CCIE实验手册

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CCIE R&S v4.0 实验

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CCIE LAB K1

目录

K1 拓朴 VTP VLAN 2层接口 Frame relay Storm contrl Trunk OSPF EIGRP RIP V2 IPv6 BGP

Multicast Secure HTTP PPP CHAP 认证 Class-Base FRTS Auto QOS GLBP NTP DHCP Netflow EEM TFTP

K1 拓朴

实验拓朴图:

设备串口连接拓朴图:

注:

★本文档所有配置基于2号机架,所以Y取值为2。 ★所有设备loopback0 地址为 Y.Y.X.X/32,分别为: R1:2.2.1.1/32 R2:2.2.2.2/32 R3:2.2.3.3/32 R4:2.2.4.4/32 R5:2.2.5.5/32 SW1:2.2.7.7/32 SW2:2.2.8.8/32 SW3:2.2.9.9/32 SW4:2.2.10.10/32

★BackBone地址分别为: BB1:150.1.2.254/24 BB2:150.2.2.254/24 BB3:150.3.2.254/24

★其中,G与F相等,0/0与0/0/0相等。 返回目录

VTP

4台交换机上全部配置VTP域名为:CCIERoutingandSwitching,密码为:cisco,模式为透明模式。

配置:

说明:此题配置共分为1步。

1.在4台交换机上配置VTP:

说明:共分1小步。

(1)在4台交换机上同时做如下配置: vtp domain CCIERoutingandSwitching vtp password cisco

vtp mode transparen

返回目录

VLAN

交换机上的VLAN信息如下: Vlan Number VLAN 15 VLAN 2 VLAN 3 VLAN 11 VLAN 13 VLAN 22 VLAN 24 VLAN 44 VLAN 45

Vlan Name VLAN_BB1 VLAN_BB2 VLAN_BB3 VLAN_A VLAN_B VLAN_C VLAN_H VLAN_F VLAN_G Ports SW1-F0/5,SW1-F0/10 SW2-F0/10 SW1-F0/3,SW3-F0/10 SW2-F0/1 SW2-F0/3 R2-F0/1.Z R2-F0/1.Z,SW2-F0/4 SW1-F0/4 SW2-F0/5 配置:

说明:此题配置共分为1步。

1. 在4台交换机上配置VLAN:

说明:共分1小步。

(1)在4台交换机上同时做如下配置:

VLAN 15 name VLAN_BB1 exit VLAN 2 name VLAN_BB2 exit VLAN 3 name VLAN_BB3 exit VLAN 11 name VLAN_A exit VLAN 13 name VLAN_B exit VLAN 22 name VLAN_C exit VLAN 24 name VLAN_H exit VLAN 44

name VLAN_F exit VLAN 45 name VLAN_G exit

返回目录

2层接口

原题:

Implement the access-switch ports of switched network

Configure all of the appropriate nontrunking access switch ports on sw1,sw2,sw3,according to the following requirements:

Configure the VLANS for the access switch ports show as the vlan tables,include the ports to BB1,BB2 and BB3. Configure trunk between SW2 F0/2 and R2 G0/1.

Make sure that the spanning tree enters the forwarding state immediately. Only for these access switch ports,bypassing the listening and learning states.

Avoid transmitting bridge protocol date units(BPDUS)on these access switch ports.If a BPDU is received on any of these ports,the ports should transition back to the listening,learning and forward states.

Add any special layer 2 commands that are required on the routers including trunk configuration.

中文注释:

1.在SW1,SW2,SW3上将所有相关的access接口全部划入图表中相应的VLAN,其中包括连接BB1,BB2和BB3的接口。

2.在SW2的F0/2和R2的G0/1之间创建单臂路由,使得R2的G0/1能同时连接VLAN 22和VLAN 24。

3.让交换机上所有的access接口在STP计算时,跳过监听和学习状态,并且不转发BPDU。

配置:

说明:此题配置共分为3步。

1.将各交换机上所有相应access接口划入相应VLAN:

说明:共分3小步。

(1)在SW1上将所有相应access接口划入相应VLAN: int f0/3

switchport mode access switchport access vlan 3 exit int f0/4

switchport mode access switchport access vlan 44 exit

int f0/5

switchport mode access switchport access vlan 15 exit int f0/10

switchport mode access switchport access vlan 15 exit

(2)在SW2上将所有相应access接口划入相应VLAN: int f0/1

switchport mode access switchport access vlan 11 exit int f0/3

switchport mode access switchport access vlan 13 exit int f0/4

switchport mode access switchport access vlan 24 exit

int f0/5

switchport mode access switchport access vlan 45 exit int f0/10

switchport mode access switchport access vlan 2 exit

(3)在SW3上将所有相应access接口划入相应VLAN: int f0/10

switchport mode access switchport access vlan 3 exit

2.在SW2的F0/2与R2的G0/1之间创建单臂路由:

