MIKROTIK - Two LANs connected with switch

Question

I have a very simple network. I have two LAN networks (192.168.2.0/24 and 192.168.3.0/24) connected via a router at each site and the routers are connected via a switch.

http://postimg.org/image/3y1uysszn/

The routers are MIKROTIK, the switch is some of the shelf equipment. I've set up all the routes, removed all the firewalls but I still can't ping from one PC to another. The strange thing is that when I use MIKROTIKs IP Scan tool, it finds all of the equipment, but when I try to ping lets say from PC at site 2, I can't get further than 172.30.2.222.

If I disable the bridge between LAN and WAN at site 2, I can (from the PC at site 2) ping to LAN IP: 192.168.3.50, which is at site 3. At the same time I can't ping to LAN IP: 192.168.2.1 from PC at site 3. If I reenable the bridge at site 2, I again can't get any further than 172.30.2.222 from site 2.

Does anyone have an idea what I am doing wrong? Is the PING somehow disabled in mikrotik routers?

Configuration:

[admin@ENG. SITE 3] >> /ip address export 
/ip address 
add address=192.168.3.1/24 comment="default configuration" interface=\ 
"ETH. 2 LAN" network=192.168.3.0 
add address=172.30.2.222/24 interface="ETH. 1 WAN" network=172.30.2.0 

[admin@ENG. SITE 3] >> ip route export 
/ip route 
add distance=1 gateway=172.30.2.221 add distance=1 dst-address=172.30.2.0/32 gateway="ETH. 1 WAN" 
add distance=1 dst-address=192.168.2.0/24 gateway="ETH. 1 WAN"

[admin@ENG. SITE 3] >> ip firewall export 
/ip firewall filter 
add chain=input comment="default configuration" disabled=yes protocol=icmp
add chain=input comment="default configuration" connection-state=established \ 
disabled=yes 
add chain=input comment="default configuration" connection-state=related \ 
disabled=yes 
add action=drop chain=input comment="default configuration" disabled=yes \ 
in-interface="ETH. 1 WAN"
add chain=forward comment="default configuration" connection-state=established \ 
disabled=yes 
add chain=forward comment="default configuration" connection-state=related \ 
disabled=yes 
add action=drop chain=forward comment="default configuration" connection-state=\ 
invalid disabled=yes 

/ip firewall nat 
add action=masquerade chain=srcnat comment="default configuration" \ 
out-interface="ETH. 1 WAN" 

[admin@ENG. SITE 2] > ip address export 
/ip address 
add address=192.168.2.1/24 comment="default configuration" interface "ETH. 2 LAN" network=192.168.2.0 
add address=172.30.2.221/24 interface="ETH. 1 WAN" network=172.30.221.0

[admin@ENG. SITE 2] > ip route export 
/ip route 
add disabled=yes distance=1 gateway=172.30.2.222 
add distance=1 dst-address=192.168.3.0/24 gateway="ETH. 1 WAN" 

[admin@ENG. SITE 2] > ip firewall export 
/ip firewall filter 
add chain=forward comment="default configuration" connection-state=e disabled=yes 
add chain=forward comment="default configuration" connection-state=r disabled=yes 
add action=drop chain=forward comment="default configuration" connec invalid disabled=yes 
/ip firewall nat 
add action=masquerade chain=srcnat comment="default configuration" \ 
out-interface="ETH. 1 WAN"

Answer 1

Your static routes are invalid.

You need to delete all your static routes from both sites and add the following routes on each router:

Run on SITE2:
/ip route add dst-address=192.168.3.0/24 gateway=172.30.2.222

Run on SITE3:
/ip route add dst-address=192.168.2.0/24 gateway=172.30.2.221

Also the bridges are unnecessary so delete them too.
You sould also delete the masquerade rule in Firewall > NAT. You don't need that since you have static routes between the routers and both networks can reach each other.

The rest of the firewall rules look OK so enabling them shouldn't interfere.