cisco_LAB
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IGP
须知：
After finishing each of the following questions,make sure that all configured interfaces and
subnets are consistently visible on all pertinent routers and switches.
Don’t redistribute between and interior gateway protocol(IGP) and board gateway protocol(BGP).
You need to ping a bgp route only if it is stated in a question,otherwise the route should be only in
the bgp table.
At the end of section 2,all subnets in your topology,including the loopback interface expected for
SW3,must be reachable via ping.
Therefore redistribute as you wish unless directly stated in a question.The backbone interface must
be reachable only if they are part of the solution to a question.
The loopback interface can be seen as either /24 or /32 in the routing table unless stated otherwise
in a question.
The loopback interfaces can be added into your IGP either via redistribution or added to a routing
process of your choice.
须知注解：
1．当完成IGP之后，所有配置了的接口以及网段需要在所有路由器和交换机上学习到。（这几年来，这些需求不包含连接BB的接口和网段）
2．不能在IGP和BGP之间重分布，BGP的路由不需要ping通，除非题目明确说明要ping通，路由只需要BGP看见即可。
3．完成IGP之后，所有接口，包含loopback都要能ping通，SW3不需要。
4．在连BB的接口需要用到时，可以被重分布。
5．loopback地址可以被重分布，也可以直接放入路由协议，由自己选择。
返回目录
OSPF
原题：
Implement IPv4 OSPF
Configure open shortest path first(OSPF)
Updates should be advertised only out of the interface that are indicated in the IGP topology
diagram.
Don’t manually change the Router-ID
Don’t create additional ospf ares.
Configre ospf area 2 such that there are no TYPE-5 Advertisments(LSA)in the area,R1 should
generate a default route.
Configure OSPF over frame relay between R1 and R2 choosing a network type that requires
designate router(DR) and backup designate router(BDR)negotiations and has the fatest recover
times.
中文注释：
1．按照IGP的拓朴将接口发布，但不能手工配置Router-ID，不能创建额外Area。 2．配置Area 2 不接收TYPE-5的LSA，R1向区域内产生一条默认路由。
3．将R1与R2的frame relay环境配置为需要选举DR和BDR的网络类型，并且开启Fast
Hellos功能。
配置：
说明：此题配置共分为3步。
1．在各路由器上配置OSPF：
说明：共分1小步。
（1）在各路由器上配置OSPF：
R1：
router ospf 2
network 2.2.1.1 0.0.0.0 area 0
network 2.2.15.161 0.0.0.0 area 0
network 2.2.15.242 0.0.0.0 area 2
R2：
router ospf 2
network 2.2.2.2 0.0.0.0 area 2
network 2.2.15.241 0.0.0.0 area 2
network 2.2.15.129 0.0.0.0 area 2
R3：
router ospf 2
network 2.2.3.3 0.0.0.0 area 0
network 2.2.15.193 0.0.0.0 area 0
SW1：
Ip routing
router ospf 2
network 2.2.7.7 0.0.0.0 area 0
network 2.2.15.162 0.0.0.0 area 0
network 2.2.15.194 0.0.0.0 area 0
SW2：
Ip routing
router ospf 2
network 2.2.8.8 0.0.0.0 area 2
network 2.2.15.130 0.0.0.0 area 2
2．配置Area 2为NSSA：
说明：共分1小步。
（1）配置Area 2为NSSA，并发布默认路由：
R1：
router ospf 2
area 2 nssa
area 2 nssa default-information-originate
R2：
router ospf 2
area 2 nssa
SW2：
router ospf 2
area 2 nssa
3．改变接口类型：
说明：共分1小步。
（1）改变R1与R2之间的接口类型：
R1：
interface s0/0.12
ip ospf network broadcast
ip os dead-interval minimal hello-multiplier 4
R2：
interface s0/0.12
ip ospf network broadcast
ip os dead-interval minimal hello-multiplier 4
