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DDN经典实例

www.gzicp.com   2004年6月8日 23:58:44
 
  DDN设置                                                                   
  DDN(Digital Data Net
SDLC等链路层通信协议.允
协议在上面运行.
work)是一种点对点的同步数据
许IP,Novell IPX, Bridging,CL

通信链路.它支持PPP,SLIP,HDLC和
NS,AppleTalk,DECnet等多种上层

  基本配置                                                                     
  压缩技术                                                                     
  E1端口配置                                                                 
  基本配置                                                                     
  功 能 命 令                                                               
  进入指定端口 interface serial number                 
  定义该端口IP地址 ip address ip-address mask     
  指定该端口打包方式 encapsulation {PPP|HDLC }       
  压缩技术                                                                     
  通常在串口中传输的数
浪费带宽.目前支持的压缩
据是不压缩的,它允许数据包头
有PPP,FrameRelay, X.25, TCP
在每次传输时正常交换,但每次将
等等.
  Cisco的压缩是通过软
使用压缩.(showprocess cp
件完成的,将影响系统性能.故建
u EXEC命令查看当前CPU使用情
议路由器CPU占用超过65%,就不要
况)
  功 能 命 令                                                               
  TCP传输头压缩 ip tcp head-compre
ssion [passive]
  X.25压缩 X25 compress                                       
  PPP压缩 ppp compress [predictir|stac]       
  注:"passive"表示只有输入包是压缩时,输出包才压缩.                 
  E1端口配置                                                                 
  在Cisco 4500,4700,7000和7500系列
可以按时隙分成30路64K数据线路和2路信
64K的专线.
里面均支持E1(2.048Mbps)数率的接口.每一个E1端口
号线路.这30个64K数据线路每一路均可以当作一条

  功 能 命 令                                                               
  在配置模式下,定义Con
troller E1 controller e1 slo
t/port
  定义line code linecode {ami |hdb3}             
  定义字符帧 framing {crc4 |no-crc4}                   
  定义E1组 channel-group numbertim
eslots range [speed{48| 56|64}]
  指定串口属于那一个ch
annel-group组 interface seri
al
  slot/port:channel-group                               
  注:                                                                         
  slot/port----是针对7
000或7500系列的,故区分槽口号
和端口号.
  linecode----默认是HDB3.                                     
  framing----默认是crc4,要与电信局参数匹配.                   
  channel-group----每
起来.channel-group是0-30
个E1可以分成30个channel-grou
,timeslots是1-31.
p,把channel-group和时间槽对应

  interface serial----在定义完E1 c
hannel-group后,我们把group赋予成一个虚拟串口
  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 controlle
r {t1 | e1} number
  选择帧类型 framing {crc4 | no-crc4}                 

  选择line-code类型 li
necode {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 con
trollers e1 [slot/port]2

  注: 1. 当链路为T1时,
channel-group编号为0-30,
channel-group编号为0-23, Tim
Timeslot范围1-31.
eslot范围1-24; 当链路为E1时,

  2.使用show controlle
常的状态.
rs e1观察controller状态,以下

为帧类型为crc4时controllers正


  Router# show controllers e1                       
  e1 0/0 is up.                                                   
  Applique type is Channelized E1
- unbalanced
  Framing is CRC4, Lin
e Code is HDB3 No alarms det
ected.
  Data in current interval (725 se
conds elapsed):

  0 Line Code Violatio
ns, 0 Path Code Violations
  0 Slip Secs, 0 Fr Lo
ss Secs, 0 Line Err Secs, 0
Degraded Mins
  0 Errored Secs, 0 Bursty Err Sec
s, 0 Severely Err Secs, 0 Unavail Secs
  Total Data (last 24
hours) 0 Line Code Violation
s, 0 Path Code Violations,
  0 Slip Secs, 0 Fr Loss Secs, 0 L
ine Err Secs, 0 Degraded Mins,
  0 Errored Secs, 0 Bursty Err Sec
s, 0 Severely Err Secs, 0 Unavail Secs

  以下例子为E1连接3条6
4K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 $X
N08$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 YYY.118.40.1 255.255.0.0       
  media-type 10BaseT                                         
  !                                                                           
  interface Ethernet1                                       
  no ip address                                                   
  shutdown                                                             
  !                                                                           
  interface Serial0:0                                       
  ip address TTT.119.96.1 255.255.
255.252
  no ip mroute-cache                                         
  !                                                                           
  interface Serial0:1                                       
  ip address TTT.119.96.5 255.255.
255.252
  no ip mroute-cache                                         
  !                                                                           
  interface Serial0:2                                       

  ip address TTT.119.9
6.9 255.255.255.252
  no ip mroute-cache                                         
  !                                                                           
  no ip classless                                               

  ip route YYY.210.40.
0 255.255.255.0 Serial0:0

  ip route YYY.210.41.
0 255.255.255.0 Serial0:1

  ip route YYY.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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