#show 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) - Fa0/2(P) Fa0/11(D)



swb#show etherchannel 1 detail
Group state = L2
Ports: 2 Maxports = 8
Port-channels: 1 Max Port-channels = 1
Protocol: -
Minimum Links: 0
Ports in the group:
-------------------
Port: Fa0/2
------------

Port state = Up Mstr In-Bndl
Channel group = 1 Mode = On Gcchange = -
Port-channel = Po1 GC = - Pseudo port-channel = Po1
Port index = 0 Load = 0x00 Protocol = -

Age of the port in the current state: 0d:00h:08m:45s

Port: Fa0/11
------------

Port state = Down Not-in-Bndl
Channel group = 1 Mode = On Gcchange = -
Port-channel = null GC = - Pseudo port-channel = Po1
Port index = 0 Load = 0x00 Protocol = -

Age of the port in the current state: 0d:00h:03m:44s

Port-channels in the group:
---------------------------

Port-channel: Po1
------------

Age of the Port-channel = 0d:00h:16m:23s
Logical slot/port = 2/1 Number of ports = 1
GC = 0x00000000 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = -
Port security = Disabled

Ports in the Port-channel:

Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 00 Fa0/2 On 0

Time since last port bundled: 0d:00h:03m:45s Fa0/11
Time since last port Un-bundled: 0d:00h:03m:45s Fa0/11

swb#









swa:


swa#show run int fa0/1
Building configuration...

Current configuration : 172 bytes
!
interface FastEthernet0/1
switchport access vlan 100
switchport trunk encapsulation dot1q
switchport mode access
speed 100
duplex full
channel-group 1 mode on
end

swa#show run int fa0/2
Building configuration...

Current configuration : 110 bytes
!
interface FastEthernet0/2
switchport access vlan 100
switchport mode access
channel-group 1 mode on
end

swa#


swa#show run int port-ch
swa#show run int port-channel 1
Building configuration...

Current configuration : 83 bytes
!
interface Port-channel1
switchport access vlan 100
switchport mode access
end

swa#


swa#show 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(D) Fa0/2(P)

swa#


swa#show etherchannel 1 detail
Group state = L2
Ports: 2 Maxports = 8
Port-channels: 1 Max Port-channels = 1
Protocol: -
Minimum Links: 0
Ports in the group:
-------------------
Port: Fa0/1
------------

Port state = Down Not-in-Bndl
Channel group = 1 Mode = On Gcchange = -
Port-channel = null GC = - Pseudo port-channel = Po1
Port index = 0 Load = 0x00 Protocol = -

Age of the port in the current state: 0d:00h:09m:01s

Port: Fa0/2
------------

Port state = Up Mstr In-Bndl
Channel group = 1 Mode = On Gcchange = -
Port-channel = Po1 GC = - Pseudo port-channel = Po1
Port index = 0 Load = 0x00 Protocol = -

Age of the port in the current state: 0d:00h:11m:12s

Port-channels in the group:
---------------------------

Port-channel: Po1
------------

Age of the Port-channel = 0d:00h:19m:06s
Logical slot/port = 2/1 Number of ports = 1
GC = 0x00000000 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = -
Port security = Disabled

Ports in the Port-channel:

Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 00 Fa0/2 On 0

Time since last port bundled: 0d:00h:09m:02s Fa0/1
Time since last port Un-bundled: 0d:00h:06m:49s Fa0/1

swa#
swa#
swa#

FastEthernet0/1 is down, line protocol is down (notconnect)
Hardware is Fast Ethernet, address is 001e.14cf.0883 (bia 001e.14cf.0883)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, 100Mb/s, media type is 10/100BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:08, output 00:00:13, 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
159 packets input, 21834 bytes, 0 no buffer
Received 1 broadcasts (96 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 96 multicast, 0 pause input
0 input packets with dribble condition detected
436 packets output, 41811 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




swa#show int fa0/1
FastEthernet0/1 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 001e.14cf.0883 (bia 001e.14cf.0883)
MTU 1500 bytes, BW 100000 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, media type is 10/100BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output 00:00:01, 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
155 packets input, 21548 bytes, 0 no buffer
Received 1 broadcasts (94 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 94 multicast, 0 pause input
0 input packets with dribble condition detected
434 packets output, 41683 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
swa#conf t



总之一句话，speed 100不能打进去，一打进去，接口的灯就直接灭了。。。
做汇聚，几个有用的故障排除命令：


show etherch 1 summary
show etherch 1 detail

如果是绑定两一个接口，一个已经绑定成功，另一个没有的话，可以通过命令，可以直接查看到原因的！


//不是很正式，随便写写。。。


好像最近总在这种似乎很简单的事情上卡壳，郁闷的说！