帧中继失败实验（自己找不到原因）请指点迷津啊

R1配置

en
conf t
host R1
lin con 0
no exec-t
logg sy
exi
no ip do lo

int s1/2
encapsulation f
frame-relay lmi-type c
no shu
exi

int s1/2.1 m
bandwidth 640000
no frame-relay inverse-arp    
ip add 1.1.1.1 255.255.255.0
frame-relay map ip 1.1.1.2 102 b
frame-relay map ip 1.1.1.3 103 b
frame-relay interface-dlci 102
frame-relay interface-dlci 103
no shu
exi
router ospf 101                    
net 1.1.1.0 0.0.0.255 area 0 
exi

 

R2配置

en
conf t
host R2
lin con 0
no exec-t
logg sy
exi
no ip do lo
int s1/2
en fr
FRAme-relay lmi-type c
bandwidth 640000
no frame-relay inverse-arp    
ip ad 1.1.1.2 255.255.255.0
frame-relay map ip 1.1.1.1 201 b
frame-relay interface-dlci 201
no shu
exi
router ospf 101                    
net 1.1.1.0 0.0.0.255 area 0
exi
exi
ping 1.1.1.1

 

R3配置

en
conf t
host R3
lin con 0
no exec-t
logg sy
exi
no ip do lo
int s1/2
en fr
FRAme-relay lmi-type c
bandwidth 640000
no frame-relay inverse-arp    
ip ad 1.1.1.3 255.255.255.0
frame-relay map ip 1.1.1.1 301 b
frame-relay interface-dlci 301
no shu
exi
router ospf 101                    
net 1.1.1.0 0.0.0.255 area 0
exi
exit
ping 1.1.1.1
exit
ping 1.1.1.2