测试环境

（ens36）虚拟机A（ens33）<—（对等网络：10.10.10.0/30）—>（ens33）虚拟机B（ens36）

| |

内网 192.168.1.0/24 内网 172.17.1.0/24

安装Quagga

yum install quagga

在CentOS7，SELinux默认会阻止quagga将配置文件写到/usr/sbin/zebra，需要禁用此策略。如果使用的是CentOS 6的则跳过此步骤。

setsebool -P zebra_write_config 1

配置Zebra

首先创建Zebra配置文件，并启用Zebra守护进程

cp /usr/share/doc/quagga-0.99.22.4/zebra.conf.sample /etc/quagga/zebra.conf
service zebra start
chkconfig zebra on

进入vtysh命令行，配置日志存储文件

[root@192 ~]# vtysh 
Hello, this is Quagga (version 0.99.22.4).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
192.168.247.146# configure terminal
192.168.247.146(config)# log file /var/log/quagga/quagga.log
192.168.247.146(config)# exit
192.168.247.146# write  
Building Configuration...
Configuration saved to /etc/quagga/zebra.conf
[OK]

配置虚拟机A接口参数

192.168.247.146# show interface  
Interface ens33 is up, line protocol detection is disabled
  index 2 metric 1 mtu 1500 
  flags: <UP,BROADCAST,RUNNING,MULTICAST>
  HWaddr: 00:0c:29:c8:63:38
  inet 192.168.247.144/24 broadcast 192.168.247.255
  inet6 fe80::5ad4:63d3:3cf5:591a/64
  inet6 fe80::7637:6430:5b9f:18db/64
Interface ens36 is up, line protocol detection is disabled
  index 3 metric 1 mtu 1500 
  flags: <UP,BROADCAST,RUNNING,MULTICAST>
  HWaddr: 00:0c:29:c8:63:42
  inet 192.168.247.146/24 broadcast 192.168.247.255
  inet6 fe80::d3de:98dd:9c37:c144/64
...
192.168.247.146# conf t
192.168.247.146(config)# interface  ens33
192.168.247.146(config-if)# ip address 10.10.10.1/30
192.168.247.146(config-if)# description to-site-B
192.168.247.146(config-if)# no shutdown 
192.168.247.146(config-if)# interface  ens36
192.168.247.146(config-if)# ip address 192.168.1.1/24
192.168.247.146(config-if)# description to-site-A-LAN
192.168.247.146(config-if)# no shutdown 
192.168.247.146(config-if)# do show interface 
Interface ens33 is up, line protocol detection is disabled
  Description: to-site-B
  index 2 metric 1 mtu 1500 
  flags: <UP,BROADCAST,RUNNING,MULTICAST>
  HWaddr: 00:0c:29:c8:63:38
  inet 10.10.10.1/30 broadcast 10.10.10.3
  inet 192.168.247.144/24 broadcast 192.168.247.255
  inet6 fe80::5ad4:63d3:3cf5:591a/64
  inet6 fe80::7637:6430:5b9f:18db/64
Interface ens36 is up, line protocol detection is disabled
  Description: to-site-A-LAN
  index 3 metric 1 mtu 1500 
  flags: <UP,BROADCAST,RUNNING,MULTICAST>
  HWaddr: 00:0c:29:c8:63:42
  inet 192.168.1.1/24 broadcast 192.168.1.255
  inet 192.168.247.146/24 broadcast 192.168.247.255
  inet6 fe80::d3de:98dd:9c37:c144/64
...

