华为交换机配置问题，菜鸟请教。

华为s3026交换机配置：
<Quidway>system
Enter system view, return to user view with Ctrl+Z.
[Quidway]vlan 2
[Quidway-vlan2]port e0/2
[Quidway-vlan2]vlan 3
[Quidway-vlan3]port e0/7
[Quidway-vlan3]int vlan 2
[Quidway-Vlan-interface2]quit
[Quidway]int e0/1
[Quidway-Ethernet0/1]port link-type trunk
[Quidway-Ethernet0/1]port trunk permit vlan all
[Quidway-Ethernet0/1]port trunk encap dot1q
[Quidway]save
Save current configuration to flash memory successfully.
[Quidway]

[Quidway-vlan3]int vlan 2
[Quidway-Vlan-interface2]quit
这两句是什么意思？