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Router1(config-if)#service-module t1 linecode ami
Router1(config-if)#service-module t1 data-coding inverted
Router1(config-if)#service-module t1 framing sf
Router1(config-if)#service-module t1 fdl ansi
Router1(config-if)#service-module t1 fdl att
Router1(config-if)#service-module t1 remote-alarm-enable
通常运营商会提供时钟,如果在实验网络需要其成为DCE需要配置service-module t1 clock source internal 来提供时钟
16.4. 使用内置ISDN PRI 模块
提问 配置内置ISDN PRI 模块
回答
Router8#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router8(config)#isdn switch-type primary-dms100
Router8(config)#controller T1 0
Router8(config-controlle)#framing esf
Router8(config-controlle)#clock source line primary
Router8(config-controlle)#linecode b8zs
Router8(config-controlle)#pri-group timeslots 1-24
Router8(config-controlle)#exit
Router8(config)#end
Router8#
注释 无
16.5. 使用内置56 Kbps CSU/DSU
提问 配置内置56 Kbps CSU/DSU
回答
Router2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router2(config)#interface Serial0/1
Router2(config-if)#ip address 192.168.99.25 255.255.255.252
Router2(config-if)#no shutdown
Router2(config-if)#service-module 56k clock rate 9.6
Router2(config-if)#exit
Router2(config)#end
Router2#
注释 这种模块没有见过,有点晕,先略一下
16.6. 配置异步串行接口
提问 配置一个同步/异步串行接口工作于异步模式
回答
Router3#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router3(config)#interface Serial1/7
Router3(config-if)#physical-layer async
Router3(config-if)#encapsulation ppp
Router3(config-if)#exit
Router3(config)#line 40
Router3(config-line)#speed 115200
Router3(config-line)#exit
Router3(config)#end
Router3#
注释 在配置了physical-layer async命令以后需要查看line号
Router3#show line
Tty Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int
0 CTY - - - - - 0 0 0/0 -
40 TTY 9600/9600 - - - - - 0 0 0/0 Se1/7
65 AUX 2400/2400 F - - - - 0 0 0/0 -
看到Se1/7为line 40,同时其速率变为9600,所以需要使用speed命令来修改速率
16.7. 配置ATM子接口
提问 基于PVC得ATM链路互联
回答
老方法
Router2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router2(config)#interface ATM0/0
Router2(config-if)#no ip address
Router2(config-if)#exit
Router2(config)#interface ATM0/0.1 point-to-point
Router2(config-subif)#description PVC to New York
Router2(config-subif)#ip address 192.168.250.146 255.255.255.252
Router2(config-subif)#atm pvc 1 0 60 aal5snap 10000 5000 3 oam 5
Router2(config-subif)#exit
Router2(config)#end
Router2#
11.3以后使用思科特性周期性发送ATM OAM信元来测试VC
Router2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router2(config)#interface ATM0/0
Router2(config-if)#no ip address
Router2(config-if)#exit
Router2(config)#interface ATM0/0.1 point-to-point
Router2(config-subif)#description PVC to New York
Router2(config-subif)#ip address 192.168.250.146 255.255.255.252
Router2(config-subif)#pvc 0/60
Router2(config-if-atm-vc)#vbr-nrt 10000 5000 30
Router2(config-if-atm-vc)#oam-pvc manage 5
Router2(config-if-atm-vc)#exit
Router2(config)#end
Router2#
注释 第一种方法验证Router2#show atm pvc 0/60
ATM0/0.1: VCD: 1, VPI: 0, VCI: 60, etype:0x0, AAL5 - LLC/SNAP, Flags: 0x830
PeakRate: 10000, Average Rate: 5000, Burst Cells: 96, VCmode: 0xE000
OAM frequency: 5 second(s), InARP frequency: 15 minute(s)
InPkts: 1292959637, OutPkts: 3327374998, InBytes: 2196038015, OutBytes: 813592646
InPRoc: 19959239, OutPRoc: 24660, Broadcasts: 19481389
InFast: 1212924649, OutFast: 3297025318, InAS: 60075750, OutAS: 10843631
OAM F5 cells sent: 6804133, OAM cells received: 6740056
Status: ACTIVE
VCD是本地有效,VPI VCI必须和对端相同,至于封装协议推荐是AAL5SNAP,如果需要支持PPP则改为AAL5CISCOPPP
在新方法里面已经没有配置VCD了,并且如果3个OAM信元没有收到就会标记此接口断掉,在12.2(4)T后还引入了Router2(config)#snmp-server enable traps atm pvc extension oam failure loopback 来支持SNMP告警 |
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