1、AS1中存在两个环回一个地址为192.168.1.0/24该地址不能在任何协议中宣告;AS3中存在两个环回一个地址为192.168.2.0/24该地址不能在任何协议中宣告最终要求这两个环回可以ping通;2、整个AS2的IP地址为172.16.0.0/16请合理划分;并且其内部配置OSPF协议3、R1-R8的建邻环回用x.x.x.X/32表示;R3-R7上再划分一个业务网断4、AS间的骨干链路IP地址随意定制;5、使用BGP协议让整个网络所有设备的环回可以互相访问;6、减少路由条目数量避免环路出现;1配置ip[r1-GigabitEthernet0/0/0]ip ad 12.1.1.1 24[r1-LoopBack0]ip ad 1.1.1.1 32[r1-LoopBack1]ip ad 192.168.1.1 24[r2-GigabitEthernet0/0/0]ip ad 12.1.1.2 24[r2-GigabitEthernet0/0/1]ip ad 172.16.1.1 30[r2-GigabitEthernet0/0/2]ip ad 172.16.1.9 30[r2-LoopBack0]ip ad 2.2.2.2 32[r3-GigabitEthernet0/0/0]ip ad 172.16.1.2 30[r3-GigabitEthernet0/0/1]ip ad 172.16.1.5 30[r3-LoopBack0]ip ad 3.3.3.3 32[r3-LoopBack1]ip ad 172.16.3.3 24[r4-GigabitEthernet0/0/0]ip ad 172.16.1.6 30[r4-GigabitEthernet0/0/1]ip ad 172.16.1.13 30[r4-LoopBack0]ip ad 4.4.4.4 32[r4-LoopBack1]ip ad 172.16.4.4 24[r5-GigabitEthernet0/0/0]ip ad 172.16.1.10 30[r5-GigabitEthernet0/0/1]ip ad 172.16.1.17 30[r5-LoopBack0]ip ad 5.5.5.5 32[r5-LoopBack1]ip ad 172.16.5.5 24[r6-GigabitEthernet0/0/0]ip ad 172.16.1.18 30[r6-GigabitEthernet0/0/1]ip ad 172.16.1.21 30[r6-LoopBack0]ip ad 6.6.6.6 32[r6-LoopBack1]ip ad 172.16.6.6 24[r7-GigabitEthernet0/0/0]ip ad 172.16.1.22 30[r7-GigabitEthernet0/0/1]ip ad 172.16.1.14 30[r7-GigabitEthernet0/0/2]ip ad 34.1.1.7 24[r7-LoopBack0]ip ad 7.7.7.7 32[r7-LoopBack1]ip ad 172.16.7.7 24[r8-GigabitEthernet0/0/0]ip ad 34.1.1.8 24[r8-LoopBack0]ip ad 8.8.8.8 32[r8-LoopBack1]ip ad 192.168.2.8 24二全网通[r2-ospf-1-area-0.0.0.0]net 172.16.1.0 0.0.0.255[r2-ospf-1-area-0.0.0.0]net 2.2.2.2 0.0.0.0[r3-ospf-1-area-0.0.0.0]net 172.16.1.0 0.0.0.255[r3-ospf-1-area-0.0.0.0]net 3.3.3.3 0.0.0.0[r3-ospf-1-area-0.0.0.0]net 172.16.3.0 0.0.0.255[r4-ospf-1-area-0.0.0.0]net 172.16.1.0 0.0.0.255[r4-ospf-1-area-0.0.0.0]net 4.4.4.4 0.0.0.0[r4-ospf-1-area-0.0.0.0]net 172.16.4.0 0.0.0.255[r5-ospf-1-area-0.0.0.0]net 172.16.1.0 0.0.0.255[r5-ospf-1-area-0.0.0.0]net 172.16.5.0 0.0.0.255[r5-ospf-1-area-0.0.0.0]net 5.5.5.5 0.0.0.0[r6-ospf-1-area-0.0.0.0]net 172.16.1.0 0.0.0.255[r6-ospf-1-area-0.0.0.0]net 172.16.6.0 0.0.0.255[r6-ospf-1-area-0.0.0.0]net 6.6.6.6 0.0.0.0[r7-ospf-1-area-0.0.0.0]net 172.16.1.0 0.0.0.255[r7-ospf-1-area-0.0.0.0]net 