NFV之OpenWRT IN OpenStack的实践

1.OpenWRT网络配置完成



文档上有一行小字：

wan is a unique logical interface name ／／只要把wan替换成wan2就可以了

OpenWRT的网络配置链接如下：

http://wiki.openwrt.org/doc/uci/network

2.确保route -n 的默认网关正确。Ping8.8.8.8成功

3.通过编辑/etc/resolv.conf文件，往里边添加内容

nameserver 202.96.128.86

nameserver 202.96.128.166

nameserver 8.8.8.8

nameserver 8.8.4.4

然后保存退出，前面的是当地DNS，后面的是谷歌公开的DNS。如下图所示



4.更新软件源

root@myOpenWrt:/usr/sbin# opkg update

5.安装quagga主程序

root@myOpenWrt:/usr/sbin# opkg install quagga

6.选择安装quagga常用模块

其中还有watchdog和vtysh两个模块是辅助模块，一般都需要选上。

root@myOpenWrt:/usr/sbin# opkg install quagga-zebra quagga-ripd quagga-ospfd quagga-watchquagga quagga-vtysh

7.完成以上安装过程后，会新产生/etc/quagga目录，其中quagga的配置文件都在其中。

8.启动quagga

root@myOpenWrt:/etc/quagga# /etc/init.d/quagga start

quagga.init: Starting zebra … done.

quagga.init: Starting ripd … done.

quagga.init: Starting watchquagga … done.

可以参看运行后的网路监听端口，分别默认是2601（zebra）和2602（ripd）

root@myOpenWrt:/etc/quagga# netstat -anp

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name

tcp 0 0 0.0.0.0:2601 0.0.0.0:* LISTEN 3131/zebra

tcp 0 0 0.0.0.0:2602 0.0.0.0:* LISTEN 3137/ripd

9.登录管理台进行设置

myOpenWrt>

输入/etc/quagga/ripd.conf第一行设置的密码后就进入到ripd的管理控制台，至此，一台强大的真正的rip路由器就呈现在你面前啦。

简答输入几个命令看看，至此超多命令呢，而且都是和Cisco路由器的命令基本一直，想学CCIE的筒子们有福气啦。

支持RIP路由协议

（1）配置之前，先看看我的Openwrt网卡设置，基本可以看到我的Openwrt网络拓扑：

通过RIP协议实现的主要目标是这三个网段可以互访，最关键是不需要设置静态路由。

root@myOpenWrt:/etc/quagga# ifconfig

br-lan Link encap:Ethernet HWaddr 00:90:4C:C0:04:51

inet addr:10.10.7.1 Bcast:10.10.7.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:43 errors:0 dropped:0 overruns:0 frame:0

TX packets:88 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:10988 (10.7 KiB) TX bytes:10384 (10.1 KiB)

br-wan Link encap:Ethernet HWaddr 00:90:4C:C0:04:51

inet addr:10.10.8.30 Bcast:10.10.8.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:66125 errors:0 dropped:6060 overruns:0 frame:0

TX packets:40913 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:8414640 (8.0 MiB) TX bytes:4575110 (4.3 MiB)

eth0 Link encap:Ethernet HWaddr 00:90:4C:C0:04:51

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:273997 errors:0 dropped:0 overruns:0 frame:0

TX packets:44407 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:82347347 (78.5 MiB) TX bytes:5276107 (5.0 MiB)

Interrupt:4

lo Link encap:Local Loopback

inet addr:127.0.0.1 Mask:255.0.0.0

UP LOOPBACK RUNNING MTU:16436 Metric:1

RX packets:940 errors:0 dropped:0 overruns:0 frame:0

TX packets:940 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:125091 (122.1 KiB) TX bytes:125091 (122.1 KiB)

tap0 Link encap:Ethernet HWaddr D2:34:15:87:F5:38

inet addr:10.10.6.10 Bcast:10.10.6.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:1846 errors:0 dropped:289 overruns:0 frame:0

