The failed of transmit caused by FIB error

Publication Date:  2012-12-17 Views:  219 Downloads:  0
Issue Description
After adjusted the firewall routing in a network, a web server did not fuctioned. 
Alarm Information
None.
Handling Process
Checking the routing list, discovered that the adjusted routing is normal, but the transmition is failed.

to examinate FIB table, it is not finded the corresponded item in the FIB list, it may be the issued bug caused the route finally not to become effective.

[USG2200]disp ip rout    
11:04:03  2012/12/13
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
        Destinations : 10       Routes : 10 
    
Destination/Mask    Proto  Pre  Cost     Flags NextHop         Interface      

        0.0.0.0/0   Static 60   0          RD  100.1.1.1       GigabitEthernet0/0/1
       99.1.1.0/24  Direct 0    0           D  99.1.1.1        GigabitEthernet0/0/0
       99.1.1.1/32  Direct 0    0           D  127.0.0.1       InLoopBack0    
      100.1.1.0/24  Direct 0    0           D  100.1.1.2       GigabitEthernet0/0/1
      100.1.1.2/32  Direct 0    0           D  127.0.0.1       InLoopBack0    
      127.0.0.0/8   Direct 0    0           D  127.0.0.1       InLoopBack0    
      127.0.0.1/32  Direct 0    0           D  127.0.0.1       InLoopBack0    
    192.168.1.0/24  Direct 0    0           D  192.168.1.1     Vlanif1        
    192.168.1.1/32  Direct 0    0           D  127.0.0.1       InLoopBack0    
      200.1.1.0/24  Static 60   0          RD  99.1.1.2        GigabitEthernet0/0/0 
[USG2200]disp fib 
11:04:07  2012/12/13
Fib Flags: B - blackhole, D - dynamic, G - gateway, H - host, S - static      
           U - up
------------------------------------------------------------------------------
FIB Table:   
Total number of Routes : 10
 
Destination/Mask   Nexthop         Flag TimeStamp     Interface       TunnelID
127.0.0.1/32       127.0.0.1       HU   t[57]         InLoop0         0x0     
127.0.0.0/8        127.0.0.1       U    t[57]         InLoop0         0x0     
192.168.1.1/32     127.0.0.1       HU   t[125]        InLoop0         0x0     
192.168.1.0/24     192.168.1.1     U    t[125]        Vlanif1         0x0     
99.1.1.1/32        127.0.0.1       HU   t[94889]      InLoop0         0x0     
99.1.1.0/24        99.1.1.1        U    t[94889]      GE0/0/0         0x0     
100.1.1.2/32       127.0.0.1       HU   t[94952]      InLoop0         0x0     
100.1.1.0/24       100.1.1.2       U    t[94952]      GE0/0/1         0x0     
0.0.0.0/0          100.1.1.1       GSU  t[95514]      GE0/0/1         0x0
[USG2200] 
Deletes the route repeatedly, and redeploys the route, transfers the publication not to correspond the repeater item, this possibly involves the edition flaw, after restarts the equipment , the transmition is normal,  and then the correspond item was find in the FIB.
Root Cause
After adjusting the route, the discontinuance of business generally speaking many concerns with the route that adjusts. 
Suggestions
it is not only check the routing table but the FIB table in doing troubleshooting of transmit failed,  generally it is ofen to neglect to inspection FIB infomation.

END