一.网络拓扑图
- ISIS协议的主要功能跑底层架构路由网段：直连、环回地址，属于控制层面
- IBGP协议通过直接宣告的方式，将业务网段发布，属于数据层面
- ISIS中在R1、R5上跑Level-1，R2、R6上跑Level-1-2，R3、R7上跑Level-2
二.配置详解
R1配置
#配置接口地址
sys
sysname R1 //命名
un in en //关闭信息提示
int g0/0/0
ip add 12.0.0.1 30 //设置IP地址
un sh
int g0/0/1
ip add 16.0.0.1 30
un sh
int loo0
ip add 1.1.1.1 32 //设置环回地址
q
#配置isis协议
isis 1
network-entity 49.0001.0010.0100.1001.00 //在isis协议中设置NSAP地址
is-level level-1 //选择level-1
int g0/0/0
isis en //开启isis功能
int g0/0/1
isis en
int loo0
isis en
q
#配置BGP协议
router id 1.1.1.1 //定义路由id
bgp 56001 //进入bgp自治系统
peer 2.2.2.2 as-number 56001
peer 2.2.2.2 connect-interface LoopBack 0 //配置IBGP对等体关系
peer 3.3.3.3 as-number 56001
peer 3.3.3.3 connect-interface LoopBack 0
peer 6.6.6.6 as-number 56001
peer 6.6.6.6 connect-interface LoopBack 0
peer 7.7.7.7 as-number 56001
peer 7.7.7.7 connect-interface LoopBack 0
q
#配置测试地址，且宣告
int loo 1
ip add 11.0.0.1 30
q
bgp 56001
network 11.0.0.0 30
R2配置
sys
sysname R2
un in en
int g0/0/0
ip add 12.0.0.2 30
un sh
int g0/0/1
ip add 23.0.0.1 30
un sh
int g0/0/2
ip add 26.0.0.1 30
un sh
int g0/0/3
ip add 25.0.0.2 30
un sh
int loo 0
ip add 2.2.2.2 32
q
isis 1
network-entity 49.0001.0020.0200.2002.00
is-level level-1-2
int g0/0/0
isis en
int g0/0/1
isis en
int g0/0/2
isis en
int g0/0/3
isis en
int loo0
isis en
q
isis 1
import-route isis level-2 into level-1 //进行路由泄露，让R1得到详细的路由明细
q
router id 2.2.2.2
bgp 56001
peer 1.1.1.1 as-number 56001
peer 1.1.1.1 connect-interface LoopBack 0
peer 3.3.3.3 as-number 56001
peer 3.3.3.3 connect-interface LoopBack 0
peer 5.5.5.5 as-number 56001
peer 5.5.5.5 connect-interface LoopBack 0
peer 6.6.6.6 as-number 56001
peer 6.6.6.6 connect-interface LoopBack 0
#配置路由反射，让R5学习到R1上的路由
bgp 56001
reflector cluster-id 100
peer 1.1.1.1 reflect-client
peer 5.5.5.5 reflect-client
R3配置
sys
sysname R3
un in en
int g0/0/0
ip add 23.0.0.2 30
un sh
int g0/0/1
ip add 34.0.0.1 30
un sh
int g0/0/2
ip add 37.0.0.1 30
un sh
int loo0
ip add 3.3.3.3 32
q
isis 1
network-entity 49.0000.0030.0300.3003.00
is-level level-2
int g0/0/0 //g0/0/1不需要开启isis功能
is en
int g0/0/2
is en
int loo 0
is en
q
router id 3.3.3.3
bgp 56001
peer 1.1.1.1 as-number 56001
peer 1.1.1.1 connect-interface LoopBack 0
peer 2.2.2.2 as-number 56001
peer 2.2.2.2 connect-interface LoopBack 0
peer 5.5.5.5 as-number 56001
peer 5.5.5.5 connect-interface LoopBack 0
peer 7.7.7.7 as-number 56001
peer 7.7.7.7 connect-interface LoopBack 0
q
bgp 56001
reflector cluster-id 200
peer 2.2.2.2 reflect-client
q
ip route-static 4.4.4.4 32 34.0.0.2 //配置到达R4的静态路由
bgp 56001
peer 4.4.4.4 as-number 56002 //建立EBGP对等体关系
peer 4.4.4.4 connect-interface LoopBack 0
peer 4.4.4.4 ebgp-max-hop 2
peer 1.1.1.1 next-hop-local //优化下一跳
import-route static //重分发静态路由
peer 2.2.2.2 next-hop-local
peer 5.5.5.5 next-hop-local
peer 7.7.7.7 next-hop-local
R4配置
sys
sysname R4
un in en
int g0/0/1
ip add 48.0.0.1 30
