169 
Syntax 
pic [ additional-path-always ] 
undo pic 
Default 
OSPF PIC is enabled. 
Views 
OSPF view 
Predefined user roles 
network-admin 
Parameters 
additional-path-always: Allows the indirect suboptimal route as the backup route. 
Usage guidelines 
Prefix Independent Convergence (PIC) enables the device to speed up network convergence by ignoring 
the number of prefixes. PIC applies to only inter-area routes and external routes. 
When both OSPF PIC and OSPF FRR are configured, OSPF FRR takes effect. 
Examples 
# Configure OSPF PIC to support the suboptimal route as the backup route. 
<Sysname> system-view 
[Sysname] ospf 1 
[Sysname-ospf-1] pic additional-path-always 
preference 
Use preference to set a preference for OSPF.  
Use undo preference to restore the default. 
Syntax 
preference [ ase ] [ route-policy route-policy-name ] value 
undo preference [ ase ] 
Default 
The preference is 10 for OSPF internal routes and 150 for OSPF external routes (or ASE routes). 
Views 
OSPF view 
Predefined user roles 
network-admin 
Parameters 
ase: Sets a preference for OSPF external routes. Without this keyword, the command sets a preference 
for OSPF internal routes. 
route-policy route-policy-name: Specifies a routing policy by its name, a case-sensitive string of 1 to 63 
characters, to set a preference for the specified routes.