CCNP-3 EIGRP试验3(BSCI)
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CCNP-3 EIGRP试验3
实验拓扑：
试验要求： 1-R1,R2,R3,R4 通过 Frame-relay 构成一个 hub and spoke 类型的网络， R1 为 hub 路由器， R2,R3,R4 为 sopke 路由器。全部起 EIGRP 路由协议。
2- 按照拓扑上的链路带宽标示配置各自的借口带宽。
3-R1 先用点对点子接口，然后再用点对多点子接口。 R2,R3,R4 全部采用点对点子接口。
试验目的：掌握在 NBMA 环境下 hub and sopke 拓扑中， EIGRP 的带宽配置方法。
实验配置：
FR-Switch ：
interface Serial0/0
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay intf-type dce
frame-relay route 401 interface Serial0/1 104
frame-relay route 402 interface Serial0/2 204
frame-relay route 403 interface Serial0/3 304
!
interface Serial0/1
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay intf-type dce
frame-relay route 104 interface Serial0/0 401
!
interface Serial0/2
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay intf-type dce
frame-relay route 204 interface Serial0/0 402
!
interface Serial0/3
no ip address
encapsulation frame-relay
serial restart-delay 0
frame-relay intf-type dce
frame-relay route 304 interface Serial0/0 403
R1 ：
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.1 point-to-point
bandwidth 64
ip address 199.99.1.1 255.255.255.0
frame-relay interface-dlci 401
!
interface Serial1/0.2 point-to-point
bandwidth 64
ip address 199.99.2.1 255.255.255.0
frame-relay interface-dlci 402
!
interface Serial1/0.3 point-to-point
bandwidth 56
ip address 199.99.3.1 255.255.255.0
frame-relay interface-dlci 403
!
router eigrp 100
network 199.99.1.0
network 199.99.2.0
network 199.99.3.0
auto-summary
R2 ：
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.1 point-to-point
bandwidth 64
ip address 199.99.1.2 255.255.255.0
frame-relay interface-dlci 104
!
router eigrp 100
network 199.99.1.0
auto-summary
R3 ：
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.1 point-to-point
bandwidth 64
ip address 199.99.2.2 255.255.255.0
frame-relay interface-dlci 204
!
router eigrp 100
network 199.99.2.0
auto-summary
R4 ：
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.1 point-to-point
bandwidth 56
ip address 199.99.3.2 255.255.255.0
frame-relay interface-dlci 304
!
router eigrp 100
network 199.99.3.0
auto-summary
以上为基本配置，要注意带宽是在子接口下配置的，下面为每台 spoke 路由器的 show ip route 和 show ip eigrp topology ：
R2#show 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
D 199.99.3.0/24 [90/ 46738176 ] via 199.99.1.1, 00:00:11, Serial1/0.1
D 199.99.2.0/24 [90/ 41024000 ] via 199.99.1.1, 00:00:11, Serial1/0.1
C 199.99.1.0/24 is directly connected, Serial1/0.1
R2#show ip eigrp topology
IP-EIGRP Topology Table for AS(100)/ID(199.99.1.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 199.99.1.0/24, 1 successors, FD is 40512000
via Connected, Serial1/0.1
P 199.99.2.0/24, 1 successors, FD is 41024000
via 199.99.1.1 (41024000/40512000), Serial1/0.1
P 199.99.3.0/24, 1 successors, FD is 46738176
via 199.99.1.1 (46738176/46226176), Serial1/0.1
R3#show 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
D 199.99.3.0/24 [90/ 46738176 ] via 199.99.2.1, 00:00:10, Serial1/0.1
C 199.99.2.0/24 is directly connected, Serial1/0.1
D 199.99.1.0/24 [90/ 41024000 ] via 199.99.2.1, 00:00:10, Serial1/0.1
R3#show ip eigrp topology
IP-EIGRP Topology Table for AS(100)/ID(199.99.2.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 199.99.1.0/24, 1 successors, FD is 41024000
via 199.99.2.1 (41024000/40512000), Serial1/0.1
P 199.99.2.0/24, 1 successors, FD is 40512000
via Connected, Serial1/0.1
P 199.99.3.0/24, 1 successors, FD is 46738176
via 199.99.2.1 (46738176/46226176), Serial1/0.1
R4#show 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
C 199.99.3.0/24 is directly connected, Serial1/0.1
D 199.99.2.0/24 [90/46738176] via 199.99.3.1, 00:00:01, Serial1/0.1
D 199.99.1.0/24 [90/46738176] via 199.99.3.1, 00:00:01, Serial1/0.1
R4#show ip eigrp topology
IP-EIGRP Topology Table for AS(100)/ID(199.99.3.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 199.99.1.0/24, 1 successors, FD is 46738176
via 199.99.3.1 (46738176/40512000), Serial1/0.1
P 199.99.2.0/24, 1 successors, FD is 46738176
via 199.99.3.1 (46738176/40512000), Serial1/0.1
P 199.99.3.0/24, 1 successors, FD is 46226176
via Connected, Serial1/0.1
通过对上面输出的分析可以知道所有 sopke 路由器从 EIGRP 学到的路由都要经过 hub 路由器，并且 R2 和 R3 到 R4 的 metric 值与到其余 spoke 的值不等，而 R4 到其他 spoke 路由器的 metric 值相等。
注意：一般在 NBMA 的 hub and spoke 环境下，如果有多条链路带宽相等，只有个别链路带宽小于其余链路的带宽的时候，我们可以在 hub 路由器上分别配置点到多点子接口和点到点子接口 ，如下所示：
R1 ：
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.1 multipoint
bandwidth 128
ip address 199.99.1.1 255.255.255.0
frame-relay map ip 199.99.1.2 401 broadcast
frame-relay map ip 199.99.1.3 402 broadcast
!
