S5500-28C-EI交换机端口自动shutdown

设备配置如下：
 #
 version 5.20, Release 2220P02
#
 sysname JKS_5500
#   
 irf mac-address persistent timer
 irf auto-update enable
 undo irf link-delay
#
 domain default enable system
#
 telnet server enable
#
 management-vlan 200
#
 password-recovery enable
#
vlan 1
#
vlan 9 to 10
#
vlan 20 to 21
#
 vlan 30
 #
 vlan 50
 description 生产数据采集
#
 vlan 100
#
 vlan 200
#
 domain system
 access-limit disable
 state active
 idle-cut disable
 self-service-url disable
#
 user-group system
 group-attribute allow-guest
#
local-user admin
 password cipher $c$3$quip0qmUR1yXxRAgvz9mXVElpIZvn+iKSnM=
 authorization-attribute level 3
 service-type ssh telnet terminal
 service-type web
#
 interface NULL0
#
 interface Vlan-interface1
 ip address dhcp-alloc client-identifier mac Vlan-interface1
#
interface Vlan-interface200
 ip address 192.168.200.22 255.255.255.0
#
 interface GigabitEthernet1/0/1
 port link-mode bridge
 port access vlan 30
#
interface GigabitEthernet1/0/2
 port link-mode bridge
 port access vlan 20
#
 interface GigabitEthernet1/0/3
 port link-mode bridge
 port access vlan 30
#
··········
# interface GigabitEthernet1/0/21
 port link-mode bridge
 port access vlan 50
 stp disable
#
 interface GigabitEthernet1/0/22
 port link-mode bridge
 port access vlan 50
 shutdown
#
 interface GigabitEthernet1/0/23
 port link-mode bridge
 port access vlan 50
#
interface GigabitEthernet1/0/24
 port link-mode bridge
 shutdown
#
 interface GigabitEthernet1/0/25
 port link-mode bridge
 port link-type trunk
 port trunk permit vlan all
#
 interface GigabitEthernet1/0/26
 port link-mode bridge
 port link-type trunk
 port trunk permit vlan all
#
 interface GigabitEthernet1/0/27
 port link-mode bridge
 description 连接锅炉0米
 port link-type trunk
 port trunk permit vlan all
 shutdown
#
 interface GigabitEthernet1/0/28
 port link-mode bridge
 description 连接#4带
 port link-type trunk
 port trunk permit vlan all
 shutdown
#
 ip route-static 0.0.0.0 0.0.0.0 192.168.200.251
#
 snmp-agent
 snmp-agent local-engineid 800063A2000FE2C385E26877
 snmp-agent community read njaa 
 snmp-agent community write njaarw
 snmp-agent sys-info version all
#
 ntp-service unicast-server 10.10.80.10
#
 ssh server enable
#
 load xml-configuration
#
 load tr069-configuration
#
 user-interface aux 0
user-interface vty 0 4
 authentication-mode scheme
user-interface vty 5 15
#
 return