Routing

Hi All,

I was hoping someone could help explain to me the behavior of some bgp route that I have.

I attached a picture to show the general setup but essentially I want some route to be prefered by one internet connection over another.  My question is my route has a protocol next hop of what I would expect (192.168.1.2) as this is where the route was learned from but the next-hop being selected is actually 100.100.100.2 which is just some other interface on the routers that does not even run bgp.

I am curious why it picked that for the next hop instead of simply putting in the interface it learned the route from.  This works fine as is, I am just unclear why the protocol next hop and next hop are not the same in this case (both network are directly connected thus are reachable).

I attached an image for clarification.

root@RouterA> show route 8.8.8.8 detail

inet.0: 466569 destinations, 518494 routes (466569 active, 0 holddown, 0 hidden)
8.8.8.0/24 (2 entries, 1 announced)
        *BGP    Preference: 170/-201
                Next hop type: Indirect
                Address: 0x27b8990
                Next-hop reference count: 161502
                Source: 192.168.1.2
                Next hop type: Router, Next hop index: 569
                Next hop: 100.100.100.2 via ge-0/0/1.0, selected
                Protocol next hop: 192.168.1.2
                Indirect next hop: 25d8ae0 1048574
                State: <Active Int Ext>
                Local AS: 42520 Peer AS: 42520
                Age: 2w0d 21:34:17      Metric2: 1
                Task: BGP_42520.192.168.1.2+64887
                Announcement bits (2): 0-KRT 5-Resolve tree 1
                AS path: 2777715169 I
                Communities: 27777:80
                Accepted
                Localpref: 200
                Router ID: 192.168.1.2
         BGP    Preference: 170/-101
                Next hop type: Router, Next hop index: 565
                Address: 0x27b8600
                Next-hop reference count: 1290091
                Source: 80.80.80.1
                Next hop: 80.80.80.1 via ge-0/0/0.0, selected
                State: <Ext>
                Inactive reason: Local Preference
                Local AS: 42520 Peer AS:  7888
                Age: 2w0d 8:57:00
                Task: BGP_7888.80.80.80.1+179
                AS path: 7888 15169 I
                Accepted
                Localpref: 100
                Router ID: 24.226.0.1

root@RouterA> show route 100.100.100.2

inet.0: 466996 destinations, 518929 routes (466996 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

100.100.100.0/24   *[Direct/0] 2w0d 22:33:27
                    > via ge-0/0/1.0

root@RouterA> show route 100.100.100.2 detail

inet.0: 466997 destinations, 518930 routes (466997 active, 0 holddown, 0 hidden)
100.100.100.0/24 (1 entry, 1 announced)
        *Direct Preference: 0
                Next hop type: Interface
                Address: 0x27b864c
                Next-hop reference count: 2
                Next hop: via ge-0/0/1.0, selected
                State: <Active Int>
                Local AS: 42520
                Age: 2w0d 22:33:29
                Task: IF
                Announcement bits (1): 5-Resolve tree 1
                AS path: I

Sorry I meant:

show route 192.168.1.2

You helped me answer my on question.  Due to some loopback configs I am learning that IP via OSPF and thus the reason why it shows up as the next hop.

Thanks!