Router#show interface serial 0 Serial 0 is up, line protocol is up Hardware is MCI Serial Internet address is 150.136.190.203, subnet mask is 255.255.255.0 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255 Encapsulation HDLC, loopback not set, keepalive set (10 sec) Last input 0:00:07, output 0:00:00, output hang never Output queue 0/40, 0 drops; input queue 0/75, 0 drops Five minute input rate 0 bits/sec, 0 packets/sec Five minute output rate 0 bits/sec, 0 packets/sec 16263 packets input, 1347238 bytes, 0 no buffer Received 13983 broadcasts, 0 runts, 0 giants 2 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 2 abort 22146 packets output, 2383680 bytes, 0 underruns 0 output errors, 0 collisions, 2 interface resets, 0 restarts 1 carrier transitions B. 举例: 设置如下: Router1:
interface Serial0 ip address 192.200.10.1 255.255.255.0 clockrate 1000000 Router2:
interface Serial0 ip address 192.200.10.2 255.255.255.0 ! C. 举例使用E1线路实现多个64K专线连接. 相关命令: 任务 命令 进入controller配置模式 controller {t1 e1} number 选择帧类型 framing {crc4 no-crc4} 选择line-code类型 linecode {ami b8zs hdb3} 建立逻辑通道组与时隙的映射 channel-group number timeslots range1 显示controllers接口状态 show controllers e1 [slot/port]2 注: 1. 当链路为T1时,channel-group编号为0-23, Timeslot范围1-24; 当链路为E1时, channel-group编号为0-30, Timeslot范围1-31. 2.使用show controllers e1观察controller状态,以下为帧类型为crc4时controllers正常的状态. Router# show controllers e1 e1 0/0 is up. Applique type is Channelized E1 - unbalanced Framing is CRC4, Line Code is HDB3 No alarms detected. Data in current interval (725 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs Total Data (last 24 hours) 0 Line Code Violations, 0 Path Code Violations, 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins, 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs 以下例子为E1连接3条64K专线, 帧类型为NO-CRC4,非平衡链路,路由器具体设置如下:
shanxi#wri t Building configuration... Current configuration: ! version 11.2 no service udp-small-servers no service tcp-small-servers ! hostname shanxi ! enable secret 5 $1$XN08$Ttr8nfLoP9.2RgZhcBzkk/ enable passWord shanxi ! ! ip subnet-zero ! controller E1 0 framing NO-CRC4 channel-group 0 timeslots 1 channel-group 1 timeslots 2 channel-group 2 timeslots 3 ! interface Ethernet0 ip address 133.118.40.1 255.255.0.0 media-type 10BaseT ! interface Ethernet1 no ip address shutdown ! interface Serial0:0 ip address 202.119.96.1 255.255.255.252 no ip mroute-cache ! interface Serial0:1 ip address 202.119.96.5 255.255.255.252 no ip mroute-cache ! interface Serial0:2 ip address 202.119.96.9 255.255.255.252 no ip mroute-cache ! no ip classless ip route 133.210.40.0 255.255.255.0 Serial0:0 ip route 133.210.41.0 255.255.255.0 Serial0:1 ip route 133.210.42.0 255.255.255.0 Serial0:2 ! line con 0 line aux 0 line vty 0 4 password shanxi login ! end 6、配置PPP: PPP(Point-to-Point Protocol)是SLIP(Serial Line IP protocol)的继续者,它提供了跨过同步和异步电路实现路由器到路由器(router-to-router)和主机到网络(host-to-network)的连接。
interface serial 0 encapsulation frame-relay interface s 0.1 multipoint ip address 11.10.11.1 255.255.255.0 frame-relay interface-dlci 41 frame-relay interface-dlci 42
Configuration for RouterC:
interface serial 0 encapsulation frame-relay interface s 0.1 point-to-point ip address 11.10.16.2 255.255.255.0 frame-relay interface-dlci 46
Configuration for RouterB:
