华为QUIDWAY系列路由器的单臂路由配置案例

作者:邓聪聪　　

单臂路由

    单臂路由（router-on-a-stick）是指在路由器的一个接口上通过配置子接口（或“逻辑接口”，并不存在真正物理接口）的方式，实现原来相互隔离的不同VLAN（虚拟局域网）之间的互联互通。  

单臂路由的子接口编辑
    路由器的物理接口可以被划分为成多个逻辑接口，这些被划分后的逻辑接口被形象的称为子接口。值得注意的是这些逻辑子接口不能被单独的开启或关闭，也就是说，当物理接口被开启或关闭时，所有的该接口的子接口也随之被开启或关闭。

优缺点
    VLAN能有效分割局域网，实现各网络区域之间的访问控制。但现实中，往往需要配置某些VLAN之间的互联互通。比如，你的公司划分为领导层、销售部、财务部、人力部、科技部、审计部，并为不同部门配置了不同的VLAN，部门之间不能相互访问，有效保证了各部门的信息安全。但经常出现领导层需要跨越VLAN访问其他各个部门，这个功能就由单臂路由来实现。
优点：实现不同vlan之间的通信，有助理解、学习VLAN原理和子接口概念。
缺点：容易成为网络单点故障，配置稍有复杂，现实意义不大。

配置实例

核心出口路由器配置信息；

<Huawei>dis cu 
[V200R003C00]
#
 snmp-agent local-engineid 800007DB03000000000000
 snmp-agent 
#
 clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
 drop illegal-mac alarm
#
 set cpu-usage threshold 80 restore 75
#
aaa 
 authentication-scheme default
 authorization-scheme default
 accounting-scheme default
 domain default 
 domain default_admin 
 local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
 local-user admin service-type http
#
firewall zone Local
 priority 15
#
interface GigabitEthernet0/0/0
#
interface GigabitEthernet0/0/0.1
 dot1q termination vid 10
 ip address 10.1.1.1 255.255.255.252 
 arp broadcast enable
#
interface GigabitEthernet0/0/0.3
 dot1q termination vid 20
 ip address 20.1.1.1 255.255.255.0 
 arp broadcast enable
#
interface GigabitEthernet0/0/1
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
user-interface con 0
 authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
<Huawei>

sw1的配置；

<Huawei>dis cu 
#
sysname Huawei
#
vlan batch 10 20
#
cluster enable
ntdp enable
ndp enable
#
drop illegal-mac alarm
#
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 MEth0/0/1
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 10 20
#
interface GigabitEthernet0/0/2
 port link-type access
 port default vlan 10
#
interface GigabitEthernet0/0/3
 port link-type access
 port default vlan 20
#
interface GigabitEthernet0/0/4
#
interface GigabitEthernet0/0/5
#
interface GigabitEthernet0/0/6
#
interface GigabitEthernet0/0/7
#
interface GigabitEthernet0/0/8
#
interface GigabitEthernet0/0/9
#
interface GigabitEthernet0/0/10
#
interface GigabitEthernet0/0/11
#
interface GigabitEthernet0/0/12
#
interface GigabitEthernet0/0/13
#
interface GigabitEthernet0/0/14
#
interface GigabitEthernet0/0/15
#
interface GigabitEthernet0/0/16
#
interface GigabitEthernet0/0/17
#
interface GigabitEthernet0/0/18
#
interface GigabitEthernet0/0/19
#
interface GigabitEthernet0/0/20
#
interface GigabitEthernet0/0/21
#
interface GigabitEthernet0/0/22
#
interface GigabitEthernet0/0/23
#
interface GigabitEthernet0/0/24
#
interface NULL0
#
user-interface con 0
user-interface vty 0 4
#
return
<Huawei> 

PC端配置；

PC>ipconfig

Link local IPv6 address...........: fe80::5689:98ff:fef4:292c
IPv6 address......................: :: / 128
IPv6 gateway......................: ::
IPv4 address......................: 10.1.1.2
Subnet mask.......................: 255.255.255.252
Gateway...........................: 10.1.1.1
Physical address..................: 54-89-98-F4-29-2C
DNS server........................:

PC>ping 10.1.1.2

Ping 10.1.1.2: 32 data bytes, Press Ctrl_C to break
From 10.1.1.2: bytes=32 seq=1 ttl=128 time<1 ms

--- 10.1.1.2 ping statistics ---
  1 packet(s) transmitted
  1 packet(s) received
  0.00% packet loss
  round-trip min/avg/max = 0/0/0 ms

PC>