un sh
int g0/0/0
ip add 34.0.0.2 30
un sh
int loo0
ip add 4.4.4.4 32
q
ip route-static 3.3.3.3 32 34.0.0.1
router id 4.4.4.4
bgp 56002
peer 8.8.8.8 as-number 56002 //与R8建立IBGP对等体关系
peer 8.8.8.8 connect-interface LoopBack 0
peer 3.3.3.3 as-number 56001 //与R3建立EBGP对等体关系
peer 3.3.3.3 connect-interface LoopBack 0
peer 3.3.3.3 ebgp-max-hop 2
int loo 1
ip add 44.0.0.1 30 //设置测试网段
q
bgp 56002 //宣告相关网段
network 44.0.0.0 30
network 4.4.4.4 32
network 34.0.0.0 30
network 48.0.0.0 30
R5配置
sys
sysname R5
un in en
int g0/0/0
ip add 56.0.0.1 30
un sh
int g0/0/1
ip add 25.0.0.1 30
un sh
int loo 0
ip add 5.5.5.5 32
q
isis 1
network-entity 49.0001.0050.0500.5005.00
is-level level-1
int g0/0/0
isis en
int g0/0/1
isis en
int loo0
isis en
q
router id 5.5.5.5
bgp 56001
peer 2.2.2.2 as-number 56001
peer 2.2.2.2 connect-interface LoopBack 0
peer 3.3.3.3 as-number 56001
peer 3.3.3.3 connect-interface LoopBack 0
peer 6.6.6.6 as-number 56001
peer 6.6.6.6 connect-interface LoopBack 0
peer 7.7.7.7 as-number 56001
peer 7.7.7.7 connect-interface LoopBack 0
R6配置
sys
sysname R6
un in en
int g0/0/0
ip add 56.0.0.2 30
un sh
int g0/0/1
ip add 67.0.0.1 30
un sh
int g0/0/2
ip add 26.0.0.2 30
un sh
int g0/0/3
ip add 16.0.0.2 30
un sh
int loo 0
ip add 6.6.6.6 32
q
isis 1
network-entity 49.0001.0060.0600.6006.00
is-level level-1-2
import-route isis level-2 into level-1
int g0/0/1
isis en
int g0/0/2
isis en
int g0/0/3
isis en
int loo0
isis en
q
router id 6.6.6.6
bgp 56001
peer 1.1.1.1 as-number 56001
peer 1.1.1.1 connect-interface LoopBack 0
peer 2.2.2.2 as-number 56001
peer 2.2.2.2 connect-interface LoopBack 0
peer 5.5.5.5 as-number 56001
peer 5.5.5.5 connect-interface LoopBack 0
peer 7.7.7.7 as-number 56001
peer 7.7.7.7 connect-interface LoopBack 0
bgp 56001
reflector cluster-id 100
peer 1.1.1.1 reflect-client
peer 5.5.5.5 reflect-client
R7配置
sys
sysname R7
un in en
int g0/0/0
ip add 67.0.0.2 30
un sh
int g0/0/1
ip add 78.0.0.1 30
un sh
int g0/0/2
ip add 37.0.0.2 30
un sh
int loo 0
ip add 7.7.7.7 32
q
isis 1
network-entity 49.0000.0070.0700.7007.00
is-level level-2
int g0/0/0
isis en
int g0/0/2
isis en
int loo0
isis en
q
router id 7.7.7.7
bgp 56001
peer 1.1.1.1 as-number 56001
peer 1.1.1.1 connect-interface LoopBack 0
peer 3.3.3.3 as-number 56001
peer 3.3.3.3 connect-interface LoopBack 0
peer 5.5.5.5 as-number 56001
peer 5.5.5.5 connect-interface LoopBack 0
peer 6.6.6.6 as-number 56001
peer 6.6.6.6 connect-interface LoopBack 0
dis bgp peer
bgp 56001
reflector cluster-id 200
peer 6.6.6.6 reflect-client
q
ip route-static 8.8.8.8 32 78.0.0.2
bgp 56001
peer 8.8.8.8 as-number 56002
peer 8.8.8.8 connect-interface LoopBack 0
peer 8.8.8.8 ebgp-max-hop 2
peer 1.1.1.1 next-hop-local
peer 3.3.3.3 next-hop-local
import-route static
peer 5.5.5.5 next-hop-local
peer 6.6.6.6 next-hop-local
R8配置
sys
sysname R8
un in en
int g0/0/0
