广域网协议设置一、HDLC

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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 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

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

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