172.16.7.0 0.0.0.255[r7-ospf-1-area-0.0.0.0]net 7.7.7.7 0.0.0.0[r1-bgp]peer 12.1.1.2 as 2[r2]bgp 64512[r2-bgp]confederation id 2[r2-bgp]confederation peer-as 64513[r2-bgp]peer 12.1.1.1 as 1[r2-bgp]peer 3.3.3.3 as 64512[r2-bgp]peer 3.3.3.3 connect-interface l0[r2-bgp]peer 3.3.3.3 next-hop-local[r2-bgp]peer 172.16.1.10 as 64513[r2-bgp]peer 172.16.1.10 next-hop-local[r3-bgp]confederation id 2[r3-bgp]confederation peer-as 64513[r3-bgp]peer 2.2.2.2 as 64512[r3-bgp]peer 2.2.2.2 connect-interface l0[r3-bgp]peer 2.2.2.2 next-hop-local[r3-bgp]peer 4.4.4.4 as 64512[r3-bgp]peer 4.4.4.4 connect-interface l0[r3-bgp]peer 4.4.4.4 next-hop-local[r4-bgp]confederation id 2[r4-bgp]confederation peer-as 64513[r4-bgp]peer 3.3.3.3 as 64512[r4-bgp]peer 3.3.3.3 connect-interface l0[r4-bgp]peer 3.3.3.3 next-hop-local[r5]bgp 64513[r5-bgp]confederation id 2[r5-bgp]confederation peer-as 64512[r5-bgp]peer 172.16.1.9 as 64512[r5-bgp]peer 172.16.1.9 next-hop-local[r5-bgp]peer 6.6.6.6 as 64513[r5-bgp]peer 6.6.6.6 connect-interface l0[r5-bgp]peer 6.6.6.6 next-hop-local[r6-bgp]confederation id 2[r6-bgp]confederation peer-as 64512[r6-bgp]peer 5.5.5.5 as 64513[r6-bgp]peer 5.5.5.5 connect-interface l0[r6-bgp]peer 5.5.5.5 next-hop-local[r6-bgp]peer 7.7.7.7 as 64513[r6-bgp]peer 7.7.7.7 connect-interface l0[r6-bgp]peer 7.7.7.7 next-hop-local[r7-bgp]confederation id 2[r7-bgp]confederation peer-as 64512[r7-bgp]peer 6.6.6.6 as 64513[r7-bgp]peer 6.6.6.6 connect-interface l0[r7-bgp]peer 6.6.6.6 next-hop-local[r7-bgp]peer 34.1.1.8as 3[r8-bgp]peer 34.1.1.7 as 2[r3-bgp]peer 2.2.2.2 reflect-client[r3-bgp]peer 4.4.4.4 reflect-client[r3-bgp]net 172.16.3.0 24[r4-bgp]net 172.16.4.0 24[r5-bgp]net 172.16.5.0 24[r6-bgp]net 172.16.6.0 24[r7-bgp]net 172.16.7.0 24三汇总网段[r2-bgp]aggregate 172.16.0.0 21 detail-suppressed as-set[r7-bgp]aggregate 172.16.0.0 21 detail-suppressed as-set四引入直连并做路由策略过滤[r1-acl-basic-2000]rule permit source 192.168.1.0 0.0.0.255[r1-route-policy]if-match acl 2000[r1-bgp]import-route direct route-policy aa[r8-acl-basic-2000]rule permit source 192.168.2.0 0.0.0.255[r8-route-policy]if-match acl 2000[r8-bgp]import-route direct route-policy aa