帧中继 - 帧中继交换机和路由器配置
附件是一个比较奇怪的拓扑图，实验需要达成以下几点目的
1.配置帧中继交换机
2.使用主端口，多点子接口，点到点子接口配置路由器，配置时禁用动态map，使用共有协议配置，提供链路广播能力
3.每个路由器开启一个lookback接口，启用EIGRP，全互通
开始
1. 帧中继交换机配置
en
conf t
frame-relay switching
interface Serial2/0
no ip address
encapsulation frame-relay IETF
clock rate 64000
frame-relay lmi-type ansi
frame-relay intf-type dce
frame-relay route 401 interface Serial2/1 104
frame-relay route 403 interface Serial2/3 304
no shutdown
interface Serial2/1
no ip address
encapsulation frame-relay IETF
clock rate 64000
frame-relay lmi-type ansi
frame-relay intf-type dce
frame-relay route 102 interface Serial2/2 201
frame-relay route 104 interface Serial2/0 401
no shutdown
interface Serial2/2
no ip address
encapsulation frame-relay IETF
clock rate 64000
frame-relay lmi-type ansi
frame-relay intf-type dce
frame-relay route 201 interface s2/1 102
no shutdown
interface Serial2/3
no ip address
encapsulation frame-relay IETF
clock rate 64000
frame-relay lmi-type ansi
frame-relay intf-type dce
frame-relay route 304 interface Serial2/0 403
no shutdown
2.根据拓扑图中所示，R1使用点到点子接口，R2使用多点子接口，R3使用主接口，R4使用多点子接口
R1
interface Serial2/0
no ip address
encapsulation frame-relay IETF
no arp frame-relay
no frame-relay inverse-arp
frame-relay lmi-type ansi
no shutdown
interface Serial2/0.1 point-to-point
ip address 12.1.1.1 255.255.255.0
no arp frame-relay
frame-relay interface-dlci 102
interface Serial2/0.2 point-to-point
ip address 134.1.1.1 255.255.255.0
no arp frame-relay
frame-relay interface-dlci 104
R2
interface Serial2/0
no ip address
encapsulation frame-relay IETF
no arp frame-relay
no frame-relay inverse-arp
frame-relay lmi-type ansi
interface Serial2/0.1 multipoint
no arp frame-relay
frame-relay map ip 12.1.1.1 201 broadcast IETF
no frame-relay inverse-arp
R3
interface Serial2/0
ip address 134.1.1.3 255.255.255.0
encapsulation frame-relay IETF
no arp frame-relay
frame-relay map ip 134.1.1.4 304 broadcast IETF
no frame-relay inverse-arp
frame-relay lmi-type ansi
no shutdown
R4
interface Serial2/0
no ip address
encapsulation frame-relay IETF
no arp frame-relay
no frame-relay inverse-arp
frame-relay lmi-type ansi
interface Serial2/0.1 multipoint
ip address 134.1.1.4 255.255.255.0
no arp frame-relay
frame-relay map ip 134.1.1.3 403 broadcast IETF
frame-relay map ip 134.1.1.1 401 broadcast IETF
no frame-relay inverse-arp
3.lookback接口配置，和EIGRP路由协议
R1
interface Loopback0
ip address 1.1.1.1 255.255.255.0
router eigrp 1
no auto-summary
network 1.1.1.1 0.0.0.0
network 12.1.1.1 0.0.0.0
network 134.1.1.1 0.0.0.0
R2
interface Loopback0
ip address 2.2.2.2 255.255.255.0
router eigrp 1
no auto-summary
network 2.2.2.2 0.0.0.0
network 12.1.1.2 0.0.0.0
R3
interface Loopback0
ip address 3.3.3.3 255.255.255.0
router eigrp 1
no auto-summary
network 3.3.3.3 0.0.0.0
network 134.1.1.3 0.0.0.0
R4
interface Loopback0
ip address 4.4.4.4 255.255.255.0
router eigrp 1
no auto-summary
network 4.4.4.4 0.0.0.0
network 134.1.1.4 0.0.0.0
由于R4的水平分割的存在，R2，R3不会收到对方的路由信息。因此需要在R4上关闭水平分割。
R4
interface Serial2/0.1 multipoint
no frame-relay inverse-arp