interface serial 0 encapsulation frame-relay interface s 0.1 multipoint ip address 11.10.11.3 255.255.255.0 frame-relay interface-dlci 43 frame-relay interface-dlci 44 ! interface s 0.2 point-to-point ip address 11.10.13.1 255.255.255.0 frame-relay interface-dlci 48
Frame Relay Switching Example
Configuration for RouterA:
frame-relay switching ! int s 0 no ip address frame-relay encapsulation frame-relay route 167 tun0 43 frame-relay intf-type dce ! int s 1 ip address 131.108.100.1 255.255.255.0 ! int tu 0 tunnel source serial 1 tunnel destination 131.108.13.2
Configuration for RouterB:
frame-relay switching ! int s 0 no ip address frame-relay encapsulation frame-relay route 9 tun0 43 frame-relay intf-type dce ! int s 1 ip address 131.108.13.2 255.255.255.0 ! int tu 0 tunnel source serial 1 tunnel destination 131.108.100.1
Channelized E1 Interface Example
假设是7500系列路由器,E1接口(MIP板)在插槽4上面.一个channel-group可对应多个时间槽,本例中serial4/0:1有5*64Kbps的数率. Configuration for Router:
interface ethernet 0 ip address 192.1.0.65 255.255.255.192 ! interface serial 0 ip address 192.200.10.6 255.255.255.252 ! router ospf 200 network 192.200.10.4 0.0.0.3 area 0 network 192.1.0.64 0.0.0.63 area 2 ! Router3:
interface ethernet 0 ip address 192.1.0.130 255.255.255.192 ! router ospf 300 network 192.1.0.128 0.0.0.63 area 1 ! Router4:
interface ethernet 0 ip address 192.1.0.66 255.255.255.192 ! router ospf 400 network 192.1.0.64 0.0.0.63 area 1 ! 相关调试命令: debug ip ospf events debug ip ospf packet show ip ospf show ip ospf database show ip ospf interface show ip ospf neighbor show ip route 3. 使用身份验证 为了安全的原因,我们可以在相同OSPF区域的路由器上启用身份验证的功能,只有经过身份验证的同一区域的路由器才能互相通告路由信息。 在默认情况下OSPF不使用区域验证。通过两种方法可启用身份验证功能,纯文本身份验证和消息摘要(md5)身份验证。纯文本身份验证传送的身份验证口令为纯文本,它会被网络探测器确定,所以不安全,不建议使用。而消息摘要(md5)身份验证在传输身份验证口令前,要对口令进行加密,所以一般建议使用此种方法进行身份验证。 使用身份验证时,区域内所有的路由器接口必须使用相同的身份验证方法。为起用身份验证,必须在路由器接口配置模式下,为区域的每个路由器接口配置口令。 任务 命令 指定身份验证 area area-id authentication [message-digest] 使用纯文本身份验证 ip ospf authentication-key password 使用消息摘要(md5)身份验证 ip ospf message-digest-key keyid md5 key 以下列举两种验证设置的示例,示例的网络分布及地址分配环境与以上基本配置举例相同,只是在Router1和Router2的区域0上使用了身份验证的功能。: 1.使用纯文本身份验证 Router1:
interface ethernet 0 ip address 192.1.0.129 255.255.255.192 ! interface serial 0 ip address 192.200.10.5 255.255.255.252 ip ospf authentication-key cisco ! router ospf 100 network 192.200.10.4 0.0.0.3 area 0 network 192.1.0.128 0.0.0.63 area 1 area 0 authentication ! Router2:
interface ethernet 0 ip address 192.1.0.65 255.255.255.192 ! interface serial 0 ip address 192.200.10.6 255.255.255.252 ip ospf authentication-key cisco ! router ospf 200 network 192.200.10.4 0.0.0.3 area 0 network 192.1.0.64 0.0.0.63 area 2 area 0 authentication ! 例2.消息摘要(md5)身份验证: Router1:
interface ethernet 0 ip address 192.1.0.129 255.255.255.192 ! interface serial 0 ip address 192.200.10.5 255.255.255.252 ip ospf message-digest-key 1 md5 cisco ! router ospf 100 network 192.200.10.4 0.0.0.3 area 0 network 192.1.0.128 0.0.0.63 area 1 area 0 authentication message-digest ! Router2:
interface ethernet 0 ip address 192.1.0.65 255.255.255.192 ! interface serial 0 ip address 192.200.10.6 255.255.255.252 ip ospf message-digest-key 1 md5 cisco ! router ospf 200 network 192.200.10.4 0.0.0.3 area 0 network 192.1.0.64 0.0.0.63 area 2 area 0 authentication message-digest ! 相关调试命令: debug ip ospf adj debug ip ospf events