连接Brocade san switch 或者san switch module使用 Brocade 8GB SFP无法正常通信的问题，需要更改交换机端口的Fill word。【Brocade san switch只能使用Brocade 8GB SFP】
详细的解决方法：
1.检查san switch的端口 fill word
cli:portcfgshow
Ports of Slot 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
-----------------+--+--+--+--+----+--+--+--+----+--+--+--+----+--+--+-- Speed AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN Fill Word 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0- Fillword set to IDLE (This is how it should be set.) 1- Fillword set to ARB
2.在端口上开启IDLE（enable IDLE on ports） cli：portcfgfillword 15 0
portcfgfillword x(x is the port number) 0
Ports of Slot 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
-----------------+--+--+--+--+----+--+--+--+----+--+--+--+----+--+--+-- Speed AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN Fill Word 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
3.关闭端口（disable port） cli：portdisable 0 0
4.开启端口（enable port） cli：portenable 0 0
5.检查san switch 和端口的状态 switchshow