配置部分PVC网状网络完全连接及帧中继映射(详细配置)

实验：配置部分PVC网状网络完全连接及帧中继映射，我所使用的Router是3640!

实验拓扑图，如下：

实验连线：

R1 S0/0 <----> R4 S0/0

R2 S0/1 <----> R4 S0/1

Rr3 S0/2 <----> R4 S0/2

实验IP地址表：

R1 S0/0 192.1.1.1/24

R2 S0/1 192.1.1.3/24

R3 S0/2 192.1.1.4/24

具体情况如下：

R1:

Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R1
R1(config)#int s0/0
R1(config-if)#ip address 192.1.1.1 255.255.255.0    //给接口赋予IP地址
R1(config-if)#encapsulation frame-relay     //封装成帧中继CISCO模式
R1(config-if)#frame-relay lmi-type ansi     //LMI信令类型为ANSI D附件
R1(config-if)#no shut         //开启接口
R1(config-if)#end
R1#

R2:

Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R2
R2(config)#int s0/1
R2(config-if)#ip address 192.1.1.3 255.255.255.0
R2(config-if)#encapsulation frame-relay
R2(config-if)#frame-relay lmi-type ansi
R2(config-if)#no shut
R2(config-if)#end
R2#

R3:

Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R3
R3(config)#int s0/2
R3(config-if)#ip address 192.1.1.4 255.255.255.0
R3(config-if)#encapsulation frame-relay
R3(config-if)#frame-relay lmi-type ansi
R3(config-if)#no shut
R3(config-if)#end
R3#

FrameSwitch:

Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname FrameSwitch
FrameSwitch(config)#frame-relay switching //配置Router具备帧中继交换机功能
FrameSwitch(config)#int s0/0
FrameSwitch(config-if)#clock rate 64000   //提供64000bps时钟
FrameSwitch(config-if)#encapsulation frame-relay
FrameSwitch(config-if)#frame-relay lmi-type ansi
FrameSwitch(config-if)#frame-relay intf-type dce   //设置接口类型为DCE
FrameSwitch(config-if)#frame-relay route 200 int s0/1 200   //定义一条PVC,在S0/0和S0/1之间。
FrameSwitch(config-if)#frame-relay route 201 int s0/2 201
FrameSwitch(config-if)#no shut
FrameSwitch(config-if)#exit
FrameSwitch(config)#int s0/1
FrameSwitch(config-if)#clock rate 64000
FrameSwitch(config-if)#encapsulation frame-relay
FrameSwitch(config-if)#frame-relay lmi-type ansi
FrameSwitch(config-if)#frame-relay intf-type dce
FrameSwitch(config-if)#frame-relay route 200 int s0/0 200
FrameSwitch(config-if)#no shut
FrameSwitch(config-if)#exit
FrameSwitch(config)#int s0/2
FrameSwitch(config-if)#clock rate 64000
FrameSwitch(config-if)#encapsulation frame-relay
FrameSwitch(config-if)#frame-relay lmi-type ansi
FrameSwitch(config-if)#frame-relay intf-type dce
FrameSwitch(config-if)#frame-relay route 201 int s0/0 201
FrameSwitch(config-if)#no shut
FrameSwitch(config-if)#end
FrameSwitch#

以上为基本配置，下面我们先来验证上面的配置产生的结果：

FrameSwitch#show frame pvc

PVC Statistics for interface Serial0/0 (Frame Relay DCE)

              Active     Inactive      Deleted       Static
Local          0            0            0            0
Switched       2            0            0            0
Unused         0            0            0            0

DLCI = 200, DLCI USAGE = SWITCHED, PVC STATUS = ACTIVE, INTERFACE = Serial0/0

input pkts 1             output pkts 1            in bytes 34
out bytes 34             dropped pkts 0           in FECN pkts 0
in BECN pkts 0           out FECN pkts 0          out BECN pkts 0
in DE pkts 0             out DE pkts 0
out bcast pkts 0         out bcast bytes 0
switched pkts 1            //显示Pkt交换的数目

Detailed packet drop counters:
no out intf 0            out intf down 0          no out PVC 0
in PVC down 0            out PVC down 0           pkt too big 0
shaping Q full 0         pkt above DE 0           policing drop 0
pvc create time 00:05:29, last time pvc status changed 00:03:40

