实验offset-list与访问控制列表结合对单个路由的metric控制
offset-list适用于距离矢量路由协议，本实验采用RIPv2以及EIGRP，可对照实验手册二下册16.3进行实验
Topo 如下:




分别控制路由条目1.1.1.0/24，2.2.2.0/24，5.5.5.0/24，3.3.3.0/24
8.8.8.0/24做为比对。

配置如下：

r1#sh ru
interface Loopback0

ip address 1.1.1.1 255.255.255.0
!
interface Ethernet0/0

ip address 10.1.1.1 255.255.255.0
!
interface Serial1/0

ip address 12.1.1.1 255.255.255.0
!
router eigrp 100

offset-list 21 in 1888256 Ethernet0/0

#对控制列表21 的EIGRP路由度量值修改
offset-list 25 out 1888256 Ethernet0/0

#对控制列表25的EIGRP路由度量值修改

network 1.1.1.0 0.0.0.255

network 10.1.1.0 0.0.0.255

network 12.1.1.0 0.0.0.255

no auto-summary
!
access-list 21 permit 2.2.2.0
access-list 21 permit 5.5.5.0
access-list 21 deny
any
access-list 25 permit 1.1.1.0
access-list 25 deny
any
!
End



r2#sh ru
interface Loopback0

ip address 2.2.2.2 255.255.255.0
!
interface Loopback1

ip address 5.5.5.5 255.255.255.0
!
interface Loopback2

ip address 8.8.8.8 255.255.255.0
!
interface Ethernet0/0

ip address 10.1.1.2 255.255.255.0
!
interface Serial1/0

ip address 23.1.1.2 255.255.255.0
!
interface Serial2/0

ip address 12.1.1.2 255.255.255.0
!
router eigrp 100

network 2.2.2.0 0.0.0.255

network 5.5.5.0 0.0.0.255
network 8.8.8.0 0.0.0.255

network 10.1.1.0 0.0.0.255

network 12.1.1.0 0.0.0.255

no auto-summary
!
router rip

version 2

network 23.0.0.0

no auto-summary
!
End


r3#sh ru
interface Loopback0

ip address 3.3.3.3 255.255.255.0
!
interface Serial2/0

ip address 23.1.1.3 255.255.255.0
!
router rip

version 2

offset-list 0 out 10 Serial2/0
#对所有出去的RIP路由度量值修改(0代表所有)

network 3.0.0.0

network 23.0.0.0

no auto-summary
!
End

r1#sh ip eigrp topo
IP-EIGRP Topology Table for AS(100)/ID(1.1.1.1)

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,

r - reply Status, s - sia Status

P 1.1.1.0/24, 1 successors, FD is 128256

via Connected, Loopback0
P 2.2.2.0/24, 2 successors, FD is 2297856

via 12.1.1.2 (2297856/128256), Serial1/0

via 10.1.1.2 (2297856/2016512), Ethernet0/0
P 5.5.5.0/24, 2 successors, FD is 2297856

via 12.1.1.2 (2297856/128256), Serial1/0

via 10.1.1.2 (2297856/2016512), Ethernet0/0
P 8.8.8.0/24, 1 successors, FD is 409600
#8.8.8.0的路由未做控制所以保持不变

via 10.1.1.2 (409600/128256), Ethernet0/0

via 12.1.1.2 (2297856/128256), Serial1/0
P 10.1.1.0/24, 1 successors, FD is 281600

via Connected, Ethernet0/0
P 12.1.1.0/24, 1 successors, FD is 2169856

via Connected, Serial1/0
r1# sh ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set


1.0.0.0/24 is subnetted, 1 subnets
C
1.1.1.0 is directly connected, Loopback0

2.0.0.0/24 is subnetted, 1 subnets
D
2.2.2.0 [90/2297856] via 10.1.1.2, 00:42:06, Ethernet0/0

[90/2297856] via 12.1.1.2, 00:42:06, Serial1/0

5.0.0.0/24 is subnetted, 1 subnets
D
5.5.5.0 [90/2297856] via 10.1.1.2, 00:42:06, Ethernet0/0

[90/2297856] via 12.1.1.2, 00:42:06, Serial1/0

8.0.0.0/24 is subnetted, 1 subnets
D
8.8.8.0 [90/409600] via 10.1.1.2, 00:00:14, Ethernet0/0

10.0.0.0/24 is subnetted, 1 subnets
C
10.1.1.0 is directly connected, Ethernet0/0

12.0.0.0/24 is subnetted, 1 subnets
C
12.1.1.0 is directly connected, Serial1/0

r2#sh ip eigrp topology
IP-EIGRP Topology Table for AS(100)/ID(5.5.5.5)

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,

r - reply Status, s - sia Status

P 1.1.1.0/24, 2 successors, FD is 2297856

via 12.1.1.1 (2297856/128256), Serial2/0

via 10.1.1.1 (2297856/2016512), Ethernet0/0
P 2.2.2.0/24, 1 successors, FD is 128256

via Connected, Loopback0
P 5.5.5.0/24, 1 successors, FD is 128256

via Connected, Loopback1
P 8.8.8.0/24, 1 successors, FD is 128256

via Connected, Loopback2
P 10.1.1.0/24, 1 successors, FD is 281600

via Connected, Ethernet0/0
P 12.1.1.0/24, 1 successors, FD is 2169856

via Connected, Serial2/0
r2#sh ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set


1.0.0.0/24 is subnetted, 1 subnets
D
1.1.1.0 [90/2297856] via 12.1.1.1, 00:00:25, Serial2/0

[90/2297856] via 10.1.1.1, 00:00:25, Ethernet0/0

2.0.0.0/24 is subnetted, 1 subnets
C
2.2.2.0 is directly connected, Loopback0

3.0.0.0/24 is subnetted, 1 subnets
R
3.3.3.0 [120/11] via 23.1.1.3, 00:00:16, Serial1/0

5.0.0.0/24 is subnetted, 1 subnets
C
5.5.5.0 is directly connected, Loopback1

23.0.0.0/24 is subnetted, 1 subnets
C
23.1.1.0 is directly connected, Serial1/0

8.0.0.0/24 is subnetted, 1 subnets
C
8.8.8.0 is directly connected, Loopback2

10.0.0.0/24 is subnetted, 1 subnets
C
10.1.1.0 is directly connected, Ethernet0/0

12.0.0.0/24 is subnetted, 1 subnets
C
12.1.1.0 is directly connected, Serial2/0


当然，rip也可以做单个路由metric控制，这里就不列举了。

恩,看了知道了很多控制的方法拉,不过得好好研究了

感觉Juniper路由器的命令跟UNIX很接近。