同理，虚拟机B的ens33配置ip address 10.10.10.2/30，ens36配置172.17.1.1/24

配置BGP

cp /usr/share/doc/quagga-0.99.22.4/bgpd.conf.sample /etc/quagga/bgpd.conf
service bgpd start
chkconfig bgpd on

配置邻居

在一些版本，比如当前版本，发现会有一个默认AS号为7675的BGP会话。由于我们不需要这个会话，所以先把它移除，再添加我们的。

虚拟B进入vtysh

192.168.247.147# conf t
192.168.247.147(config)# no router bgp  7675
192.168.247.147(config)# router bgp  200
192.168.247.147(config-router)# no auto-summary  
192.168.247.147(config-router)# no synchronization  
192.168.247.147(config-router)# neighbor 10.10.10.1 remote-as 100
192.168.247.147(config-router)# neighbor 10.10.10.1 description  "provider A"
192.168.247.147(config-router)# exit
192.168.247.147(config)# exit
192.168.247.147# write

查看BGP邻居是否建立

192.168.247.147# show ip bgp summary  
BGP router identifier 10.10.10.2, local AS number 200
RIB entries 0, using 0 bytes of memory
Peers 1, using 4560 bytes of memory

Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
10.10.10.1      4   100       2       3        0    0    0 00:00:53        0

从输出中，我们可以看到"State/PfxRcd"部分。如果对等关闭，输出将会显示"Idle"或者"Active"。"Active"意味着路由器正在积极地寻找邻居、前缀或者路由。当对等是up状态，"State/PfxRcd"下的输出状态将会从特殊邻居接收到前缀号。在这个例子的输出中，BGP对等只是在AS100和AS200之间呈up状态。因此没有前缀被更改，所以最右边列的数值是0。

配置前缀通告

虚拟机A中执行

192.168.247.146# conf terminal  
192.168.247.146(config)# router bgp 100
192.168.247.146(config-router)# network 192.168.1.0/24
192.168.247.146(config-router)# exit

虚拟机B中执行

192.168.247.147# conf terminal  
192.168.247.147(config)# router bgp 200
192.168.247.147(config-router)# network 172.17.1.0/24
192.168.247.147(config-router)# exit

以虚拟机B为例：

可以看到前缀数量改变

192.168.247.147# show ip bgp summary 
BGP router identifier 10.10.10.2, local AS number 200
RIB entries 3, using 336 bytes of memory
Peers 1, using 4560 bytes of memory

Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
10.10.10.1      4   100      40      41        0    0    0 00:37:55        1

Total number of neighbors 1

回到虚拟机B，可以一下命令查看邻居收到的前缀总数

192.168.247.147# show ip bgp neighbors 10.10.10.1 advertised-routes 
BGP table version is 0, local router ID is 10.10.10.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 172.17.1.0/24    10.10.10.2               0         32768 i

Total number of prefixes 1

查看哪些前缀是从邻居10.10.10.1收到的

192.168.247.147# show ip bgp neighbors 10.10.10.1 routes 
BGP table version is 0, local router ID is 10.10.10.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 192.168.1.0      10.10.10.1               0             0 100 i

Total number of prefixes 1

查看所有的BGP路由器

192.168.247.147# show ip bgp 
BGP table version is 0, local router ID is 10.10.10.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 172.17.1.0/24    0.0.0.0                  0         32768 i
*> 192.168.1.0      10.10.10.1               0             0 100 i

Total number of prefixes 2

其他命令如查看所有路由、只看BGP路由等

192.168.247.147# show ip route 
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, A - Babel,
       > - selected route, * - FIB route

K>* 0.0.0.0/0 via 192.168.247.2, ens33
C>* 10.10.10.0/30 is directly connected, ens33
C>* 127.0.0.0/8 is directly connected, lo
C>* 172.17.1.0/24 is directly connected, ens36
B>* 192.168.1.0/24 [20/0] via 10.10.10.1, ens33, 00:05:29
C>* 192.168.122.0/24 is directly connected, virbr0
C * 192.168.247.0/24 is directly connected, ens36
C>* 192.168.247.0/24 is directly connected, ens33
192.168.247.147# show ip route bgp 
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, A - Babel,
       > - selected route, * - FIB route

