S5560-54C-EI和对端烽火设备对接ospf卡在exchange 状态分析

s5560交换机和烽火交换机对接ospf

客户来电表示和对端烽火设备对接，双方配置ospf，但是路由状态卡在exchange和exstar状态，但是和我们华三另外一台设备s5500对接确认对接成功。一般情况下卡在exchange和exstar说明双方参数没有协商成功，导致ospf没有建立成功，指导客户修改mtu，双方都修改成1500还是一样的效果

这时候我们进展debug分析查看，能建立成功和不能建立成功的报文信息对报文进行对比

查看s5500报文

*Apr 26 12:10:30:848 2000 H3C RM/6/RMDEBUG: OSPF 100: SEND Packet.

*Apr 26 12:10:30:929 2000 H3C RM/6/RMDEBUG: Source Address: 10.120.63.101

*Apr 26 12:10:31:019 2000 H3C RM/6/RMDEBUG: Destination Address: 224.0.0.5

*Apr 26 12:10:31:109 2000 H3C RM/6/RMDEBUG: Ver# 2, Type: 1, Length: 44.

*Apr 26 12:10:31:201 2000 H3C RM/6/RMDEBUG: Router: 10.120.63.101, Area: 0.0.0.0, Checksum: 45761.

*Apr 26 12:10:31:321 2000 H3C RM/6/RMDEBUG: AuType: 00, Key(ascii): 0 0 0 0 0 0 0 0.

*Apr 26 12:10:31:421 2000 H3C RM/6/RMDEBUG: Net Mask: 255.255.255.0, Hello Int: 10, Option: _E_.       

*Apr 26 12:10:31:542 2000 H3C RM/6/RMDEBUG: Rtr Priority: 1, Dead Int: 40, DR: 0.0.0.0, BDR: 0.0.0.0.

*Apr 26 12:10:44:196 2000 H3C RM/6/RMDEBUG: OSPF 100: RECV Packet.

*Apr 26 12:10:44:288 2000 H3C RM/6/RMDEBUG: Source Address: 10.120.63.2

*Apr 26 12:10:44:378 2000 H3C RM/6/RMDEBUG: Destination Address: 10.120.63.101

*Apr 26 12:10:44:478 2000 H3C RM/6/RMDEBUG: Ver# 2, Type: 2, Length: 32.

*Apr 26 12:10:44:569 2000 H3C RM/6/RMDEBUG: Router: 10.120.63.2, Area: 0.0.0.0, Checksum: 27773.

*Apr 26 12:10:44:689 2000 H3C RM/6/RMDEBUG: AuType: 00, Key(ascii): 0 0 0 0 0 0 0 0.

*Apr 26 12:10:44:789 2000 H3C RM/6/RMDEBUG: MTU: 0, Option: _E_, R_I_M_MS Bit: _I_M_MS_.

*Apr 26 12:10:44:900 2000 H3C RM/6/RMDEBUG: DD SeqNumber: 145de.

查看s5560的报文

*Jan  1 00:30:12:827 2013 H3C OSPF/7/DEBUG: OSPF 100: Sending packets.                                                     

*Jan  1 00:30:12:827 2013 H3C OSPF/7/DEBUG: Source address: 10.120.63.101                                                  

*Jan  1 00:30:12:827 2013 H3C OSPF/7/DEBUG: Destination address: 10.120.63.1                                               

*Jan  1 00:30:12:827 2013 H3C OSPF/7/DEBUG: Version 2, Type: 2, Length: 32.                                                

*Jan  1 00:30:12:827 2013 H3C OSPF/7/DEBUG: Router: 10.120.63.101, Area: 0.0.0.0, Checksum: 48295.                         

*Jan  1 00:30:12:827 2013 H3C OSPF/7/DEBUG: Authentication type: 00, Key(ASCII): 0 0 0 0 0 0 0 0.                          

*Jan  1 00:30:12:827 2013 H3C OSPF/7/DEBUG: MTU: 1510, Option: _O_E_, R_I_M_MS Bit: _I_M_MS_.                              

*Jan  1 00:30:12:827 2013 H3C OSPF/7/DEBUG: DD Sequence number: af6b.                                                      

*Jan  1 00:30:12:836 2013 H3C OSPF/7/DEBUG: OSPF 100: Receiving packets.                                                   

*Jan  1 00:30:12:836 2013 H3C OSPF/7/DEBUG: Source address: 10.120.63.2                                                    

*Jan  1 00:30:12:836 2013 H3C OSPF/7/DEBUG: Destination address: 10.120.63.101                                             

*Jan  1 00:30:12:836 2013 H3C OSPF/7/DEBUG: Version 2, Type: 2, Length: 32.                                                

*Jan  1 00:30:12:836 2013 H3C OSPF/7/DEBUG: Router: 10.120.63.2, Area: 0.0.0.0, Checksum: 3214.                            

*Jan  1 00:30:12:836 2013 H3C OSPF/7/DEBUG: Authentication type: 00, Key(ASCII): 0 0 0 0 0 0 0 0.                          

*Jan  1 00:30:12:836 2013 H3C OSPF/7/DEBUG: MTU: 0, Option: _E_, R_I_M_MS Bit: _I_M_MS_.                                   

*Jan  1 00:30:12:836 2013 H3C OSPF/7/DEBUG: DD Sequence number: a5ce.  

发现我们5500交换机和5560交换机在协商报文的时候一个option有带了一个o一个没有带。O位，用来表明始发路由器支持Opaque LSA，由于5500交换机是v5的 5560是v7在和第三方厂家对接的时候可能由于对方厂家不支持携带该字段，导致无法协商成功

在ospf进程下配置undo opaque-capability 后可以建立起来，5500默认不开启该功能，5560默认开启，配置后双方ospf邻居建立成功。