This lab demonstrates how to configure and verify OSPF stub area types on MikroTik RouterOS v7. Below is the topology we’ll use for the configuration:
OSPF Network Scenario:
Lab Overview
We will configure the following OSPF stub area types:
- Stub Area: Restrict Type 5 LSAs (external routes).
- Totally Stubby Area: Restrict both Type 3 (inter-area) and Type 5 LSAs.
- Not-So-Stubby Area (NSSA): Restrict Type 5 LSAs while allowing ASBRs.
- Totally NSSA: Restrict both Type 3 and Type 5 LSAs, but permit ASBRs.
1. Configuring Area 1 as a Stub Area
In a Stub Area:
- Type 5 LSAs (External LSAs) are not allowed.
- Type 3 LSAs (Summary LSAs) remain visible.
- ASBRs are not allowed in the area.
Configuration on Router R2:
[admin@R2] > /routing ospf area set [find where name="area1"] type=stub
[admin@R2] > /routing ospf area print
Flags: D - dynamic
Columns: NAME, TYPE, ID
# NAME TYPE ID
0 area1 stub 0.0.0.1
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