Problem with GRE-tunnel between Cisco and Mikrotik

RouterOS Forwarding Protocols
1

We need to change Cisco 1812 to Mikrotik RB962UiGS-5HacT2HnT. In central office installed Cisco 2811. When we used Cisco1812-Cisco2811 GRE-tunnel worked fine. I make configuration for mikrotik in central office, GRE worked fine. Then I change config of interface, which connect to Internet (in remote office used PPPoE) and sent mikrotik to remote office. Now in remote office internet is working, but GRE don't up. I removed almost all config, left only nessesary config for GRE, but it still not working. I need help to find the reason!

Cisco
interface Tunnel2
ip address 10.231.0.13 255.255.255.252
ip mtu 1476
keepalive 5 3
tunnel source 195.222.149.228
tunnel destination 91.144.167.93

Mikrotik
[admin@ICS-Izhevsk-Mik] /interface gre> exp
add keepalive=5s,3 local-address=91.144.167.93 mtu=1476 name=gre-tunnel2 remote-address=195.222.149.228
[admin@ICS-Izhevsk-Mik] /ip address> exp
add address=10.231.0.14/30 interface=gre-tunnel2 network=10.231.0.12

mar/11/2020 16:28:33 by RouterOS 6.46.4
software id = 9VHL-URHY

model = RB962UiGS-5HacT2HnT
serial number = BEC40AC7C464

2

Seems like the config side is ok, what I’ll suggest you to check are two things, are you able to ping the remote tunnel destination from the Mikrotik / cisco? if that doesn’t work, you’ll need to check your routing table, if it works → do you have some firewall rules configured at the Mikrotik side?