说明:共分2小步。

(1)将SW2的F0/2配置为Trunk,并且只允许vlan 22和vlan 24: interface f0/2

switchport trunk encapsulation dot1q switchport mode trunk

switchport trunk allowed vlan 22,24 exit

(2)在R2的G0/1上创建子接口: int f0/1.22

encapsulation dot1Q 22

ip address 2.2.15.129 255.255.255.224 exit int f0/1.24

encapsulation dot1Q 24

ip address 2.2.15.34 255.255.255.224

3.配置所有交换机的所有access接口跳过STP,并不转发BPDU:

说明:共分1小步。

(1)在4台交换机上同时做如下配置: spanning-tree portfast default

spanning-tree portfast bpdufilter default

返回目录

Frame relay

原题:

Implement Frame relay

Use the following requirements to configure R1 and R2 for frame relay and R4 as the frame relay switch.

Use ANSI LMI on frame relay switch and auto-sesing on R1 and R2. Don’t use any static frame relay maps or inverse address resolutions protocol.

Use RFC 1490/RFC2427(IETF)encapsulation.

Use the data-link connection Identifer DLCI assignments from the table below

Frame Relay DLCI assignments Router R1 Frame-relay interface R2 Frame-relay interface

200 DLCI assignments 100 中文注释:

1.将R4配置为Frame-relay交换机,使用IETF封装,LMI类型为ANSI。 2.在R1与R2之间配置Frame-relay,避免静态映射与动态学习(则使用点到点子接口)。

配置:

说明:此题配置共分为2步。

1.配置R4为Frame-relay交换机:

说明:共分1小步。

(1)配置R4为Frame-relay交换机: frame-relay switching interface s0/0 no ip address

encapsulation frame-relay ietf frame-relay lmi-type ansi frame-relay intf-type dce clock rate 64000

frame-relay route 100 interface s0/1 200 no shutdown exit

interface s0/1 no ip address

encapsulation frame-relay ietf frame-relay lmi-type ansi frame-relay intf-type dce clock rate 64000

frame-relay route 200 interface s0/0 100 no shutdown exit

2.配置R1,R2 的frame-relay接口:

说明:共分2小步。

(1)配置R1的frame-relay接口: interface s0/0

encapsulation frame-relay ietf frame-relay lmi-type ansi no frame-relay inverse-arp no arp frame-relay no ip address no shutdown exit

interface s0/0.12 point-to-point ip address 2.2.15.242 255.255.255.252 frame-relay interface-dlci 100

(2)配置R2的frame-relay接口: interface s0/0

encapsulation frame-relay ietf frame-relay lmi-type ansi no frame-relay inverse-arp no arp frame-relay no ip address no shutdown exit

interface s0/0.12 point-to-point ip address 2.2.15.241 255.255.255.252 frame-relay interface-dlci 200

返回目录

Storm contrl

原题:

Traffic control protection from the backbones

Configure traffic control on the three backbone links,protecting your network from a broadcast storm.This protection should begin once broadcast traffic is half(50%)available bandwidth,the port should remain functioning during this time.

中文注释:

1.在交换机上配置Storm contrl,控制连接backbone的接口broadcast流量不超过50%,即使超过后,不能影响其它。

配置:

说明:此题配置共分为1步。

1.在SW1,SW2,SW3上配置storm-control:

说明:共分1小步。

(1)在SW1,SW2,SW3的F0/10上同时做如下配置: interface f0/10

storm-control multicast level 50.00

返回目录

Trunk

原题:

Trunking manipulations

Configure the trunk ports between SW1,SW2,SW3 and SW4 according to the following requirements:

Disable DTP on the six distribution ports for each switch.

Set the list of allowed vlans that can receive and send traffic on these interfaces in tagged format in particular,only allow VLAN 3,11,13,44,45.

