CISCO路由器配置完全手册(二)

文章作者 100test 发表时间 2007:03:14 13:19:48
来源 100Test.Com百考试题网

一、HDLC

　　HDLC是CISCO路由器使用的缺省协议，一台新路由器在未指定封装协议时默认使用HDLC封装。

　　1. 有关命令

　　端口设置

任务	命令
设置HDLC封装	encapsulation hdlc
设置DCE端线路速度	clockrate speed
复位一个硬件接口	clear interface serial unit
显示接口状态	show interfaces serial [unit] 1

　　注:1.以下给出一个显示Cisco同步串口状态的例子.

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 0drops. input queue 0/75, 0 0drops 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

　　2. 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 !

　　3. 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