交换机里端口下面没有指定类型，会怎么判断？

大家好!interface GigabitEthernet1/0/17至21端口下面没有指定类型，当该接口下接有用户时，会怎么处理数据？

<huiju-12>disp cu
#
 version 5.20, Release 2220P02
#
 sysname huiju-12
#
 irf mac-address persistent timer
 irf auto-update enable
 undo irf link-delay
#
 domain default enable system
#
 telnet server enable
#
 undo ip http enable
#
 password-recovery enable
#
vlan 1
#
vlan 2 to 21
#
vlan 1000
#
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$3$Wu0o9A+z1Qa6aYjrf/tXCudktNcbqX0EQO1azhgrugDdUQ==
 authorization-attribute level 3
 service-type telnet
#
interface NULL0
#
interface Vlan-interface1000
 ip address 172.168.10.13 255.255.255.0
#
interface GigabitEthernet1/0/1
 port access vlan 20
#
interface GigabitEthernet1/0/2
 port access vlan 20
#
interface GigabitEthernet1/0/3
 port access vlan 20
#
interface GigabitEthernet1/0/4
 port access vlan 20
#
interface GigabitEthernet1/0/5
 port access vlan 20
#
interface GigabitEthernet1/0/6
 port access vlan 20
#
interface GigabitEthernet1/0/7
 port access vlan 20
#
interface GigabitEthernet1/0/8
 port access vlan 20
#
interface GigabitEthernet1/0/9
 port access vlan 20
#
interface GigabitEthernet1/0/10
 port access vlan 20
#
interface GigabitEthernet1/0/11
 port access vlan 20
#
interface GigabitEthernet1/0/12
 port access vlan 20
#
interface GigabitEthernet1/0/13
 port access vlan 20
#
interface GigabitEthernet1/0/14
 port access vlan 20
#
interface GigabitEthernet1/0/15
 port access vlan 20
#
interface GigabitEthernet1/0/16
 port access vlan 20
#
interface GigabitEthernet1/0/17
#
interface GigabitEthernet1/0/18
#
interface GigabitEthernet1/0/19
#
interface GigabitEthernet1/0/20
#
interface GigabitEthernet1/0/21
#
interface GigabitEthernet1/0/22
 shutdown
#
interface GigabitEthernet1/0/23
 port link-type trunk
 port trunk permit vlan all
#
interface GigabitEthernet1/0/24
#
interface GigabitEthernet1/0/25
#
interface GigabitEthernet1/0/26
 shutdown
#
interface GigabitEthernet1/0/27
 shutdown
#
interface GigabitEthernet1/0/28
 shutdown
#
 ip route-static 0.0.0.0 0.0.0.0 172.168.10.1
#
 load xml-configuration
#
user-interface aux 0
 authentication-mode scheme
user-interface vty 0 4
 authentication-mode scheme
 user privilege level 3
user-interface vty 5 15
#
return
<huiju-12>