[c-nsp] 3750 etherchannel only using 1 port

Paul paul at gtcomm.net
Tue May 6 12:40:25 EDT 2008


C3750 Software (C3750-ADVIPSERVICESK9-M), Version 12.2(44)SE1, RELEASE 
SOFTWARE (fc1)

Running two etherchannels with two gig ports not cross stack.  Here's an 
example of one of them.
What's happening is that only one port is being used for outgoing 
traffic, no matter what I set the port-channel load-balance to.     Is 
etherchannel broken in 12.2.44SE1? This is a new setup.



!
interface GigabitEthernet1/0/1
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 5,11
 switchport mode trunk
 load-interval 30
 channel-group 1 mode active
end
interface GigabitEthernet1/0/2
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 5,11
 switchport mode trunk
 load-interval 30
 channel-group 1 mode active
end

interface Port-channel1
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 5,11
 switchport mode trunk
 load-interval 30
end

Group state = L2
Ports: 2   Maxports = 16
Port-channels: 1 Max Port-channels = 16
Protocol:   LACP
Minimum Links: 0
                Ports in the group:
                -------------------
Port: Gi1/0/1
------------

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

Flags:  S - Device is sending Slow LACPDUs   F - Device is sending fast 
LACPDUs.
        A - Device is in active mode.        P - Device is in passive mode.

Local information:
                            LACP port     Admin     Oper    Port        Port
Port      Flags   State     Priority      Key       Key     Number      
State
Gi1/0/1   SA      bndl      32768         0x1       0x1     0x1         0x3D

Partner's information:

                  LACP port                        Admin  Oper   Port    
Port
Port      Flags   Priority  Dev ID          Age    key    Key    Number  
State
Gi1/0/1   SA      32768     0015.175d.1800   2s    0x0    0x1D0  0x2     
0x3D

Age of the port in the current state: 11d:12h:50m:38s

Port: Gi1/0/2
------------

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

Flags:  S - Device is sending Slow LACPDUs   F - Device is sending fast 
LACPDUs.
        A - Device is in active mode.        P - Device is in passive mode.

Local information:
                            LACP port     Admin     Oper    Port        Port
Port      Flags   State     Priority      Key       Key     Number      
State
Gi1/0/2   SA      bndl      32768         0x1       0x1     0x2         0x3D

Partner's information:

                  LACP port                        Admin  Oper   Port    
Port
Port      Flags   Priority  Dev ID          Age    key    Key    Number  
State
Gi1/0/2   SA      32768     0015.175d.1800   2s    0x0    0x1D0  0x3     
0x3D

Age of the port in the current state: 11d:12h:50m:36s

                Port-channels in the group:
                ---------------------------
Port-channel: Po1    (Primary Aggregator)

------------

Age of the Port-channel   = 11d:12h:51m:07s
Logical slot/port   = 10/1          Number of ports = 2
HotStandBy port = null
Port state          = Port-channel Ag-Inuse
Protocol            =   LACP
Port security       = Disabled

Ports in the Port-channel:

Index   Load   Port     EC state        No of bits
------+------+------+------------------+-----------
  0     00     Gi1/0/1  Active             0
  0     00     Gi1/0/2  Active             0

Time since last port bundled:    11d:12h:50m:44s    Gi1/0/2



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