备注：vlan10和vlan20为业务vlan，vlan30为设备管理vlan。

S5700-LSW1:
ip pool vlan10
gateway-list 192.168.10.254
network 192.168.10.0 mask 255.255.255.0
dns-list 8.8.8.8 144.144.144.144

ip pool vlan20
gateway-list 192.168.20.254
network 192.168.20.0 mask 255.255.255.0
dns-list 8.8.8.8 114.114.114.114

interface Vlanif10
ip address 192.168.10.254 255.255.255.0
dhcp select global

interface Vlanif20
ip address 192.168.20.254 255.255.255.0
dhcp select global

interface Vlanif30
description Device Manager VLAN
ip address 192.168.30.254 255.255.255.0

interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan 10 20 30

---

s3700-LSW2:
interface Vlanif30
ip address 192.168.30.253 255.255.255.0

interface MEth0/0/1

interface Ethernet0/0/1
port link-type access
port default vlan 10

interface Ethernet0/0/2
port link-type access
port default vlan 20

interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan 10 20 30

interface GigabitEthernet0/0/2

interface NULL0

user-interface con 0
user-interface vty 0 4
authentication-mode aaa

验证结果：DHCP功能正常。PC1 和 PC2能互相ping通，网络互联正常。