One of them (error port) not connected to anywhere, the other connected to to the computer via patch panel. Nope, the connection is good.
Here is the configuration :
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime
no service password-encryption
service sequence-numbers
!
hostname GMSI-SW01
!
enable secret xxx
!
no aaa new-model
clock timezone UTC 8
switch 1 provision ws-c3750g-24ts
ip subnet-zero
ip routing
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface GigabitEthernet1/0/1
description management interface
!
interface GigabitEthernet1/0/2
description server interface
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet1/0/3
description server interface
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet1/0/4
description server interface
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet1/0/5
description server interface
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet1/0/6
description server interface
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet1/0/7
description server interface
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet1/0/8
description server interface
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet1/0/9
description development
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/0/10
description development
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/0/11
description development
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/0/12
description development
switchport access vlan 6
switchport mode access
!
interface GigabitEthernet1/0/13
description data_lt3
switchport access vlan 3
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/14
description data_lt3
switchport access vlan 3
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/15
description data_lt2
switchport access vlan 4
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/16
description data_lt2
switchport access vlan 4
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/17
description data_lt1
switchport access vlan 5
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/18
description data_lt1
switchport access vlan 5
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/19
description data_lt1
switchport access vlan 5
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/20
description data_lt1
switchport access vlan 5
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet1/0/21
!
interface GigabitEthernet1/0/22
!
interface GigabitEthernet1/0/23
!
interface GigabitEthernet1/0/24
!
interface GigabitEthernet1/0/25
!
interface GigabitEthernet1/0/26
!
interface GigabitEthernet1/0/27
!
interface GigabitEthernet1/0/28
!