中文注释:

1.在4台交换机上配置Trunk,并且关闭DTP信息,只允许VLAN 3,11,13,44,45从Trunk上通过。

配置:

说明:此题配置共分为1步。

1.在4台交换机上配置Trunk:

说明:共分1小步。

(1)在4台交换机上同时做如下配置: int range f0/19 - 24

switchport trunk encapsulation dot1q switchport mode trunk switchport nonegotiate

switchport trunk allowed vlan 3,11,13,44,45

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

返回目录

EIGRP

原题:

Implement IPv4 EIGRP

Configure EIGRP 100 and EIGRP YY per the IGP topology diagram. EIGRP updates should be advertise only out to the interface per the IGP topoloty diagram.

On R1,redistribute between ospf and EIGRP YY.However all of the routes that are indicated below from backbone3 (EIGRP 100)should not be redistributed between both protocols .

Use route maps to accomplish this requirement.All route-maps should utilize the same access lists.

On R3,redistribute from EIGRP 100 into OSPF.

On R3, Redistribute from EIGRP 100 into EIGRP YY.However three networks 198.2.1.0/24,198.2.3.0/24,198.2.5.0/24 should be aggregated into a single address with the most specific mask possible.

中文注释:

1.根据IGP拓朴配置EIGRP 100和EIGRP YY,并且只能在相应接口上发送更新。 2.在R1上配置OSPF与EIGRP YY的双向重分布,但是EIGRP 100的路由不允许包含在其中,使用route-map调用相同access-list做过滤。

3.在R3上将EIGRP 100重分布到OSPF。(如果没有明确说要往EIGRP 100重分布,请不要做)

4.在R3上将EIGRP 100重分布到EIGRP YY,三条路由:

198.2.1.0/24,198.2.3.0/24,198.2.5.0/24必须被汇总成一条。(如果没有明确说要往EIGRP 100重分布,请不要做)

配置:

说明:此题配置共分为4步。

1.按拓朴配置EIGRP 100和EIGRP YY:

说明:共分1小步。

(1)按拓朴配置EIGRP 100和EIGRP YY: R1:

router eigrp 2 no auto-summary

network 2.2.15.249 0.0.0.0 R3:

router eigrp 2 no auto-summary

network 2.2.15.245 0.0.0.0 exit

router eigrp 100 no auto-summary

network 150.3.2.1 0.0.0.0 exit R5:

router eigrp 2 no auto-summary network 2.2.5.5 0.0.0.0 network 2.2.15.246 0.0.0.0 network 2.2.15.250 0.0.0.0 network 2.2.15.97 0.0.0.0 SW4: router eigrp 2 no auto-summary network 2.2.10.10 0.0.0.0 network 2.2.15.98 0.0.0.0

2.在R1上配置OSPF与EIGRP YY的双向重分布:

说明:共分3小步。

(1)匹配EIGRP 100和OSPF默认路由: ip prefix-list EIGRP100 permit 4.1.1.0/24

ip prefix-list EIGRP100 permit 128.28.2.0/24 ip prefix-list EIGRP100 permit 198.2.1.0/24 ip prefix-list EIGRP100 permit 198.2.3.0/24 ip prefix-list EIGRP100 permit 198.2.5.0/24 ip prefix-list EIGRP100 permit 198.1.1.4/30 ip prefix-list EIGRP100 permit 150.3.2.0/24 access-list 1 permit 0.0.0.0

(2)配置OSPF到EIGRP YY以及EIGRP YY到OSPF的route-map: OSPF到EIGRP YY: route-map O2E deny 10

match ip address prefix-list EIGRP100 exit

route-map O2E deny 20 match ip address 1 exit

route-map E2O permit 30 exit

EIGRP YY到OSPF: route-map E2O deny 10

match ip address prefix-list EIGRP100

exit route-map E2O permit 20 exit

(3)配置OSPF与EIGRP YY的双向重分布: EIGRP YY到OSPF: router ospf 2

redistribute eigrp 2 subnets route-map E2O exit

OSPF到EIGRP YY: router eigrp 2

redistribute ospf 2 metric 10000 100 255 1 1500 route-map O2E exit

3.在R3上将EIGRP 100重分布到OSPF:

说明:共分1小步。

(1)在R3上将EIGRP 100重分布到OSPF: router ospf 2

redistribute eigrp 100 subnets exit

4.在R3上将EIGRP 100重分布到EIGRP YY:

说明:共分2小步。

(1)在R3上将EIGRP 100重分布到EIGRP YY: router eigrp 2

redistribute eigrp 100 metric 10000 100 255 1 1500 exit

(2)在R3上配EIGRP 的路由汇总: Int s0/0

ip summary-address eigrp 2 198.2.0.0 255.255.248.0 exit

返回目录

RIP V2

原题:

Implement RIP Version 2

Configure RIP version 2 (RIP v2)per the IGP topology diagram.