DLCI = 201, DLCI USAGE = SWITCHED, PVC STATUS = ACTIVE, INTERFACE = Serial0/0

input pkts 1             output pkts 1            in bytes 34
out bytes 34             dropped pkts 0           in FECN pkts 0
in BECN pkts 0           out FECN pkts 0          out BECN pkts 0
in DE pkts 0             out DE pkts 0
out bcast pkts 0         out bcast bytes 0
switched pkts 1
Detailed packet drop counters:
no out intf 0            out intf down 0          no out PVC 0
in PVC down 0            out PVC down 0           pkt too big 0
shaping Q full 0         pkt above DE 0           policing drop 0
pvc create time 00:05:06, last time pvc status changed 00:01:41

PVC Statistics for interface Serial0/1 (Frame Relay DCE)

              Active     Inactive      Deleted       Static
Local          0            0            0            0
Switched       1            0            0            0
Unused         0            0            0            0

DLCI = 200, DLCI USAGE = SWITCHED, PVC STATUS = ACTIVE, INTERFACE = Serial0/1

input pkts 1             output pkts 1            in bytes 34
out bytes 34             dropped pkts 0           in FECN pkts 0
in BECN pkts 0           out FECN pkts 0          out BECN pkts 0
in DE pkts 0             out DE pkts 0
out bcast pkts 0         out bcast bytes 0
switched pkts 1
Detailed packet drop counters:
no out intf 0            out intf down 0          no out PVC 0
in PVC down 0            out PVC down 0           pkt too big 0
shaping Q full 0         pkt above DE 0           policing drop 0
pvc create time 00:03:53, last time pvc status changed 00:03:37

PVC Statistics for interface Serial0/2 (Frame Relay DCE)

DLCI = 201, DLCI USAGE = SWITCHED, PVC STATUS = ACTIVE, INTERFACE = Serial0/2

注意：

show frame pvc显示所有通过该帧交换路由器的DLCI。数据表明有2条PVC。接口为帧中继的DCE的接口，PVC的状态为活动状态。

FrameSwitch#show frame route //显示所配置的PVC中处于活动状态的的pvc.

Input Intf      Input Dlci      Output Intf     Output Dlci     Status
Serial0/0       200             Serial0/1       200             active
Serial0/0       201             Serial0/2       201             active
Serial0/1       200             Serial0/0       200             active
Serial0/2       201             Serial0/0       201             active

注意：

在这里配置了4个DLCI，R1用做一个网络集线器，R2,R3做为Frame-relay的DTE存在，R2,R3都有一条PVC接在R1上。

FrameSwitch#show int s0/0 //显示S0/0接口的状态

Serial0/0 is up, line protocol is up
Hardware is M4T
MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY, crc 16, loopback not set
Keepalive set (10 sec)
LMI enq sent 0, LMI stat recvd 0, LMI upd recvd 0
LMI enq recvd 121, LMI stat sent 121, LMI upd sent 0, DCE LMI up
LMI DLCI 0 LMI type is ANSI Annex D frame relay DCE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 00:21:14
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
     123 packets input, 1762 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
     123 packets output, 1992 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 output buffer failures, 0 output buffers swapped out
     1 carrier transitions     DCD=up DSR=up DTR=up RTS=up CTS=up

注意：输出的一些重要参数包含：接口封装形式（帧中继），LMI状态，该端口用做帧中继DCE,LMI信令类型（ANSI 附件），以及LMI交换路由器。

下面我们看一下R3上的情况：

R3#show frame map
Serial0/2 (up): ip 192.1.1.1 dlci 201(0xC9,0x3090), dynamic, //动态解析
broadcast,, status defined, active

注意：

R3已用RARP解析到R1的IP地址（192.1.1.1），但是R3还没有解析到R2的IP地址，这是因为R2只有连接到R1的PVC,而没有连接到R3的PVC.

