bgp
分别按照图中的表示配置好IP地址
R1
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]un in en
Info: Information center is disabled.
[Huawei]int g0/0/0
[Huawei-GigabitEthernet0/0/0]ip add 192.168.3.2 24
[Huawei-GigabitEthernet0/0/0]un sh
Info: Interface GigabitEthernet0/0/0 is not shutdown.
[Huawei-GigabitEthernet0/0/0]q
[Huawei]int g0/0/1
[Huawei-GigabitEthernet0/0/1]ip add 192.168.2.2 24
[Huawei-GigabitEthernet0/0/1]un sh
Info: Interface GigabitEthernet0/0/1 is not shutdown.
[Huawei-GigabitEthernet0/0/1]q
[Huawei]bgp 65009
[Huawei-bgp]router-id 1.1.1.1 设置标识
在需要学习对过的区域内容是才需要写对过的IP
[Huawei-bgp]peer 192.168.3.1 as-number 65009
[Huawei-bgp]peer 192.168.4.2 as-number 65009
r2
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]int g0/0/1
[Huawei-GigabitEthernet0/0/1]ip add 192.168.1.1 24
May 22 2021 09:42:24-08:00 Huawei %%01IFNET/4/LINK_STATE(l)[0]:The line protocol
IP on the interface GigabitEthernet0/0/1 has entered the UP state.
[Huawei-GigabitEthernet0/0/1]un sh
Info: Interface GigabitEthernet0/0/1 is not shutdown.
[Huawei-GigabitEthernet0/0/1]q
[Huawei]un in en
Info: Information center is disabled.
[Huawei]int g0/0/0
[Huawei-GigabitEthernet0/0/0]ip add 192.168.2.1 24
[Huawei-GigabitEthernet0/0/0]un sh
Info: Interface GigabitEthernet0/0/0 is not shutdown.
[Huawei-GigabitEthernet0/0/0]q
[Huawei]bgp 65009
[Huawei-bgp]peer 192.168.2.2 as-number 65009
[Huawei-bgp]peer 192.168.1.2 as-number 65009
[Huawei-bgp]router-id 2.2.2.2
[Huawei-bgp]q
r3
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]un in en
Info: Information center is disabled.
[Huawei]int g0/0/1
[Huawei-GigabitEthernet0/0/1]ip add 192.168.1.2 24
[Huawei-GigabitEthernet0/0/1]un sh
Info: Interface GigabitEthernet0/0/1 is not shutdown.
[Huawei-GigabitEthernet0/0/1]q
[Huawei]int g0/0/0
[Huawei-GigabitEthernet0/0/0]ip add 192.168.3.1 24
[Huawei-GigabitEthernet0/0/0]un sh
Info: Interface GigabitEthernet0/0/0 is not shutdown.
[Huawei-GigabitEthernet0/0/0]q
[Huawei]bgp 65009
[Huawei-bgp]router-id 3.3.3.3
[Huawei-bgp]peer 192.168.1.1 as-number 65009
[Huawei-bgp]peer 192.168.3.2 as-number 65009
R4
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]un in en
Info: Information center is disabled.
[Huawei]int g0/0/0
[Huawei-GigabitEthernet0/0/0]ip add 192.168.4.2 24
[Huawei-GigabitEthernet0/0/0]un sh
Info: Interface GigabitEthernet0/0/0 is not shutdown.
[Huawei-GigabitEthernet0/0/0]q
[Huawei]int g0/0/1
[Huawei-GigabitEthernet0/0/1]ip add 192.168.5.1 24
[Huawei-GigabitEthernet0/0/1]un sh
Info: Interface GigabitEthernet0/0/1 is not shutdown.
[Huawei-GigabitEthernet0/0/1]q
[Huawei]bgp 65008
[Huawei-bgp]router-id 4.4.4.4
[Huawei-bgp]peer 192.168.4.1 as-number 65009 这里要写对过的标识号
[Huawei-bgp]ipv4-family unicast 设置单播类似于之前的重分发
[Huawei-bgp-af-ipv4]network 192.168.5.0 255.255.255.0
[Huawei-bgp-af-ipv4]q
[Huawei-bgp]q
[Huawei]dis bgp routing-table
在我们输入之前[Huawei-bgp]ipv4-family unicast
[Huawei-bgp-af-ipv4]network 192.168.5.0 255.255.255.0
我们查看dis bgp routing-table此命令的时候可以看到r3和r2的路由器上面5.0网段是属于i的是无效的路由条目，而*号是属于有效的在我们输入[Huawei-bgp]ipv4-family unicast
[Huawei-bgp-af-ipv4]network 192.168.5.0 255.255.255.0
此命令后再查看就会发现5.0网段的路由条目变成*号
ospf和bgp的重分发
配置好IP地址
照图上配置然后再ospf里面重分发bgp再bgp里面重分发ospf bgp2实现单播即可ar14的单播命令[Huawei-bgp]ipv4-family un
[Huawei-bgp]ipv4-family unicast
[Huawei-bgp-af-ipv4]net 192.168.4.0 255.255.255.0
ar13的重分发命令
[Huawei]bgp 1
[Huawei-bgp]router-id 3.3.3.3
[Huawei-bgp]peer 192.168.3.2 as-number 2
[Huawei-bgp]import-route ospf 1
[Huawei-bgp]q
[Huawei]ospf router-id 2.2.2.2
[Huawei-ospf-1]import-route bgp cost 10