TX packets:792 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:100

（2）配置命令

myOpenWrt> en

myOpenWrt> enable –进入管理权限

myOpenWrt# config

myOpenWrt# configure ter

myOpenWrt# configure terminal –进入终端设置模式

myOpenWrt(config)# route

route-map router

myOpenWrt(config)# router

rip zebra

myOpenWrt(config)# router rip –指定路由为rip

myOpenWrt(config-router)# ver

myOpenWrt(config-router)# version 2 –指定版本为rip v2

myOpenWrt(config-router)# network br-wan –配置openwrt的网卡1（重要的命令，将你需要互相访问的网卡都逐个设置

myOpenWrt(config-router)# network br-lan –配置openwrt的网卡2

myOpenWrt(config-router)# network tap0 –配置openwrt的网卡3

myOpenWrt(config-router)# exit —回到上一层

myOpenWrt(config)# in

myOpenWrt(config)# interface tap0 —指定需要配置的网卡 我的机器需要配置的是tap0

myOpenWrt(config-if)# ip rip authentication mode md5 —–认证模式为md5

myOpenWrt(config-if)# ip rip authen

myOpenWrt(config-if)# ip rip authentication str

myOpenWrt(config-if)# ip rip authentication string abc –认证字符串为abc

myOpenWrt(config-if)# exit —回到上一层

myOpenWrt(config)# exit —回到上一层

myOpenWrt# write —-！！！将上述配置写入配置文件，重启后一样生效。

Configuration saved to /etc/quagga/ripd.conf

myOpenWrt#

配置后生成的配置文件内容

root@myOpenWrt:/etc/quagga# cat ripd.conf

!

! Zebra configuration saved from vty

! 2013/06/29 22:04:51

!

password zebra

!

interface tap0

ip rip authentication mode md5 auth-length old-ripd

ip rip authentication string abc

!

router rip

version 2

network br-wan

network br-lan

network tap0

!

line vty

!

RIP协议由于没有hello包，比较不直观。但还是可以看到ripd服务已经起来了：

——





11.ospf配置

Configure eth0 parameters:

site-A-RTR# configure terminal
site-A-RTR(config)# interface eth0
site-A-RTR(config-if)# ip address 10.10.10.1/30
site-A-RTR(config-if)# description to-site-B
site-A-RTR(config-if)# no shutdown

Go ahead and configure eth1 parameters:

site-A-RTR(config)# interface eth1
site-A-RTR(config-if)# ip address 192.168.1.1/24
site-A-RTR(config-if)# description to-site-A-LAN
site-A-RTR(config-if)# no shutdown

Now verify configuration:

site-A-RTR(config-if)# do show interface

site-A-RTR(config-if)# do show interface description

Interface Status Protocol Description

eth0 up unknown to-site-B

eth1 up unknown to-site-A-LAN

Save configuration permanently, and quit interface configuration mode.

site-A-RTR(config-if)# do write
site-A-RTR(config-if)# exit
site-A-RTR(config)# exit
site-A-RTR#

Quit vtysh shell to come back to Linux shell.

site-A-RTR# exit

Next, enable IP forwarding so that traffic can be forwarded between eth0 and eth1 interfaces.

Phase 2: Configuring OSPF

Now launch vtysh shell to continue with OSPF configuration:

vtysh

Enter router configuration mode:

site-A-RTR# configure terminal
site-A-RTR(config)# router ospf

Optionally, set the router-id manually:

site-A-RTR(config-router)# router-id 10.10.10.1

Add the networks that will participate in OSPF:

site-A-RTR(config-router)# network 10.10.10.0/30 area 0
site-A-RTR(config-router)# network 192.168.1.0/24 area 0

Save configuration permanently:

site-A-RTR(config-router)# do write

Repeat the similar OSPF configuration on site-B as well:

site-B-RTR(config-router)# network 10.10.10.0/30 area 0
site-B-RTR(config-router)# network 172.16.1.0/24 area 0
site-B-RTR(config-router)# do write

在openstack的Linux bridge qbr上可以监测到hello包：



这个OpenWRT 的优势还是很明显的，大小10多M,只有VyOS的1/20，命令比VyOS更加接近Cisco路由器的命令。