RIP updates should be advertise only out the interface per the IGP topology diagram.

All rip updates should be unicast.

All rip updates must be able to receive and process RIP V1 packets.

Manually redistribute between RIP and ospf on R2 and SW4,R4 learned routes should be preferred EIGRP.

中文注释

1.按照IGP拓朴配置RIP v2,并且只能在相应接口发送更新,所有RIP更新使用单播。

2.所有RIP必须能够接收ver 1数据包(当然也包含ver 2数据包)。 3.手动在R2和SW4上配置RIP与OSPF的双向重分布,R4应该优先选择EIGRP作为主路径。(此步重点,须详细考虑与配置)

配置:

说明:此题配置共分为3步。

1.按照拓朴配置RIP v2:

说明:共分1小步。

(1)按照拓朴配置RIP v2: R2: router rip version 2 no auto-summary network 2.0.0.0

passive-interface default

neighbor 2.2.15.33 exit R4: router rip version 2 no auto-summary network 2.0.0.0

passive-interface default neighbor 2.2.15.34 neighbor 2.2.15.66 exit SW4: router rip version 2 no auto-summary network 2.0.0.0

passive-interface default neighbor 2.2.15.65 exit

2.配置RIP接口接收数据包:

说明:共分1小步。

(1)配置RIP接口接收数据包: R2: Int f0/1.24

ip rip receive version 1 2 exit R4: Int f0/1

ip rip receive version 1 2 exit int f0/0

ip rip receive version 1 2 exit SW4: Int vlan 44

ip rip receive version 1 2 exit

3.配置RIP与OSPF和EIGRP YY的双向重分布:(此步为重点)

说明:共分6小步。

(1) 在R2上配置OSPF重分布进RIP时,过滤掉默认路由,并且metric值要大: access-list 2 permit 0.0.0.0 route-map O2R deny 10 match ip address 2 route-map O2R permit 20 exit

router rip

redistribute ospf 2 metric 5 route-map O2R exit

(2)R2对RIP自己的路由,从OSPF过来时,要加大AD值,保证走自己内部: access-list 22 permit 2.2.4.4 access-list 22 permit 2.2.15.64

router ospf 2

redistribute rip subnets metric-type 2 metric 30 distance 121 2.2.1.1 0.0.0.0 22

exit

说明:RIP重分布到OSPF的metric要比R1重分布EIGRP YY进OSPF的metric值

大.

(3)R2将自己的直连接口发给RIP的路由,要加大metric: Access-list 10 permit 2.2.15.240 Access-list 10 permit 2.2.15.128 Access-list 10 permit 2.2.2.2 router rip

offset-list 10 out 5 f0/1.24

(4)在SW4上将RIP重分布进EIGRP YY时的metric要比R1重分布OSPF进EIGRP YY时的metric值大: router eigrp 2

redistribute rip metric 100000 100 255 1 1500 route-map R2E exit

(5)在 SW4上将EIGRP YY重分布进RIP,metric必须比R2上OSPF重分布到RIP小: router rip

redistribute eigrp 2 metric 2 exit

(6)SW4上对于RIP过来的其它路由,不能再走RIP了,所以除RIP之外的,加大AD:

access-list 4 deny 2.2.4.4 access-list 4 deny 2.2.15.32 access-list 4 per any router rip

distance 175 2.2.15.65 0.0.0.0 4

返回目录

IPv6

原题:

Implement IPv6

Internet protocol version 6(IPv6) to configure IPv6 unique local unicast address using the EUI-64 interface identifier.

R4-G0/1 and R2-G0/1.Z (VLAN 24) FC01:DB8:74:9::/64 eui R2-S0/0.Z and R1-S0/0.Z FC01:DB8:74:A::/64 eui R1-G0/1 and SW1-SVI 11 FC01:DB8:74:B::/64 eui Configure OSPF v3 per the IPv6 topology. Ensure that R4 can ping SW1 using IPv6.

