HI. We have a problem on our main RB800.
We have RB800 to net. ON the output eth we have addresses 10.0.0.1/30 and 10.0.0.134/29.
On the ethernet there is ubnt 10G with IP 10.0.0.132.
On the other side there is ubnt 10G with IP 10.0.0.131 and connected to eth of another RB800. (both ubnt in bridged mode)
Addresses on the eth is 10.0.0.129/29. Also there are another addresses on the rest of ports (e.g. 10.0.14.0/24)
For routing we use OSPF.
What’s the problem: When I try to access/ping some device from the main RB800 (10.0.0.1) I can do it only on few addresses 10.0.0.x.
(what I tried its 129,131,132,134 and 138 (another RB connected to 129))
If I try it on 10.0.x.x it doesn’t work. Screen from ping:
From the second RB I can ping anything.
The interesting thing is, that network work OK for the end users.
The main RB is almost clear, not filter rules which could block it.
Doe’s anyone had this problem? 
Thanks
SOLVED! We had on both ubnt default gateway 10.0.0.134. After correcting the second one to 10.0.0.129 it works OK 