特注意：
通常，一个配置成帧中继的路由器会对集线路由器进行反向地址解析，但不会对另外的配置成帧中继的路由器进行反向地址解析。

我们来测试一下连通性：

R3#ping 192.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 48/81/128 ms

情况表明链路是**的。

R3#show frame pvc

PVC Statistics for interface Serial0/2 (Frame Relay DTE)

              Active     Inactive      Deleted       Static
Local          1            0            0            0
Switched       0            0            0            0
Unused         0            0            0            0

DLCI = 201, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/2

input pkts 16            output pkts 16           in bytes 1594
out bytes 1594           dropped pkts 0           in FECN pkts 0
in BECN pkts 0           out FECN pkts 0          out BECN pkts 0
in DE pkts 0             out DE pkts 0
out bcast pkts 1         out bcast bytes 34
pvc create time 00:35:27, last time pvc status changed 00:34:27

情况表明R3的接口S0/2上DLCI 201是**的。

R3#ping 192.1.1.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.1.1.3, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

情况表明R2,R3链路没连通。

R2的情况验证（请参考R3的验证）

情况也表明，R2,R3之间没有连通。

R1的情况验证：

R1#show frame pvc

PVC Statistics for interface Serial0/0 (Frame Relay DTE)

              Active     Inactive      Deleted       Static
Local          2            0            0            0
Switched       0            0            0            0
Unused         0            0            0            0

DLCI = 200, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0

input pkts 11            output pkts 10           in bytes 1074
out bytes 1040           dropped pkts 0           in FECN pkts 0
in BECN pkts 0           out FECN pkts 0          out BECN pkts 0
in DE pkts 0             out DE pkts 0
out bcast pkts 0         out bcast bytes 0
pvc create time 00:44:46, last time pvc status changed 00:43:26

DLCI = 201, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/0

input pkts 16            output pkts 15           in bytes 1594
out bytes 1560           dropped pkts 0           in FECN pkts 0
in BECN pkts 0           out FECN pkts 0          out BECN pkts 0
in DE pkts 0             out DE pkts 0
out bcast pkts 0         out bcast bytes 0

情况表明R1有两条PVC,分别为 R1-----R2,R1----R3.

R1#show frame map

Serial0/0 (up): ip 192.1.1.3 dlci 200(0xC8,0x3080), dynamic,   //动态解析给IP 192.1.1.3
              broadcast,, status defined, active
Serial0/0 (up): ip 192.1.1.4 dlci 201(0xC9,0x3090), dynamic,    //动态解析给IP 192.1.1.4
              broadcast,, status defined, active
pvc create time 00:44:47, last time pvc status changed 00:41:27

情况表明，R1已将它的两条DLCI解析给远端IP地址。

R1#ping 192.1.1.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.1.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/68/128 ms
R1#ping 192.1.1.4

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.1.1.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/45/84 ms

情况表明R1分别与R2,R3的连通正常。

好了，如果我们需要R2与R3之间能进行通行,该怎么办呢？

解决的方法是在R2路由上用一条帧中继映射语句告诉R2如何到达R3，同时在R3路由上用一条帧中继映射语句告诉R3如何到达R2，那么它们之间就可以连通了。

具体情况，如下：

R2:

R2(config)#int s0/1
R2(config-if)#frame-relay map ip 192.1.1.4 200 //映射语句，使 IP地址与DLCI关联起来
R2(config-if)#end
R2#

R3:

R3(config)#int s0/2
R3(config-if)#frame-relay map ip 192.1.1.3 201
R3(config-if)#end
R3#

我们可以使用show frame pvc 来验证一下：

R3#show frame map
Serial0/2 (up): ip 192.1.1.1 dlci 201(0xC9,0x3090), dynamic,
broadcast,, status defined, active
Serial0/2 (up): ip 192.1.1.3 dlci 201(0xC9,0x3090), static,
CISCO, status defined, active

情况表明：与R1的映射是动态的，与R2的解析是静态的。

R2#show frame map
Serial0/1 (up): ip 192.1.1.1 dlci 200(0xC8,0x3080), dynamic,
broadcast,, status defined, active
Serial0/1 (up): ip 192.1.1.4 dlci 200(0xC8,0x3080), static,
CISCO, status defined, active

情况表明：与R1的映射是动态的，与R3的解析是静态的。

验证连通性：

R2#ping 192.1.1.4

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.1.1.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 260/332/404 ms

R3#ping 192.1.1.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.1.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 276/408/656 ms

以上情况表明R2,R3之间的通信正常。

文章不足之处，请大家多多指教。

转载于:https://blog.51cto.com/litclive/125234

配置部分PVC网状网络完全连接及帧中继映射(详细配置)

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