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dynagen/dynamips实验-帧中继交换配置
三台路由器R1、R2、R3分别通过串行接口s1/0连接到帧中继交换机FRSwitch的S1/1、S1/2、S1/3接口
R1:s1/0 172.16.1.1/24---FR:s1/1
R2:s1/0 172.16.1.2/24---FR:s1/2
R3:s1/0 172.16.1.3/24---FR:s1/3
R1--FR LMI:ANSI
R2--FR LMI:CISCO
R3--FR LMI:ANSI
R1--R2 DLCI:102---201
R1--R3 DLCI:102---301
R2--R1 DLCI:201---102
R2--R3 DLCI:203---302
R3--R1 DLCI:301---103
R3--R2 DLCI:302---203
实验拓朴图：
拓朴的dynagen配置文件：
autostart = false
[localhost]
port = 7200
udp = 10000
workingdir = f:\lab\3640\
[[3640]]
image = f:\lab\c3640-telco-124-13.bin
ram = 64
confreg = 0x2102
idlepc = 0x6100bf2c
exec_area = 64
mmap = false
slot1 = NM-4T
# [[router TermServ]]
# model=3640
# e0/0 = NIO_gen_eth:\Device\NPF_{1D0AB987-6689-4B46-8AF5-27395AD05B0B}
[[router R1]]
model=3640
# e0/0 = R3 e0/0
[[router R2]]
model=3640
# s1/2 = R3 s1/1
[[router R3]]
model=3640
[[router FS]]
model=3640
s1/1 = R1 s1/0
s1/2 = R2 S1/0
s1/3 = R3 s1/0
基本术语：
PVC（永久虚电路）：用于传输帧的端到端传输逻辑，使用DLCI号来标识其地址。
DLCI（数据链路连接标识）：用于标识CPE到帧交换机间PVC的逻辑号码。只具有本地意义
LMI（本地管理接口）：定义路由器与帧中继交换机间的信号类型。
NNI（网络到网络接口）：用于帧中继交换机间的连接
帧中继交换机配置步骤：
1、启用帧中继交换
2、配置接口的LMI和帧中继接口类型
3、配置PVC，使用frame-relay route命令
帧中继交换机上的配置:
FRSwitch#sh run
Building configuration...
Current configuration : 1231 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname FRSwitch
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
!
!
frame-relay switching #启用帧中继交换
!
!
!
!
!
interface Serial1/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/1
no ip address
encapsulation frame-relay #定义接口使用帧中继封装
serial restart-delay 0
clock rate 56000
frame-relay lmi-type ansi #定义LMI信号类型
frame-relay intf-type dce #定义帧中继接口类型
frame-relay route 102 interface Serial1/2 201 #配置PVC
frame-relay route 103 interface Serial1/3 301
!
interface Serial1/2
no ip address
encapsulation frame-relay
serial restart-delay 0
clock rate 96000
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 201 interface Serial1/1 102
frame-relay route 203 interface Serial1/3 302
!
interface Serial1/3
no ip address
encapsulation frame-relay
serial restart-delay 0
clock rate 96000
frame-relay lmi-type ansi
frame-relay intf-type dce
frame-relay route 301 interface Serial1/1 103
frame-relay route 302 interface Serial1/2 203
!
ip http server
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
login
!
end
连接到帧中继的路由器配置：
R1#sh run
Building configuration...
Current configuration : 789 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
!
!
!
!
!
!
!
interface Serial1/0
ip address 172.16.1.1 255.255.255.0 #配置接口IP地址
encapsulation frame-relay #启用帧中继封装
serial restart-delay 0
frame-relay map ip 172.16.1.3 103 broadcast #定义远程IP与本地DLCI的对应关系
frame-relay map ip 172.16.1.2 102 broadcast
!
interface Serial1/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
ip http server
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
logging synchronous
login
line aux 0
line vty 0 4
login
!
end
R1#
我的排错心得（LMI的keeplive时间是10s，所以配置后可能会等一下才能生效）：
1、PVC两端DLCI对应关系错误。
FRSwitch#show frame-relay route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial1/1 102 Serial1/2 102 inactive
Serial1/1 103 Serial1/3 301 active
Serial1/2 201 Serial1/1 102 active
Serial1/2 203 Serial1/3 302 active
Serial1/3 301 Serial1/1 103 active
Serial1/3 302 Serial1/2 203 active
FRSwitch#
只有一条PVC为非活动状态。一眼看出是对应关系不正确。如上所示我们期望的是102-201
FRSwitch#sh run int s1/1
Building configuration...
