Hello,

I want to use OSPF in my network:

CCR
Vlan6: IP 192.168.6.254/24 (port sfp+1)
SFP+1 SFP+2
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Dell Powerconnect Dell Powerconnect
8024 port Te1/1/4 8024 port Te1/1/4
port Te1/1/5 ------LAG-------port Te1/1/5
Vlan6 ip:192.168.6.251/24 Vlan6 ip:192.168.6.252/24
switchport mode trunk
ospf area 0.0.0.0

I can show the 2 Dell switch in ospf neighbor
but not on the mikrotik

add address=192.168.7.254/16 interface=loopbackopsf network=192.168.0.0
add address=192.168.6.254/24 interface=interco network=192.168.6.0

/interface bridge
add name=loopbackopsf
/interface ethernet
set [ find default-name=sfp-sfpplus1 ] name=sfp-plus1
set [ find default-name=sfp-sfpplus2 ] name=sfp-plus2
/interface vlan
add interface=sfp-plus1 l2mtu=1586 name=interco vlan-id=6

/routing ospf instance
set [ find default=yes ] name=backbone redistribute-bgp=as-type-1 redistribute-connected=as-type-1 router-id=192.168.7.254
/routing ospf interface
add interface=interco network-type=broadcast
/routing ospf network
add area=backbone network=192.168.7.0/24

/routing ospf neighbor> print

[admin@MikroTik] /routing ospf neighbor>

Nobody ?

Your devices' interfaces addresses are in 192.168.6.0/24 network, but backbone network at MT set as 192.168.7.0/24. If it is not misprint, you should change backbone network.

add address=192.168.7.254/16 interface=loopbackopsf network=192.168.0.0
add address=192.168.6.254/24 interface=interco network=192.168.6.0

You typically add a /32 address to a loopback interface, In this case you are adding a /16 address which would include all 192.168.x.x addresses which doesn't look good.