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Eth-Trunk Configuation Error because the ports configuration are not default

Publication Date:  2014-09-12 Views:  6225 Downloads:  0

Issue Description

Trying to add two physical ports to an eth-trunk
[S9300-GigabitEthernet2/0/2]eth-trunk 0
Error: The port has other configurations. Please clear them first.

Configuration as below:
interface Eth-Trunk 0
 stp disable

interface GigabitEthernet2/0/0
stp disable
interface GigabitEthernet2/0/2
stp disable

Alarm Information

[S9300-GigabitEthernet2/0/2]eth-trunk 0
Error: The port has other configurations. Please clear them first.

Handling Process

1.Set STP enable on the physical ports. 
2.add them to ETH-TRUNK 0 from interface view.
stp enable [enter]
eth-trunk 0 [enter]
stp enable [enter]
eth-trunk 0 [enter]

Root Cause

According to Product manual:
When adding an interface to an Eth-Trunk, pay attention to the following points:

  • An Eth-Trunk contains a maximum of eight member interfaces.
  • A member interface cannot be configured with any service or static MAC address.
  • When adding an interface to an Eth-Trunk, ensure that the interface is a hybrid interface, which is the default interface type.
  • An Eth-Trunk cannot be nested, that is, its member interfaces cannot be Eth-Trunk.
  • An Ethernet interface can be added to only one Eth-trunk interface. To add the Ethernet interface to another Eth-trunk, delete the Ethernet interface from the current Eth-Trunk first.
  • The member interfaces of an Eth-trunk must be of the same type, For example, the FE interface and the GE interface cannot be added to the same Eth-trunk.
  • Ethernet interfaces on different LPUs can be added to the same Eth-Trunk.
  • The peer interface directly connected to the Eth-Trunk on the local end must also be added to an Eth-Trunk; otherwise, the two ends cannot communicate.
  • When the rates of member interfaces are different, the interfaces with a smaller rate may be congested, and thus packets may be lost.
  • After an interface is added to an Eth-Trunk, MAC address learning is performed by the Eth-Trunk rather than the member interfaces.

    that means the ports which will be include in the Eth-trunk should keep the config default.


 Read Product Manual before commision.