Cisco 4500配备了一块快速同步卡，为E1/G.703标准，可以直接接中继线，但是它不是那种信道化的标准。配置只要按以下步骤： gy-4500-01#config ter Enter configuration commands, one per line. End with CNTL/Z. gy-4500-01(config)#int s0 gy-4500-01(config-if)#no shutdown gy-4500-01(config-if)#ip add 202.98.196.69 255.255.255.252 gy-4500-01(config-if)#timeslot 1-31 gy-4500-01(config-if)#ts16 gy-4500-01(config-if)#end gy-4500-01#write 按照以上的基本上可以完成配置，可以视情况加上以下参数： gy-4500-01#conf ter Enter configuration commands, one per line. End with CNTL/Z. gy-4500-01(config)#int s0 gy-4500-01(config-if)#bandwidth 2048 ；将带宽设为2M gy-4500-01(config-if)#clock source line ; 时钟源来自中继线 gy-4500-01(config-if)#end gy-4500-01#write
MIP的设置 Cisco 7513配备了一块MIP板，它的全称为Multi-channel Interface PRocessor，同样为E1/G.703标准，顾名思义，它支持信道化的E1。 下面简要说一下它的配置步骤： 首先执行以下命令应该可以见到以下类似信息： gy-7513-01#show controller e1 E1 4/0 is down. Applique type is Channelized E1 - unbalanced Transmitter is sending remote alarm. Receiver has loss of signal. Framing is CRC4, Line Code is HDB3, Clock Source is Line. Data in current interval (335 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 1 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 335 Unavail Secs E1 4/1 is down. Applique type is Channelized E1 - unbalanced Transmitter is sending remote alarm. Receiver has loss of signal. Framing is CRC4, Line Code is HDB3, Clock Source is Line. Data in current interval (340 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 1 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 340 Unavail Secs 在按照以下步骤配置： gy-7513-01#conf ter Enter configuration commands, one per line. End with CNTL/Z. gy-7513-01(config)#controller e1 4/0 gy-7513-01(config-controller)#channel-group 1 timeslot 1-2 gy-7513-01(config-controller)#end gy-7513-01# 现在就相当于把第1，2个时隙映射成一个同步口，它的速率为2*64k=128k，用 show run的命令可以见到以下信息： gy-7513-01#sh run Building configuration...
Current configuration: ! version 11.2 ! hostname gy-7513-01 ! enable secret 5 $1$I8En$2vVrbsGngBedjDsJb6SRc0 enable passWord guiyang ! ip subnet-zero x25 routing ! controller E1 4/0 channel-group 1 timeslots 1-2 ! controller E1 4/1 ! interface Serial4/0:1 no ip address no ip mroute-cache ! 这时，就可以将serial4/0:1当一个标准的同步口来配置
X.25接入的配置 Cisco的路由器支持X.25的接入，包括终端接入方式，点对点接入，多对点接入。 终端接入 gy-7513-01#conf ter Enter configuration commands, one per line. End with CNTL/Z. gy-7513-01(config)#int s8/0 gy-7513-01(config-if)#no shutdown gy-7513-01(config-if)#no ip add gy-7513-01(config-if)#encapsulation x25 gy-7513-01(config-if)#bandwidth 64 gy-7513-01(config-if)#x25 add 78905678 gy-7513-01(config-if)#x25 htc 16 gy-7513-01(config-if)#x25 idle 8 gy-7513-01(config-if)#x25 nvc 8 gy-7513-01(config-if)#exit gy-7513-01(config)#translate x25 78905678 tcp 202.98.196.9 gy-7513-01(config)#exit gy-7513-01# 以上78905678为X.25端口的地址，而202.98.196.1为要直接登录的主机的地址 还可以视是否接DTU加入以下参数： gy-7513-01#conf ter Enter configuration commands, one per line. End with CNTL/Z. gy-7513-01(config)#int s8/0 gy-7513-01(config-if)#clock rate 64000 gy-7513-01(config-if)#end gy-7513-01# 这样用户用X.25拨号接通X.25的这个端口后，就可以直接登录到主机上 点对点的接入 两个路由器之间可以用X.25网相连，只要按以下步骤配置即可： 路由器A的配置： gy-7513-01#conf ter Enter configuration commands, one per line. End with CNTL/Z. gy-7513-01(config)#int s8/0 gy-7513-01(config-if)#ip add 202.98.196.65 255.255.255.224 gy-7513-01(config-if)#encapsulation x25 gy-7513-01(config-if)#x25 add 12345678 gy-7513-01(config-if)#bandwidth 64 gy-7513-01(config-if)#x25 htc 16 gy-7513-01(config-if)#x25 idle 5 gy-7513-01(config-if)#x25 nvc 8 gy-7513-01(config-if)#x25 map ip 202.98.196.66 23456789 broadcast gy-7513-01(config-if)#x25 map ip 202.98.196.65 12345678 broadcast gy-7513-01(config-if)#end gy-7513-01# 以上12345678为本路由器所接的X.25的端口号，而23456789为对端路由器所接的X.25的端口号 还可以视是否接DTU加入以下参数： gy-7513-01#conf ter Enter configuration commands, one per line. End with CNTL/Z. gy-7513-01(config)#int s8/0 gy-7513-01(config-if)#clock rate 64000 gy-7513-01(config-if)#end gy-7513-01# 路由器B的配置 gy-2511-01#conf ter Enter configuration commands, one per line. End with CNTL/Z. gy-2511-01(config)#int s0 gy-2511-01(config-if)#ip add 202.98.196.66 255.255.255.224 gy-2511-01(config-if)#encapsulation x25 gy-2511-01(config-if)#x25 add 23456789 gy-2511-01(config-if)#bandwidth 64 gy-2511-01(config-if)#x25 htc 16 gy-2511-01(config-if)#x25 idle 5 gy-2511-01(config-if)#x25 nvc 8 gy-2511-01(config-if)#x25 map ip 202.98.196.66 23456789 broadcast gy-2511-01(config-if)#x25 map ip 202.98.196.65 12345678 broadcast gy-2511-01(config-if)#end gy-2511-01# 以上12345678为本路由器所接的X.25的端口号，而23456789为对端路由器所接的X.25的端口号 还可以视是否接DTU加入以下参数： gy-2511-01#conf ter Enter configuration commands, one per line. End with CNTL/Z. gy-2511-01(config)#int s0 gy-2511-01(config-if)#clock rate 64000 gy-2511-01(config-if)#end gy-2511-01# 多对点的接入 X.25接入的优胜之处就在于支持多对点的接入，多对点的接入路由器的设置跟点对点的设置是完全一样的。
