OSPF over L2TP and 2 routers

RouterOS Forwarding Protocols
1

Good afternoon. I have a problem with the availability of my router. scheme:
Untitled_Diagram.jpg
All routers are configured with OSPF (backbone area ). The interface R(XN) looking at R2 has a weight of 60
And router R(XN) not ping R2, there is a route to R2 via R1. But R1 ping R2 not problem and vice versa.
nat not use router R1.
If change ospf interface to type broadcast, both interface router R(XN) State: designated router.
What can I be missing?

2

For example:

[R7] > /routing ospf interface print
Flags: X - disabled, I - inactive, D - dynamic, P - passive 
 #    INTERFACE                                                                                                                                                           COST PRIORITY NETWORK-TYPE   AUTHENTICATION AUTHENTICATION-KEY
 0    l2tp-R2                                                                                                                                                               60        1 point-to-point none
 1 DP loopback                                                                                                                                                              10        1 broadcast      none
 2 D  l2tp-R1

[R7] > /routing ospf neighbor print 
 0 instance=default router-id=172.16.25.2 address=172.16.26.132 interface=l2tp-R2 priority=1 dr-address=0.0.0.0 backup-dr-address=0.0.0.0 state="Full" state-changes=4 ls-retransmits=0 ls-requests=0 db-summaries=0 adjacency=1m26s 
 1 instance=default router-id=172.16.25.1 address=172.16.26.1 interface=l2tp-R1 priority=1 dr-address=0.0.0.0 backup-dr-address=0.0.0.0 state="Full" state-changes=4 ls-retransmits=0 ls-requests=0 db-summaries=0 adjacency=7h32m45s

[R7] > ping 172.16.25.1
  SEQ HOST                                     SIZE TTL TIME  STATUS
    0 172.16.25.1                                56  64 548ms
    1 172.16.25.1                                56  64 549ms
    sent=2 received=2 packet-loss=0% min-rtt=548ms avg-rtt=548ms max-rtt=549ms 
[R7] > ping 172.16.25.2
  SEQ HOST                                     SIZE TTL TIME  STATUS
    0 172.16.25.2                                             timeout
    1 172.16.25.2                                             timeout 
    2 172.16.25.2                                             timeout

[R7] > /ip route print 
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, B - blackhole, U - unreachable, P - prohibit 
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 4 ADo  172.16.25.1/32                     172.16.26.1             110
 5 ADo  172.16.25.2/32                     172.16.26.1             110


R2]/ip route print
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, B - blackhole, U - unreachable, P - prohibit 
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 5 ADo  172.16.25.1/32                     172.16.27.1             110
 6 ADC  172.16.25.2/32     172.16.25.2     loopback                  0
 9 ADo  172.16.25.7/32                     172.16.26.137           110


[R1] /ip route> print
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, B - blackhole, U - unreachable, P - prohibit 
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 7 ADC  172.16.25.1/32     172.16.25.1     loopback                  0
 8 ADo  172.16.25.2/32                     172.16.27.2             110
 9 ADo  172.16.25.5/32                     172.16.27.2             110
11 ADo  172.16.25.7/32                     172.16.26.7             110
3

I understood what problem