Routing

Hi everyone,

Let's say we have MX1 running OSPF and OSPF3 realm ipv4-unicast. MX1 is learning 10.10.10.0/24 via OSPF and also via OSPF3. 

Which  route MX1 will mark active? One via OSPF or OSPF3?

Much appreciated!!

Hi,

Very interesting case.

It appears that with default preference of 10 (for both OSPFv2 and OSPFv3) Junos will prefer OSPFv2. Moreover, even with load-balancing policy it will not consider OSPFv3 as second possible path - 

[edit]
root@R1# run show route 192.168.100.1/32 detail       

inet.0: 11 destinations, 13 routes (11 active, 0 holddown, 0 hidden)
192.168.100.1/32 (2 entries, 1 announced)
        *OSPF   Preference: 10
                Next hop type: Router, Next hop index: 1738
                Address: 0xcd692c4
                Next-hop reference count: 11
                Next hop: 172.16.1.0 via ge-0/0/0.0, selected
                Session Id: 0x140
                State: <Active Int>
                Local AS: 65000 
                Age: 1:00:54     Metric: 1 
                Validation State: unverified 
                Area: 0.0.0.0
                Task: OSPF
                Announcement bits (4): 0-KRT 2-Resolve tree 4 4-Resolve tree 5 5-Resolve_IGP_FRR task 
                AS path: I 
                Session-IDs associated:
                Session-id: 322 Version: 0
                Thread: junos-main 
         OSPF3  Preference: 10
                Next hop type: Router, Next hop index: 1738
                Address: 0xcd692c4
                Next-hop reference count: 11
                Next hop: 172.16.1.0 via ge-0/0/0.0, selected
                Session Id: 0x140
                State: <Int Changed>
                Inactive reason: OSPF version
                Local AS: 65000 
                Age: 1:00:48     Metric: 1 
                Validation State: unverified 
                Area: 0.0.0.0
                Task: OSPF3
                AS path: I 
                Thread: junos-main 

Hi everyone,

Let's say we have MX1 running OSPF and OSPF3 realm ipv4-unicast. MX1 is learning 10.10.10.0/24 via OSPF and also via OSPF3. 

Which  route MX1 will mark active? One via OSPF or OSPF3?

Much appreciated!!