interface Serial1/0.2 point-to-point
ip address 199.99.2.1 255.255.255.0
frame-relay interface-dlci 403
!
router eigrp 100
network 199.99.1.0
network 199.99.2.0
auto-summary
（忘记配置 S1/0.2 的 bandwidth 了，不过不影响试验）
R2 ：
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.1 point-to-point
bandwidth 64
ip address 199.99.1.2 255.255.255.0
frame-relay interface-dlci 104
!
router eigrp 100
network 199.99.1.0
auto-summary
R3 ：
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.1 point-to-point
bandwidth 64
ip address 199.99.1.3 255.255.255.0
frame-relay interface-dlci 204
!
router eigrp 100
network 199.99.1.0
auto-summary
R4 ：
interface Serial1/0
no ip address
encapsulation frame-relay
serial restart-delay 0
!
interface Serial1/0.1 point-to-point
bandwidth 56
ip address 199.99.2.2 255.255.255.0
frame-relay interface-dlci 304
!
router eigrp 100
network 199.99.2.0
auto-summary
下面是每台 spoke 路由器的 show ip route 和 show ip eigrp topology ：
R2#show 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
D 199.99.2.0/24 [90/41024000] via 199.99.1.1, 00:00:40, Serial1/0.1
C 199.99.1.0/24 is directly connected, Serial1/0.1
R2#show ip eigrp topology
IP-EIGRP Topology Table for AS(100)/ID(199.99.1.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 199.99.1.0/24, 1 successors, FD is 40512000
via Connected, Serial1/0.1
P 199.99.2.0/24, 1 successors, FD is 41024000
via 199.99.1.1 (41024000/2169856), Serial1/0.1
R3#show 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
D 199.99.2.0/24 [90/41024000] via 199.99.1.1, 00:00:00, Serial1/0.1
C 199.99.1.0/24 is directly connected, Serial1/0.1
R3#show ip eigrp topology
IP-EIGRP Topology Table for AS(100)/ID(199.99.1.3)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 199.99.1.0/24, 1 successors, FD is 40512000
via Connected, Serial1/0.1
P 199.99.2.0/24, 1 successors, FD is 41024000
via 199.99.1.1 (41024000/2169856), Serial1/0.1
R4#show 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
C 199.99.2.0/24 is directly connected, Serial1/0.1
D 199.99.1.0/24 [90/46738176] via 199.99.2.1, 00:00:04, Serial1/0.1
R4#show ip eigrp topology
IP-EIGRP Topology Table for AS(100)/ID(199.99.2.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 199.99.1.0/24, 1 successors, FD is 46738176
via 199.99.2.1 (46738176/20512000), Serial1/0.1
P 199.99.2.0/24, 1 successors, FD is 46226176
via Connected, Serial1/0.1
注意用红色标记的 metric 值的差别。还要记住在 hub 点到多点子接口上配置的带宽应为 spoke 带宽的总和，这里 128=64+64 。
试验总结：通过本试验掌握了在 NBMA 部分网格环境中，点到点和点到多点子接口定义带宽的方法和配置过程。
本文转自loveme2351CTO博客，原文链接：http://blog.51cto.com/loveme23/45495 ，如需转载请自行联系原作者
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