ID originating from the router of this LSA. 
Dead Time. If no Hello packet is received from the neighbors, 
the neighbor is considered failed. If dead times of two adjacent 
routers  are  different,  the  neighbor  relationship  can  not  be 
established. 
ID of the area in which the router originating from the LSA is 
located 
By  default,  the  interface  automatically  calculates  overhead  in 
accordance with the current bandwidth. 
Send interval of Hello packet. If the the Hello time between two 
adjacent  routers  is  different,  you  can  not  establish  a  neighbor 
relationship. 
Since  there  may  be  multiple  routing  protocols  simultaneously 
running on the router, there is the problem of routing information 
share and selection among routing protocols. The system sets a 
priority  for  each  routing  protocol.  When  the  same  routing  is 
found in different protocols, the routing with higher priority will 
be preferentially selected.   
LSA retransmission delay timer 
When the router notifies an LSA to its neighbor, it is required to 
make  acknowledgement.  If  no  acknowledgement  packet  is 
received  within  the  retransmission  interval,  this  LSA  will  be 
retransmitted to the neighbor.