OSPF Summarization

RouterOS Beginner Basics
1

Hi everybody,

I have a summary for an OSPF process. The summary is between a router in backbone area and a router in a area 2. Despite the configuration of the AREA RANGE under OSPF configuration for backbone router, the router in area 2 still receiving the single subnets

Backbone router

/routing ospf area
add area-id=0.0.0.1 name=areawifi1
add area-id=0.0.0.3 name=areawifi3
add area-id=0.0.0.2 name=areawifi2
add area-id=0.0.0.4 name=areawifi4
add area-id=0.0.0.5 name=areawifi5
/routing ospf instance
set [ find default=yes ] router-id=10.77.0.2
/routing ospf area range
add area=areawifi2 range=10.77.0.0/16
add area=areawifi2 range=10.74.0.0/16
/routing ospf interface
add comment="salino hello 1 sec" interface=ether6 network-type=broadcast
/routing ospf nbma-neighbor
add address=10.77.0.1
/routing ospf network
add area=backbone network=10.77.0.0/29
add area=backbone network=10.74.4.0/29
add area=areawifi1 network=10.77.0.8/29
add area=areawifi2 network=10.77.0.16/29
add area=areawifi3 network=10.77.0.24/29
add area=areawifi4 network=10.77.0.32/29
add area=areawifi4 network=10.77.0.40/29
add area=backbone network=10.76.14.0/24

Area 2 router

DST-ADDRESS PREF-SRC GATEWAY DISTANCE

0 ADo 0.0.0.0/0 10.77.0.17 110
1 S 0.0.0.0/0 10.77.0.17 200
2 A S ;;; VOIP - SEDE
10.64.0.0/22 10.77.0.17 110
3 A S ;;; VOIP - RADIO
10.64.4.0/22 10.77.0.17 110
4 A S ;;; VOIP - VM
10.64.8.0/22 10.77.0.17 110
5 ADo 10.74.8.0/22 10.77.0.17 110
6 ADC 10.74.12.0/22 10.74.12.1 ether2 0
7 ADo 10.74.16.0/22 10.77.0.17 110
8 ADo 10.74.20.0/22 10.77.0.17 110
9 ADo 10.74.24.0/22 10.77.0.17 110
10 ADC 10.76.8.2/32 10.76.8.1 0
11 ADC 10.76.8.3/32 10.76.8.1 0
12 ADC 10.76.8.4/32 10.76.8.1 0
13 ADC 10.76.8.6/32 10.76.8.1 0
14 ADC 10.76.8.8/32 10.76.8.1 0
15 ADC 10.76.8.9/32 10.76.8.1 0
16 ADC 10.76.8.10/32 10.76.8.1 0
17 ADC 10.76.8.11/32 10.76.8.1 0
18 ADC 10.76.8.13/32 10.76.8.1 0
19 ADo 10.77.0.0/29 10.77.0.17 110
20 ADo 10.77.0.8/29 10.77.0.17 110
21 ADC 10.77.0.16/29 10.77.0.20 ether1 0
22 ADo 10.77.0.24/29 10.77.0.17 110
23 ADo 10.77.0.32/29 10.77.0.17 110
24 ADo 10.77.0.40/29 10.77.0.17 110

Any idea what I'm missing?

Thanks!

2

I’m assuming that the area 2 router is not an ABR with one interface in the backbone area…

Look at those single prefixes - almost certainly they’re type external routes. Aggregation (area range) only applies to natural “interior” routes in OSPF.
If some other router redistributes prefixes from static/connected/bgp/rip/other ospf process then these redistributed routes bypass your aggregation entirely.

3

Thanks for your reply. It sounds more as a Mikrotik limitation, is it right? There is any way to create a null0 as summary and redistribute it?