中文注释:

1.按上题所说的接口配置相应的IPv6地址,并使用EUI-64的格式填充。 2.配置OSPF v3,从R2-S0/0.Z到SW1为area 1,其它为area 0 。

配置:

说明:此题配置共分为2步。

1.在相应接口上配置IPv6地址:

说明:共分4小步。

(1)在R4的相应接口上配置IPv6地址: ipv6 unicast-routing int f0/1

ipv6 address FC01:DB8:74:9::/64 eui-64

(2)在R2的相应接口上配置IPv6地址: ipv6 unicast-routing int f0/1.24

ipv6 address FC01:DB8:74:9::/64 eui-64 exit

int s0/0.12

ipv6 address FC01:DB8:74:A::/64 eui-64

(3)在R1的相应接口上配置IPv6地址: ipv6 unicast-routing int s0/0.12

ipv6 address FC01:DB8:74:A::/64 eui-64 exit int f0/1

ipv6 address FC01:DB8:74:B::/64 eui-64 exit

(4)在SW1的相应接口上配置IPv6地址: sdm prefer dual-ipv4-and-ipv6 default exit write reload

说明:要重启交换机后,才可配置IPv6。

int vlan 11

ipv6 address FC01:DB8:74:B::/64 eui-64

2.配置OSPF v3:

说明:共分4小步。

(1)在R4上配置OSPF v3: ipv6 router ospf 2 router-id 2.2.2.2 exit int f0/1

ipv6 ospf 2 area 0

(2)在R2上配置OSPF v3: ipv6 router ospf 2 router-id 2.2.2.2 exit int f0/1.24 ipv6 ospf 2 area 0 exit int s0/0.12 ipv6 ospf 2 area 1

(3)在R1上配置OSPF v3:

ipv6 router ospf 2 router-id 2.2.2.2 exit int f0/1

ipv6 ospf 2 area 1 exit int s0/0.12 ipv6 ospf 2 area 1

(4)在SW1上配置OSPF v3: ipv6 router ospf 2 router-id 2.2.7.7 exit int vlan 11 ipv6 ospf 2 area 1

返回目录

BGP

原题:

Implement IPv4 BGP

Referring the BGP routing diagram.configure BGP with these parameters.

Configure two bgp confederations R1,R3,R5 and SW4 (AS YY1) and R2 and SW2 (AS YY2).

The confederation peers should neighbor between R1 and R2 and between SW4 and R2.

EBGP: SW2 EBGP peers with the router 150.2.Y.254 on backbone 2 in AS 254.This router advertise five routes with format 197.68.Z.0/24 and the AS_PATH 254. EBGP: R5 EBGP peers with the router 150.1.Y.254 on backbone 1 in AS 254.This router advertise five routes with format 197.68.Z.0/24 and the AS_PATH 254,253.

The bgp devices should all prefer the path through R5(150.1.Y.254) for network 197.68.21.0/24 and 197.68.22.0/24,The internal board gateway protocol(IBGP)devices should all prefer the path through SW2(150.2.Y.254) for network 197.68.1.0/24,197.68.4.0/24 and 197.68.5.0/24,this

manipulation should be accomplished only on one router using route-maps that refer to a single access-list.

Configure only the loopback 0 ip address to propagate BGP route information. BGP routes should be advertised to AS 254.

中文注释:

1.配置两个BGP confederations(联盟),使用loopback0更新;R1,R3,R5和SW4在AS YY1;R2和SW2在AS YY2。联盟之间R1与R2,SW2与R2建立邻居关系,SW2和SW4将自己的loopback0发布进BGP。(AS YY1中,R5为反射器)

2.SW2和BB2建立EBGP邻居,对方发来的路由为197.68.Z.0/24 and the AS_PATH 254;

R5和BB1建立EBGP邻居,对方发来的路由为197.68.Z.0/24 and the AS_PATH 254,253。

3.配置所有BGP选择从R5到达197.68.21.0/24 and 197.68.22.0/24;所有IBGP选择从SW2到达197.68.1.0/24,197.68.4.0/24 and 197.68.5.0/24,须在单台设备上通过route-map调用单和ACL实现。

配置:

说明:此题配置共分为3步。

1.配置BGP邻居:

说明:共分1小步。

(1)在R1,R2,R3,R5,SW2和SW4上配置BGP: R1: router bgp 21 no auto-summary no synchronization bgp router-id 2.2.1.1 bgp confederation identifier 2 bgp confederation peers 22 neighbor 2.2.2.2 remote-as 22

neighbor 2.2.2.2 update-source loopback 0 neighbor 2.2.2.2 ebgp-multihop neighbor 2.2.5.5 remote-as 21

neighbor 2.2.5.5 update-source loopback 0

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