sham-link配置不成功，求解

dxdzmm

如图，创建sham-link拓扑，在R1、R2上建立sham-link。
下面是配置：
R1:
hostname R1
boot-start-marker
boot-end-marker
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
ip vrf vpn1
rd 100:1
route-target export 100:1
route-target import 100:1
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
ip tcp synwait-time 5
ip ssh version 1
interface Loopback0
ip address 1.1.1.1 255.255.255.255
interface Loopback100
ip vrf forwarding vpn1
ip address 100.1.1.1 255.255.255.255
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
interface Serial0/0
ip address 12.1.1.1 255.255.255.0
mpls label protocol ldp
mpls ip
clock rate 2000000
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
interface Serial0/1
ip vrf forwarding vpn1
ip address 13.1.1.1 255.255.255.0
clock rate 2000000
interface FastEthernet1/0
no ip address
shutdown
duplex auto
speed auto
interface FastEthernet2/0
no ip address
shutdown
duplex auto
speed auto
router ospf 2 vrf vpn1
router-id 1.1.1.1
log-adjacency-changes
area 1 sham-link 100.1.1.1 100.1.1.2 cost 10
redistribute bgp 100 subnets
network 13.1.1.1 0.0.0.0 area 1
router rip
version 2
network 1.0.0.0
network 12.0.0.0
no auto-summary
router bgp 100
no synchronization
bgp router-id 1.1.1.1
bgp log-neighbor-changes
neighbor 2.2.2.2 remote-as 100
neighbor 2.2.2.2 update-source Loopback0
no auto-summary
address-family vpnv4
  neighbor 2.2.2.2 activate
  neighbor 2.2.2.2 send-community both
exit-address-family
address-family ipv4 vrf vpn1
  redistribute ospf 2 vrf vpn1
  no synchronization
  network 100.1.1.1 mask 255.255.255.255
exit-address-family

ip forward-protocol nd
no ip http server
no ip http secure-server
no cdp log mismatch duplex        
mpls ldp router-id Loopback0 force


R2：
hostname R2
boot-start-marker
boot-end-marker
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
ip vrf vpn1
rd 100:1
route-target export 100:1
route-target import 100:1
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
ip tcp synwait-time 5
ip ssh version 1
interface Loopback0
ip address 2.2.2.2 255.255.255.255
interface Loopback100
ip vrf forwarding vpn1
ip address 100.1.1.2 255.255.255.255
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
interface Serial0/0
ip address 12.1.1.2 255.255.255.0
mpls label protocol ldp
mpls ip
clock rate 2000000
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
interface Serial0/1
ip vrf forwarding vpn1
ip address 24.1.1.2 255.255.255.0
clock rate 2000000
interface FastEthernet1/0
no ip address
shutdown
duplex auto
speed auto
interface FastEthernet2/0
no ip address
shutdown
duplex auto
speed auto
router ospf 2 vrf vpn1
router-id 2.2.2.2
log-adjacency-changes
area 1 sham-link 100.1.1.2 100.1.1.1 cost 10
redistribute bgp 100 subnets
network 24.1.1.2 0.0.0.0 area 1
router rip
version 2
network 2.0.0.0
network 12.0.0.0
no auto-summary
router bgp 100
no synchronization
bgp router-id 2.2.2.2
bgp log-neighbor-changes
neighbor 1.1.1.1 remote-as 100
neighbor 1.1.1.1 update-source Loopback0
no auto-summary
address-family vpnv4
  neighbor 1.1.1.1 activate
  neighbor 1.1.1.1 send-community both
exit-address-family
address-family ipv4 vrf vpn1
  redistribute ospf 2 vrf vpn1
  no synchronization
  network 100.1.1.2 mask 255.255.255.255
exit-address-family
ip forward-protocol nd
no ip http server
no ip http secure-server
no cdp log mismatch duplex      
mpls ldp router-id Loopback0 force


另外：R2#sh ip ospf sham-links
Sham Link OSPF_SL0 to address 100.1.1.1 is up
Area 1 source address 100.1.1.2
  Run as demand circuit
  DoNotAge LSA allowed. Cost of using 10 State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40,
    Hello due in 00:00:03
    Adjacency State INIT (Hello suppressed)
    Index 0/0, retransmission queue length 0, number of retransmission 0
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 0, maximum is 0
    Last retransmission scan time is 0 msec, maximum is 0 msec
R2的邻接状态是INIT。
R1#sh ip osp sham-links
Sham Link OSPF_SL0 to address 100.1.1.2 is up
Area 1 source address 100.1.1.1
  Run as demand circuit
  DoNotAge LSA allowed. Cost of using 10 State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40,
    Hello due in 00:00:05

R1看不到邻接状态。。。

R1#sh ip bgp vpnv4 all
BGP table version is 39, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf vpn1)
* i3.3.3.3/32       2.2.2.2                129    100      0 ?
*>                  13.1.1.3                65         32768 ?
* i4.4.4.4/32       2.2.2.2                 65    100      0 ?
*>                  13.1.1.3               129         32768 ?
* i13.1.1.0/24      2.2.2.2                192    100      0 ?
*>                  0.0.0.0                  0         32768 ?
*> 24.1.1.0/24      13.1.1.3               192         32768 ?
* i                 2.2.2.2                  0    100      0 ?
* i34.1.1.0/24      2.2.2.2                128    100      0 ?
*>                  13.1.1.3               128         32768 ?
*> 100.1.1.1/32     0.0.0.0                  0         32768 i
*>i100.1.1.2/32     2.2.2.2                  0    100      0 i


R1上到4.4.4.4/32也不是走的2.2.2.2这一跳，为什么？？？求解释。。。