B>* 192.168.1.0/24 [20/0] via 10.10.10.1, ens33, 00:05:33

测试环境

（ens36）虚拟机A（ens33）<—（对等网络：10.10.10.0/30）—>（ens33）虚拟机B（ens36）

| |

内网 192.168.1.0/24 内网 172.17.1.0/24

安装Quagga

yum install quagga

在CentOS7，SELinux默认会阻止quagga将配置文件写到/usr/sbin/zebra，需要禁用此策略。如果使用的是CentOS 6的则跳过此步骤。

setsebool -P zebra_write_config 1

配置Zebra

首先创建Zebra配置文件，并启用Zebra守护进程

cp /usr/share/doc/quagga-0.99.22.4/zebra.conf.sample /etc/quagga/zebra.conf
service zebra start
chkconfig zebra on

进入vtysh命令行，配置日志存储文件

[root@192 ~]# vtysh 
Hello, this is Quagga (version 0.99.22.4).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
192.168.247.146# configure terminal
192.168.247.146(config)# log file /var/log/quagga/quagga.log
192.168.247.146(config)# exit
192.168.247.146# write  
Building Configuration...
Configuration saved to /etc/quagga/zebra.conf
[OK]

配置虚拟机A接口参数

192.168.247.146# show interface  
Interface ens33 is up, line protocol detection is disabled
  index 2 metric 1 mtu 1500 
  flags: <UP,BROADCAST,RUNNING,MULTICAST>
  HWaddr: 00:0c:29:c8:63:38
  inet 192.168.247.144/24 broadcast 192.168.247.255
  inet6 fe80::5ad4:63d3:3cf5:591a/64
  inet6 fe80::7637:6430:5b9f:18db/64
Interface ens36 is up, line protocol detection is disabled
  index 3 metric 1 mtu 1500 
  flags: <UP,BROADCAST,RUNNING,MULTICAST>
  HWaddr: 00:0c:29:c8:63:42
  inet 192.168.247.146/24 broadcast 192.168.247.255
  inet6 fe80::d3de:98dd:9c37:c144/64
...
192.168.247.146# conf t
192.168.247.146(config)# interface  ens33
192.168.247.146(config-if)# ip address 10.10.10.1/30
192.168.247.146(config-if)# description to-site-B
192.168.247.146(config-if)# no shutdown 
192.168.247.146(config-if)# interface  ens36
192.168.247.146(config-if)# ip address 192.168.1.1/24
192.168.247.146(config-if)# description to-site-A-LAN
192.168.247.146(config-if)# no shutdown 
192.168.247.146(config-if)# do show interface 
Interface ens33 is up, line protocol detection is disabled
  Description: to-site-B
  index 2 metric 1 mtu 1500 
  flags: <UP,BROADCAST,RUNNING,MULTICAST>
  HWaddr: 00:0c:29:c8:63:38
  inet 10.10.10.1/30 broadcast 10.10.10.3
  inet 192.168.247.144/24 broadcast 192.168.247.255
  inet6 fe80::5ad4:63d3:3cf5:591a/64
  inet6 fe80::7637:6430:5b9f:18db/64
Interface ens36 is up, line protocol detection is disabled
  Description: to-site-A-LAN
  index 3 metric 1 mtu 1500 
  flags: <UP,BROADCAST,RUNNING,MULTICAST>
  HWaddr: 00:0c:29:c8:63:42
  inet 192.168.1.1/24 broadcast 192.168.1.255
  inet 192.168.247.146/24 broadcast 192.168.247.255
  inet6 fe80::d3de:98dd:9c37:c144/64
...

同理，虚拟机B的ens33配置ip address 10.10.10.2/30，ens36配置172.17.1.1/24

配置BGP

cp /usr/share/doc/quagga-0.99.22.4/bgpd.conf.sample /etc/quagga/bgpd.conf
service bgpd start
chkconfig bgpd on