ip add 78.0.0.2 30
un sh
int g0/0/1
ip add 48.0.0.2 30
un sh
int loo0
ip add 8.8.8.8 32
q
ip route-static 7.7.7.7 32 78.0.0.1
router id 8.8.8.8
bgp 56002
peer 4.4.4.4 as-number 56002
peer 4.4.4.4 connect-interface LoopBack0
peer 4.4.4.4 enable
network 8.8.8.8 32
network 48.0.0.0 30
network 78.0.0.0 30
peer 7.7.7.7 as-number 56001
peer 7.7.7.7 connect-interface LoopBack 0
peer 7.7.7.7 ebgp-max-hop 2
结果验证
[R1]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 27 Routes : 30
Destination/Mask Proto Pre Cost Flags NextHop Interface
0.0.0.0/0 ISIS-L1 15 10 D 12.0.0.2 GigabitEthernet
0/0/0
ISIS-L1 15 10 D 16.0.0.2 GigabitEthernet
0/0/1
1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0
2.2.2.2/32 ISIS-L1 15 10 D 12.0.0.2 GigabitEthernet
0/0/0
3.3.3.3/32 ISIS-L1 15 20 D 12.0.0.2 GigabitEthernet
0/0/0
4.4.4.4/32 IBGP 255 0 RD 3.3.3.3 GigabitEthernet
0/0/0
5.5.5.5/32 ISIS-L1 15 20 D 12.0.0.2 GigabitEthernet
0/0/0
6.6.6.6/32 ISIS-L1 15 10 D 16.0.0.2 GigabitEthernet
0/0/1
7.7.7.7/32 ISIS-L1 15 20 D 16.0.0.2 GigabitEthernet
0/0/1
8.8.8.8/32 IBGP 255 0 RD 7.7.7.7 GigabitEthernet
0/0/1
11.0.0.0/30 Direct 0 0 D 11.0.0.1 LoopBack1
11.0.0.1/32 Direct 0 0 D 127.0.0.1 LoopBack1
12.0.0.0/30 Direct 0 0 D 12.0.0.1 GigabitEthernet
0/0/0
12.0.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
16.0.0.0/30 Direct 0 0 D 16.0.0.1 GigabitEthernet
0/0/1
16.0.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
23.0.0.0/30 ISIS-L1 15 20 D 12.0.0.2 GigabitEthernet
0/0/0
25.0.0.0/30 ISIS-L1 15 20 D 12.0.0.2 GigabitEthernet
0/0/0
26.0.0.0/30 ISIS-L1 15 20 D 12.0.0.2 GigabitEthernet
0/0/0
ISIS-L1 15 20 D 16.0.0.2 GigabitEthernet
0/0/1
34.0.0.0/30 IBGP 255 0 RD 3.3.3.3 GigabitEthernet
0/0/0
37.0.0.0/30 ISIS-L1 15 30 D 12.0.0.2 GigabitEthernet
0/0/0
ISIS-L1 15 30 D 16.0.0.2 GigabitEthernet
0/0/1
44.0.0.0/30 IBGP 255 0 RD 3.3.3.3 GigabitEthernet
0/0/0
---- More ----
[R2]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 27 Routes : 29
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.1/32 ISIS-L1 15 10 D 12.0.0.1 GigabitEthernet
0/0/0
2.2.2.2/32 Direct 0 0 D 127.0.0.1 LoopBack0
3.3.3.3/32 ISIS-L2 15 10 D 23.0.0.2 GigabitEthernet
0/0/1
4.4.4.4/32 IBGP 255 0 RD 3.3.3.3 GigabitEthernet
0/0/1
5.5.5.5/32 ISIS-L1 15 10 D 25.0.0.1 GigabitEthernet
0/0/3
6.6.6.6/32 ISIS-L1 15 10 D 26.0.0.2 GigabitEthernet
0/0/2
7.7.7.7/32 ISIS-L2 15 20 D 26.0.0.2 GigabitEthernet
0/0/2
ISIS-L2 15 20 D 23.0.0.2 GigabitEthernet
0/0/1
8.8.8.8/32 IBGP 255 0 RD 7.7.7.7 GigabitEthernet
0/0/2
IBGP 255 0 RD 7.7.7.7 GigabitEthernet
0/0/1
11.0.0.0/30 IBGP 255 0 RD 1.1.1.1 GigabitEthernet
0/0/0
12.0.0.0/30 Direct 0 0 D 12.0.0.2 GigabitEthernet
0/0/0
12.0.0.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
16.0.0.0/30 ISIS-L1 15 20 D 12.0.0.1 GigabitEthernet
0/0/0
ISIS-L1 15 20 D 26.0.0.2 GigabitEthernet
0/0/2
23.0.0.0/30 Direct 0 0 D 23.0.0.1 GigabitEthernet