Current configuration : 259 bytes
!
interface Serial1/1
no ip address
encapsulation frame-relay
serial restart-delay 0
clock rate 56000
frame-relay lmi-type ansi
frame-relay intf-type dce
frame-relay route 102 interface Serial1/2 102 #应该将后面的一个102改成201
frame-relay route 103 interface Serial1/3 301
end
2、路由器接口与帧中继交换相连接口LMI类型不匹配
FRSwitch#sh fr route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial1/1 102 Serial1/2 201 active
Serial1/1 103 Serial1/3 301 active
Serial1/2 201 Serial1/1 102 inactive
Serial1/2 203 Serial1/3 302 active
Serial1/3 301 Serial1/1 103 inactive
Serial1/3 302 Serial1/2 203 active
FRSwitch#
所有去往s1/1接口的PVC建立不成功。
查看接口状态：
FRSwitch#sh int s1/1 | i 1/1
Serial1/1 is up, line protocol is down
查看接口的LMI类型：
FRSwitch#sh fr lmi int s1/1
LMI Statistics for interface Serial1/1 (Frame Relay DCE) LMI TYPE = ANSI
Invalid Unnumbered info 0 Invalid Prot Disc 0
Invalid dummy Call Ref 0 Invalid Msg Type 0
Invalid Status Message 0 Invalid Lock Shift 0
Invalid Information ID 0 Invalid Report IE Len 0
Invalid Report Request 0 Invalid Keep IE Len 0
Num Status Enq. Rcvd 733 Num Status msgs Sent 710
Num Update Status Sent 0 Num St Enq. Timeouts 26
FRSwitch#
查找看R1 s1/0接口的lmi状态：
R1(config-if)#do show frame-relay lmi int s1/0
LMI Statistics for interface Serial1/0 (Frame Relay DTE) LMI TYPE = CISCO
Invalid Unnumbered info 0 Invalid Prot Disc 0
Invalid dummy Call Ref 0 Invalid Msg Type 0
Invalid Status Message 0 Invalid Lock Shift 0
Invalid Information ID 0 Invalid Report IE Len 0
Invalid Report Request 0 Invalid Keep IE Len 0
Num Status Enq. Sent 780 Num Status msgs Rcvd 710
Num Update Status Rcvd 0 Num Status Timeouts 71
Last Full Status Req 00:00:01 Last Full Status Rcvd 00:08:01
R1(config-if)#
查看并修R1 s1/1接口配置：
R1#show running-config interface serial 1/0
Building configuration...
Current configuration : 233 bytes
!
interface Serial1/0
ip address 172.16.1.1 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 172.16.1.3 103 broadcast
frame-relay map ip 172.16.1.2 102 broadcast
frame-relay lmi-type cisco #no 掉这个配置
end
R1#
由于我们将帧中继交换接口类型配置为dce所以，与之相连的路由器可以自动设置lmi类型，不用手动配置。
FRSwitch#show running-config interface s1/1 | i intf
frame-relay intf-type dce #只有使用frame-relay switching 启用了帧中继交换，才能配置intf-type为dce
FRSwitch#
R1(config-if)#frame-relay intf-type dce
Must enable frame-relay switching to configure DCE/NNI
R1(config-if)#
3、帧中继交换端口，未指定lmi类型或intf dce或接口clock rate
FRSwitch#sh fr route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial1/1 102 Serial1/2 201 inactive
Serial1/1 103 Serial1/3 301 inactive
Serial1/2 201 Serial1/1 102 inactive
Serial1/2 203 Serial1/3 302 active
Serial1/3 301 Serial1/1 103 inactive
Serial1/3 302 Serial1/2 203 active
所有出s1/1接口进出的PVC都不正常。查看接口配置，未配置lmi-type,intf类型
FRSwitch#sh run int s1/1
Building configuration...
Current configuration : 205 bytes
!
interface Serial1/1
no ip address
encapsulation frame-relay
serial restart-delay 0
clock rate 56000
frame-relay route 102 interface Serial1/2 201
frame-relay route 103 interface Serial1/3 301
end
FRSwitch#
4、DLCI只具有本地意义的理解：
FRSwitch#show frame-relay route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial1/1 102 Serial1/2 102 inactive
只要配置正确，这种对应关系也可以成立的，由于DLCI只具有本地意义，所以R1到R2 PVC两端的DLCI号码相同是完全可以的。我们将两端DLCI都配置为102的配置：
FRSwitch#sh run int s1/1
Building configuration...
Current configuration : 259 bytes
!
interface Serial1/1
no ip address
encapsulation frame-relay
serial restart-delay 0
clock rate 56000
frame-relay lmi-type ansi
frame-relay intf-type dce
frame-relay route 102 interface Serial1/2 102
frame-relay route 103 interface Serial1/3 301
end
FRSwitch#
R2#sh run int s1/0
Building configuration...
Current configuration : 205 bytes
!
interface Serial1/0
ip address 172.16.1.2 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 172.16.1.3 203 broadcast
frame-relay map ip 172.16.1.1 102 broadcast
end
R2#
FRSwitch#sh fr route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial1/1 102 Serial1/2 102 active
这样就可以了。
附件内容是拓朴图，dynagen的net配置文件，及各路由器的配置文件：
 |
| 文件: |
FRsw.rar |
| 大小: |
22KB |
| 下载: |
下载 | |
