— Exhibit —
[edit]
user@router# show protocols ospf
traffic-engineering advertise-unnumbered-interfaces;
area 0.0.0.0 {
interface all;
}
[edit]
user@router# show interfaces
ge-0/0/0 {
unit 0 {
family inet {
address 172.16.12.15/24;
}
}
ge-1/0/0 {
unit 0 {
family inet {
address 66.129.12.1/24;
}
}
lo0 {
unit 0 {
family inet {
address 127.0.0.5/32;
}
}
[edit]
user@router# show routing-options
route-distinguisher-id 130.0.0.28;
— Exhibit —
Referring to the exhibit, which address represents the RID?
A.
66.129.12.1
B.
172.16.12.15
C.
127.0.0.5
D.
130.0.0.28
http://wiki.nil.com/OSPF_Router_ID_selection_algorithm
so RID is 127.0.0.5 ?
172.16.12.15 is correct
127.0.0.5 is martian addressed and connot be RID
The router identifier is used by OSPF to identify the routing device from which a packet originated. Junos OS selects a router identifier according to the following set of rules:
By default, Junos OS selects the lowest configured physical IP address of an interface as the router identifier.
If a loopback interface is configured, the IP address of the loopback interface becomes the router identifier.
If multiple loopback interfaces are configured, the lowest loopback address becomes the router identifier.
If a router identifier is explicitly configured using the router-id address statement under the [edit routing-options] hierarchy level, the above three rules are ignored.