0/0/1
23.0.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
25.0.0.0/30 Direct 0 0 D 25.0.0.2 GigabitEthernet
0/0/3
25.0.0.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/3
26.0.0.0/30 Direct 0 0 D 26.0.0.1 GigabitEthernet
0/0/2
26.0.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
34.0.0.0/30 IBGP 255 0 RD 3.3.3.3 GigabitEthernet
0/0/1
37.0.0.0/30 ISIS-L2 15 20 D 23.0.0.2 GigabitEthernet
0/0/1
44.0.0.0/30 IBGP 255 0 RD 3.3.3.3 GigabitEthernet
0/0/1
---- More ----
[R3]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 26 Routes : 28
Destination/Mask Proto Pre Cost Flags NextHop Interface
1.1.1.1/32 ISIS-L2 15 20 D 23.0.0.1 GigabitEthernet
0/0/0
2.2.2.2/32 ISIS-L2 15 10 D 23.0.0.1 GigabitEthernet
0/0/0
3.3.3.3/32 Direct 0 0 D 127.0.0.1 LoopBack0
4.4.4.4/32 Static 60 0 RD 34.0.0.2 GigabitEthernet
0/0/1
5.5.5.5/32 ISIS-L2 15 20 D 23.0.0.1 GigabitEthernet
0/0/0
6.6.6.6/32 ISIS-L2 15 20 D 23.0.0.1 GigabitEthernet
0/0/0
ISIS-L2 15 20 D 37.0.0.2 GigabitEthernet
0/0/2
7.7.7.7/32 ISIS-L2 15 10 D 37.0.0.2 GigabitEthernet
0/0/2
8.8.8.8/32 IBGP 255 0 RD 7.7.7.7 GigabitEthernet
0/0/2
11.0.0.0/30 IBGP 255 0 RD 1.1.1.1 GigabitEthernet
0/0/0
12.0.0.0/30 ISIS-L2 15 20 D 23.0.0.1 GigabitEthernet
0/0/0
16.0.0.0/30 ISIS-L2 15 30 D 23.0.0.1 GigabitEthernet
0/0/0
ISIS-L2 15 30 D 37.0.0.2 GigabitEthernet
0/0/2
23.0.0.0/30 Direct 0 0 D 23.0.0.2 GigabitEthernet
0/0/0
23.0.0.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
25.0.0.0/30 ISIS-L2 15 20 D 23.0.0.1 GigabitEthernet
0/0/0
26.0.0.0/30 ISIS-L2 15 20 D 23.0.0.1 GigabitEthernet
0/0/0
34.0.0.0/30 Direct 0 0 D 34.0.0.1 GigabitEthernet
0/0/1
34.0.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
37.0.0.0/30 Direct 0 0 D 37.0.0.1 GigabitEthernet
0/0/2
37.0.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/2
44.0.0.0/30 EBGP 255 0 RD 4.4.4.4 GigabitEthernet
0/0/1
48.0.0.0/30 EBGP 255 0 RD 4.4.4.4 GigabitEthernet
0/0/1
56.0.0.0/30 ISIS-L2 15 30 D 23.0.0.1 GigabitEthernet
0/0/0
---- More ----
[R4]dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 14 Routes : 14
Destination/Mask Proto Pre Cost Flags NextHop Interface
3.3.3.3/32 Static 60 0 RD 34.0.0.1 GigabitEthernet
0/0/0
4.4.4.4/32 Direct 0 0 D 127.0.0.1 LoopBack0
7.7.7.7/32 IBGP 255 0 RD 8.8.8.8 GigabitEthernet
0/0/0
8.8.8.8/32 EBGP 255 0 RD 3.3.3.3 GigabitEthernet
0/0/0
11.0.0.0/30 EBGP 255 0 RD 3.3.3.3 GigabitEthernet
0/0/0
34.0.0.0/30 Direct 0 0 D 34.0.0.2 GigabitEthernet
0/0/0
34.0.0.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
44.0.0.0/30 Direct 0 0 D 44.0.0.1 LoopBack1
44.0.0.1/32 Direct 0 0 D 127.0.0.1 LoopBack1
48.0.0.0/30 Direct 0 0 D 48.0.0.1 GigabitEthernet
0/0/1
48.0.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
78.0.0.0/30 IBGP 255 0 RD 8.8.8.8 GigabitEthernet
0/0/0
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
[R4]