配置邻居

在一些版本，比如当前版本，发现会有一个默认AS号为7675的BGP会话。由于我们不需要这个会话，所以先把它移除，再添加我们的。

虚拟B进入vtysh

192.168.247.147# conf t
192.168.247.147(config)# no router bgp  7675
192.168.247.147(config)# router bgp  200
192.168.247.147(config-router)# no auto-summary  
192.168.247.147(config-router)# no synchronization  
192.168.247.147(config-router)# neighbor 10.10.10.1 remote-as 100
192.168.247.147(config-router)# neighbor 10.10.10.1 description  "provider A"
192.168.247.147(config-router)# exit
192.168.247.147(config)# exit
192.168.247.147# write

查看BGP邻居是否建立

192.168.247.147# show ip bgp summary  
BGP router identifier 10.10.10.2, local AS number 200
RIB entries 0, using 0 bytes of memory
Peers 1, using 4560 bytes of memory

Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
10.10.10.1      4   100       2       3        0    0    0 00:00:53        0

配置前缀通告

虚拟机A中执行

192.168.247.146# conf terminal  
192.168.247.146(config)# router bgp 100
192.168.247.146(config-router)# network 192.168.1.0/24
192.168.247.146(config-router)# exit

虚拟机B中执行

192.168.247.147# conf terminal  
192.168.247.147(config)# router bgp 200
192.168.247.147(config-router)# network 172.17.1.0/24
192.168.247.147(config-router)# exit

以虚拟机B为例：

可以看到前缀数量改变

192.168.247.147# show ip bgp summary 
BGP router identifier 10.10.10.2, local AS number 200
RIB entries 3, using 336 bytes of memory
Peers 1, using 4560 bytes of memory

Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
10.10.10.1      4   100      40      41        0    0    0 00:37:55        1

Total number of neighbors 1

回到虚拟机B，可以一下命令查看邻居收到的前缀总数

192.168.247.147# show ip bgp neighbors 10.10.10.1 advertised-routes 
BGP table version is 0, local router ID is 10.10.10.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 172.17.1.0/24    10.10.10.2               0         32768 i

Total number of prefixes 1

查看哪些前缀是从邻居10.10.10.1收到的

192.168.247.147# show ip bgp neighbors 10.10.10.1 routes 
BGP table version is 0, local router ID is 10.10.10.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 192.168.1.0      10.10.10.1               0             0 100 i

Total number of prefixes 1

查看所有的BGP路由器

192.168.247.147# show ip bgp 
BGP table version is 0, local router ID is 10.10.10.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 172.17.1.0/24    0.0.0.0                  0         32768 i
*> 192.168.1.0      10.10.10.1               0             0 100 i

Total number of prefixes 2

其他命令如查看所有路由、只看BGP路由等

192.168.247.147# show ip route 
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, A - Babel,
       > - selected route, * - FIB route

K>* 0.0.0.0/0 via 192.168.247.2, ens33
C>* 10.10.10.0/30 is directly connected, ens33
C>* 127.0.0.0/8 is directly connected, lo
C>* 172.17.1.0/24 is directly connected, ens36
B>* 192.168.1.0/24 [20/0] via 10.10.10.1, ens33, 00:05:29
C>* 192.168.122.0/24 is directly connected, virbr0
C * 192.168.247.0/24 is directly connected, ens36
C>* 192.168.247.0/24 is directly connected, ens33
192.168.247.147# show ip route bgp 
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, A - Babel,
       > - selected route, * - FIB route

B>* 192.168.1.0/24 [20/0] via 10.10.10.1, ens33, 00:05:33

应用商城

合作伙伴

开发者

支持与服务

了解天翼云

CentOS系统使用Quagga实验BGP

测试环境

安装Quagga

配置Zebra

配置BGP

配置邻居

配置前缀通告

CentOS系统使用Quagga实验BGP

测试环境

安装Quagga

配置Zebra

配置BGP

配置邻居

配置前缀通告

活动

应用商城

合作伙伴

开发者

支持与服务

了解天翼云

CentOS系统使用Quagga实验BGP

测试环境

安装Quagga

配置Zebra

配置BGP

配置邻居

配置前缀通告

CentOS系统使用Quagga实验BGP

测试环境

安装Quagga

配置Zebra

配置BGP

配置邻居

配置前缀通告