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Eth-trunk down but the service is normal

Created: Jun 29, 2019 02:44:13Latest reply: Jun 29, 2019 06:45:34 215 2 0 0
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The CE6850 is directly connected to the server. We find that the Eth-trunk is Down but the physical interface is Up and can ping the server from the switch. Why does this happen? How to solve it?

 

disp int eth 1 breif

-------------------------------------------------------------------------------------------------
Eth-Trunk       down     down         0%     0%             0          0

  GE1/0/1     up         up         0.01%   0.01%          0          0

  GE2/0/1     up        up            0%    0.01%          0          0

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

disp cu int eth 1

interface Eth-Trunk 1

 port link-type trunk

 port trunk pvid vlan 2000

 port trunk allow-pass vlan 100 to 200

 stp edged-port enable

 mode lacp-dynamic

 lacp timeout fast

 


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Popeye_Wang
Admin Created Jun 29, 2019 02:48:45 Helpful(0) Helpful(0)

Hi, Hobbit,

You have configured the dynamic LACP. In this mode, when the NIC binding mode of the server is not LACP, the Eth-Trunk becomes Down after an LACP negotiation failure, but its member interfaces inherit VLAN attributes of the Eth-Trunk and enter the Indep state. The member interfaces can still forward data at Layer 2.
 Eth-trunk down but the service is normal-2983067-1
You can use the display LACP statistics eth-trunk 1 command to check whether the LACPDU is received. 
And Run the display eth-trunk command to check the Eth-Trunk information, if no LACPDU is received, the status of member interfaces would be Indep.

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Popeye_Wang
Popeye_Wang Admin Created Jun 29, 2019 02:48:45 Helpful(0) Helpful(0)

Hi, Hobbit,

You have configured the dynamic LACP. In this mode, when the NIC binding mode of the server is not LACP, the Eth-Trunk becomes Down after an LACP negotiation failure, but its member interfaces inherit VLAN attributes of the Eth-Trunk and enter the Indep state. The member interfaces can still forward data at Layer 2.
 Eth-trunk down but the service is normal-2983067-1
You can use the display LACP statistics eth-trunk 1 command to check whether the LACPDU is received. 
And Run the display eth-trunk command to check the Eth-Trunk information, if no LACPDU is received, the status of member interfaces would be Indep.

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Hobbit
Hobbit Created Jun 29, 2019 06:45:34 Helpful(0) Helpful(0)

Thanks, We have checked that the switch does not receive the LACPDU. We will check the server configuration.
display lacp statistics eth-trunk 1
  Eth-Trunk1's PDU statistics is:                                                
-------------------------------------------------------------------------------
Port              LacpRevPdu   LacpSentPdu   MarkerRevPdu  MarkerSentPdu
GE1/0/1                0                       7210                    0                   0            
GE2/0/1                0                       7284                    0                   0
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