求助：华为ENSP，单臂路由+DHCP无法实现

zhangjindcyy

拓扑

如图，左侧是一个最基本的单臂路由实验
PC1处于VLAN10，网关192.168.10.1，手动配置IP地址，可以PING通VLAN10和VLAN20的网关
PC2处于VLAN20，网关192.168.20.1，无法自动获取IP地址！！！（这是遇到的问题）
发现问题以后，我又添加了一个PC3，想试试R1的DHCP功能是否正常，结果可以获得IP地址，DHCP是正常的
用wireshark抓R1  E0/0/0口的数据包，发现路由器R1能收到DHCP DISCOVER包，但却没有回应

这是ENSP软件的BUG吗？单臂路由可以单独实现，DHCP也可以单独实现，但是两者结合到一块儿就不适用了
路由器的配置文件
<router>di cu
#
sysname router
#
dhcp enable
#
ip pool vlan20
gateway-list 192.168.20.1
network 192.168.20.0 mask 255.255.255.0
excluded-ip-address 192.168.20.2 192.168.20.3
dns-list 8.8.8.8
#
ip pool vlan2
gateway-list 192.168.2.1
network 192.168.2.0 mask 255.255.255.0
dns-list 7.7.7.7
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher OOCM4m($F4ajUn1vMEIBNUw#
local-user admin service-type http
#
firewall zone Local
priority 16
#
interface Ethernet0/0/0
dhcp select global
#
interface Ethernet0/0/0.10
vlan-type dot1q 10
ip address 192.168.10.1 255.255.255.0
#
interface Ethernet0/0/0.20
vlan-type dot1q 20
ip address 192.168.20.1 255.255.255.0
dhcp select global
#
interface Ethernet0/0/1
ip address 192.168.2.1 255.255.255.0
dhcp select global
#
interface Serial0/0/0
link-protocol ppp
#
interface Serial0/0/1
link-protocol ppp
#
interface Serial0/0/2
link-protocol ppp
#
interface Serial0/0/3
link-protocol ppp
#
interface GigabitEthernet0/0/0
#
interface GigabitEthernet0/0/1
#
interface GigabitEthernet0/0/2
#
interface GigabitEthernet0/0/3
#
wlan
#
interface NULL0
#
user-interface con 0
user-interface vty 0 4
user-interface vty 16 20
#
return
<router>
交换机的配置文件
<sw>di cu
#
sysname sw
#
vlan batch 10 20
#
cluster enable
ntdp enable
ndp enable
#
drop illegal-mac alarm
#
dhcp enable
#
diffserv domain default
#
drop-profile default
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password simple admin
local-user admin service-type http
#
interface Vlanif1
#
interface Vlanif20
dhcp select relay
dhcp relay server-ip 192.168.20.1
#
interface MEth0/0/1
#
interface Ethernet0/0/1
port link-type trunk
port trunk allow-pass vlan 2 to 4094
#
interface Ethernet0/0/2
#
interface Ethernet0/0/3
#
interface Ethernet0/0/4
#
interface Ethernet0/0/5
#
interface Ethernet0/0/6
#
interface Ethernet0/0/7
#
interface Ethernet0/0/8
#
interface Ethernet0/0/9
#
interface Ethernet0/0/10
port link-type access
port default vlan 10
#
interface Ethernet0/0/11
#
interface Ethernet0/0/12
#
interface Ethernet0/0/13
#
interface Ethernet0/0/14
#
interface Ethernet0/0/15
#
interface Ethernet0/0/16
#
interface Ethernet0/0/17
#
interface Ethernet0/0/18
#
interface Ethernet0/0/19
#
interface Ethernet0/0/20
port link-type access
port default vlan 20
#
interface Ethernet0/0/21
#
interface Ethernet0/0/22
#
interface GigabitEthernet0/0/1
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
user-interface con 0
user-interface vty 0 4
#
return
<sw>

313623722

亲，，单臂路由 ，你的路由内  我咋没看到内，话说路由器多少做个NAT吧

wy76519

把交换的trunk口改为Hybrid方式并且标记需要通过的VLAN，属于VLAN 20的端口也不要使用ACCESS方式使用华为默认的Hybrid非标记模式，在看看还有没有什么问题。还有既然是单臂路由，那么交换机和路由器的子接口属于一个二层范围，不需要再交换的VLAN 20下启用DHCP 中继。

self2012

拿分走人呵呵，楼下继续！