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掌握和设置 T1 背对背连接的从属关系

2016 年 10 月 25 日 - 机器翻译
其他版本: PDFpdf | 英语 (2015 年 8 月 22 日) | 反馈


目录


简介

本文档提供连接和测试含两个背对背 Cisco 3640 路由器的 T1 连接的示例配置。

在此示例配置中,我们配置了 Cisco 路由器,将含时钟源的 j3640-1 设置为内部。这表示服务提供商或电话公司 (telco) 不提供时钟,因此 T1 需要在内部获取时钟,并且在这种情况下是“主设备”。我们还需要配置直接连接至此 T1 的所有其他设备,以便从主设备(Cisco 路由器 asj3640-1)获取时钟并作为“从属设备”运行。在我们的设置中,从属设备是 Cisco 路由器 asj3640-2。

先决条件

要求

本文档没有任何特定的要求。

使用的组件

本文档中的信息基于以下软件和硬件版本:

  • Cisco IOSï ¿ Â在asj3640-1的½软件版本11.3(10)T。我们在这里使用 NM-1CT1-CSU 网络模块。

  • asj3640-2 上的 Cisco IOS 软件版本 12.2(1)。我们在这里使用 NM-2CT1-CSU 网络模块。

本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始(默认)配置。如果您使用的是真实网络,请确保您已经了解所有命令的潜在影响。

规则

有关文档规则的详细信息,请参阅 Cisco 技术提示规则

背景信息

计时

计时是 T1 网络中的一个重要功能。计时是指 T1 载波的定时和同步。定时在传输的数据信号内编码,并用于确保网络中的同步。在典型情况下,T1 的一端提供主时钟,另一端是主时钟的从属设备。

配置

本部分提供有关如何配置本文档所述功能的信息。

注意: 要查找本文档所用命令的其他信息,请使用命令查找工具仅限注册用户)。

网络图

本文档使用以下网络设置:

图1 – 网络图

t1_back_to_back.gif

配置

本文档使用以下配置:

  • asj3640-1

  • asj3640-2

asj3640-1
asj3640-1#show running-config
Building configuration...
Current configuration:
!
version 11.3
!
hostname asj3640-1
!
!
controller T1 1/0
 framing esf
 clock source internal
 linecode b8zs
 channel-group 1 timeslots 1 speed 64
!
!
interface Serial1/0:1
 ip address 10.10.10.1 255.255.255.192
 encapsulation ppp
!
interface Ethernet2/0
 ip address 171.68.186.116 255.255.255.240
!
!
line con 0
 transport input none
line aux 0
line vty 0 4
 exec-timeout 60 0
 login
!
end

asj3640-2
asj3640-2#show running-config
Building configuration...
!
version 12.2
!
hostname asj3640-2
!
!
controller T1 1/0
 framing esf
 linecode b8zs
 channel-group 1 timeslots 1 speed 64
!
controller T1 1/1
 shutdown
!
interface Serial1/0:1
 ip address 10.10.10.2 255.255.255.192
 encapsulation ppp
!
interface Ethernet2/0
 ip address 171.68.186.117 255.255.255.240
!
!
line con 0
 transport input none
line 1 18
line aux 0
line vty 0 4
 login
!
end

验证

本部分所提供的信息可用于确认您的配置是否正常工作。

命令输出解释程序工具仅限注册用户)支持某些 show 命令,使用此工具可以查看对 show 命令输出的分析。

  • show interfaces serial — 显示关于串行接口的信息。

  • show controllers — 显示关于物理端口设备的信息。

  • show diag — 显示环境统计信息和开机诊断状态。

此处是在图 1 中显示的设备上输入的这些命令的输出。此输出显示网络运行正确。

在路由器 asj3640-1 上

asj3640-1#show interfaces serial 1/0:1
Serial1/0:1 is up, line protocol is up
  Hardware is DSX1
  Internet address is 10.10.10.1/26
  MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, loopback not set, keepalive set (10 sec)
  LCP Open
  Open: IPCP, CDPCP
  Last input 00:00:02, output 00:00:02, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/2 (size/max/drops); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/1/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     56408 packets input, 3194092 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     52431 packets output, 1988028 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
  Timeslot(s) Used:1, Transmitter delay is 0 flags

asj3640-1#show controllers t1
T1 1/0 is up.
  T1 with CSU interface.
  Cable Length is LONG, Rcv gain is 36 db and Tx gain is 0 db.
  No alarms detected.
  Framing is ESF, Line Code is B8ZS, Clock Source is Internal.
  Data in current interval (765 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

asj3640-1#show diag
Slot 1:
        CT1 (CSU) port adapter, 1 port
        Port adapter is analyzed
        Port adapter insertion time unknown
        Hardware revision 1.1           Board revision A0
        Serial number     5706080       Part number    800-01228-03
        Test history      0x0           RMA number     00-00-00
        EEPROM format version 1
        EEPROM contents (hex):
          0x20: 01 26 01 01 00 57 11 60 50 04 CC 03 00 00 00 00
          0x30: 50 00 00 00 97 10 11 17 FF FF FF FF FF FF FF FF

在路由器 asj3640-2 上

asj3640-2#show interfaces serial 1/0:1
Serial1/0:1 is up, line protocol is up
  Hardware is DSX1
  Internet address is 10.10.10.2/26
  MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, loopback not set
  Keepalive set (10 sec)
  LCP Open
  Open: IPCP, CDPCP
  Last input 00:00:03, output 04:23:19, output hang never
  Last clearing of "show interface" counters 1d20h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 8
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/1/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 48 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     34363 packets input, 1305984 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     37049 packets output, 2090260 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
  Timeslot(s) Used:1, Transmitter delay is 0 flags

asj3640-2#show controllers t1
T1 1/0 is up.
  Applique type is Channelized T1
  Cablelength is long gain36 0db
  No alarms detected.
  alarm-trigger is not set
  Framing is ESF, Line Code is B8ZS, Clock Source is Line.
  Data in current interval (557 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, 1 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
     0 Errored Secs, 0 Bursty Err Secs, 1 Severely Err Secs, 0 Unavail Secs

asj3640-2#show diag
Slot 1:
        CT1 (CSU) Port adapter, 2 ports
        Port adapter is analyzed
        Port adapter insertion time unknown
        EEPROM contents at hardware discovery:
        Hardware revision 1.1           Board revision B0
        Serial number     16809907      Part number    800-01229-04
        Test history      0x0           RMA number     00-00-00
        EEPROM format version 1
        EEPROM contents (hex):
          0x20: 01 27 01 01 01 00 7F B3 50 04 CD 04 00 00 00 00
          0x30: 58 00 00 00 99 11 02 00 FF FF FF FF FF FF FF FF

故障排除

目前没有针对此配置的故障排除信息。


相关信息


Document ID: 9333