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Manual Shutdown of a Member Interface in the Eth-Trunk on the NE5000E Affects Other Member Interfaces

Publication Date:  2013-09-03 Views:  74 Downloads:  0
Issue Description
Networking:

NE5000E======ODF=======MA5200G

The MA5200G connects to the NE5000E through two GE links that are added to Eth-Trunk 1. An ODF is deployed between the two devices.

GE1/0/0 and GE9/0/0 on the NE5000E are added to Eth-Trunk 1. When one member interface is shut down, the other member interface goes Down.
The initial status is as follows:
-----------------------------------------------------
PortName                   Status Weight
-----------------------------------------------------
GigabitEthernet1/0/0 UP 1
GigabitEthernet9/0/0 UP 1
-----------------------------------------------------

When GE1/0/0 is shut down, GE9/0/0 goes Down, as shown in the following:
-----------------------------------------------------
PortName                   Status Weight
-----------------------------------------------------
GigabitEthernet1/0/0 DOWN 1
GigabitEthernet9/0/0 DOWN 1
-----------------------------------------------------
Handling Process
Bind other interfaces on the NE5000E to Eth-Trunk 1, the fault persists. The interfaces and slots are correct. When the optical fiber is removed from GE1/0/0, GE9/0/0 goes Down; when the optical fiber is removed from GE9/0/0, GE1/0/0 goes Down. Therefore, the two links are likely to be incorrectly connected on the ODF. For details, see the following diagram:

Incorrect connections:

NE5000E                                 MA5200G
GE1/0/0             ODF                GE1/0/0
receiving                                                        sending
--------------------1==3--------------------
--------------------2==4--------------------
sending                                                       receiving             
receiving                                                        sending
--------------------3==1--------------------
--------------------4==2--------------------
sending                                                        receiving
GE9/0/0                                        GE2/0/0


Correct connections:
NE5000E                                 MA5200G
GE1/0/0             ODF                GE1/0/0
receiving                                                        sending
--------------------1==1--------------------
--------------------2==2--------------------
sending                                                        receiving             
receiving                                                        sending
--------------------3==3--------------------
--------------------4==4--------------------
sending                                                        receiving
GE9/0/0                                       GE2/0/0


Root Cause
N/A
Solution
Perform local loopback and locate the ODF position. Correct the connections. The fault is rectified.

END