MSR路由器V7和MSR路由器V5通过帧中继网络无法建立OSPF邻居经验案例

总部一台MSR2600（V5版本）通过帧中继网络分别和分支1的 MSR50(V5版本)、分支2 的MSR56(V7版本)建立OSPF邻居，相同配置的情况下MSR26和分支2 的MSR56设备无法建立OSPF邻居，但是和分支1的V5设备是能够建立的。

MSR26的配置：

ospf 1 
area 0.0.0.248 

network 10.10.251.112 0.0.0.7 

area 0.0.1.44 

network 10.10.251.120 0.0.0.7

interface Serial 1/2/2  //连接MSR56，不能建立起来ospf邻居

fr dlci 101 

ip address 10.10.251.121 255.255.255.248 
ospf network-type p2p

interface Serial 1/2/1 //连接MSR50，可以建立起来ospf邻居

fr dlci 100 

ip address 10.10.251.113 255.255.255.248 
ospf network-type p2p

MSR56的配置：

ospf 1 

area 0.0.1.44 

network 10.10.251.120 0.0.0.7

interface Serial 1/2/2

fr dlci 101

ip address 10.10.251.124 255.255.255.248 

ospf network-type p2p

V5产品：broadcast属性是在map下的，对于动态创建的map，天然就具备broadcast属性。

例如：

#                                                                              

interface Serial5/0:0.1                                                         

 fr dlci 100                                                                   

 ip address 10.10.251.113 255.255.255.248                                      

 ospf network-type p2p                                                          

#                                                                              

return                                                                         

[3020-Serial5/0:0.1]                                                           

[3020-Serial5/0:0.1]dis fr map int s5/0:0.1                                    

Map statistics for interface Serial5/0:0.1 (DCE, MP)                           

  DLCI = 100, IP INARP 10.10.251.116, Serial5/0:0.1                            

    create time = 2015/07/07 11:17:49, status = ACTIVE                         

    encapsulation = ietf, vlink = 3, broadcast  

对于V7设备，broadcast属性是在PVC下的，对于静态PVC（dce侧，配置fr dlci），需要配置broadcast才具备广播属性，对于动态PVC（dte侧不用配置dlci，动态学习dce侧的pvc），天然具有广播属性。

例如：

DCE侧：

interface Serial1/2/2                                                                                                            

 link-protocol fr                                                                                                                  

 fr interface-type dce                                                                                                              

 fr dlci 101                                                                                                                       

  broadcast                                                                                                                         

 ip address 10.10.251.121 255.255.255.248                                                                                          

 ospf network-type p2p                                                                                                              

#                                                                                                                                  

return                                                                                                                              

[MSR5600-Serial1/2/2]dis fr pvc int s1/2/2                                                                                 

PVC information for interface Serial1/2/2/2 (DCE, physically up)                                                                   

  DLCI: 101  Type: Static  Interface: Serial1/2/2    //静态PVC，所以需要在fr dlci 101下配置broadcast后，才能具备广播属性                                                                           

    Encapsulation: IETF  Broadcast                                                                                                 

    Creation time: 2015/07/07 10:57:23  Status: Active                                                                             

    Input: 159 packets, 11392 bytes, 0 dropped                                                                                     

    Output: 138 packets, 9914 bytes, 0 dropped                                                                                      

[MSR5600-Serial1/2/2]  

DTE侧：

interface Serial1/2/2                                                                                                               

 link-protocol fr                                                                                                                  

 ip address 10.10.251.124 255.255.255.248                                                                                           

 ospf network-type p2p                                                                                                             

#                                                                                                                                   

return                                                                                                                             

[HP-3044-Serial1/2/2]dis fr pvc int s1/2/2                                                                                         

PVC information for interface Serial1/2/2 (DTE, physically up)                                                                     

  DLCI: 101  Type: Dynamic  Interface: Serial1/2/2    //动态PVC，天然具备广播属性，不需要在fr dlci *下配置broadcast                                                                              

    Encapsulation: IETF  Broadcast                                                                                                  

    Creation time: 2015/07/07 10:51:45  Status: Active                                                                             

    Input: 138 packets, 9956 bytes, 0 dropped                                                                                       

    Output: 159 packets, 11392 bytes, 0 dropped 

在V7设备配置Broadcast广播属性解决问题。