Which two statements are correct regarding default protocol preference values? (Choose two.)
A.
RIP is preferred over OSPF external routes.
B.
Direct, local, and static routes have the same preference value.
C.
OSPF’s preference value is lower than BGP.
D.
OSPF has a single preference value for both internal and external routes.
Explanation:
The Junos OS uses route preference to rank routes received through the various route information sources and as the primary
criterion for selecting the active route.
The table shows the default preference values for a selected set of routing information sources. The complete list of default
route preference assignments is shown in the following table.
Direct 0 SNMP 50
Local 0 Router discovery 55
System routes 4 4 RIP 100
Static and Static LSPs 5 RIPng 100
RSVP-signaled LSPs 7 DVMRP 110
LDP-signaled LSPs 9 Aggregate 130
OSPF internal 10 OSPF AS external 150
IS-IS Level 1 internal 15 IS-IS Level 1 external 160
IS-IS Level 2 internal 18 IS-IS Level 2 external 165
Redirects 30 BGP (internal and external) 170
Kernel 40 MSDP 175
Routing preference values can range from 0 to 4,294,967,295. Lower preference values are preferred over higher preference
values. The following command output demonstrates that a static route with a preference of five is preferred over an OSPF
0
0
http://www.juniper.net/techpubs/en_US/junos13.3/topics/reference/general/routing-protocols-default-route-preference-values.html
0
0