# Quality of OSPFv2 NSSA Implementations

DevFeed: [Quality of OSPFv2 NSSA Implementations](<https://devfeed.tech/articles/quality-of-ospfv2-nssa-implementations-11206.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2025/06/ospf-nssa-implementations/>)

Published: 2025-06-24T05:44:00Z

Content type: comparison

Language: en

Sources: [ipSpace.net blog](<https://devfeed.tech/sources/ipspace-net-blog.md>)

Topics: [Network](<https://devfeed.tech/topics/network.md>), [configuration](<https://devfeed.tech/topics/configuration.md>), [Cisco](<https://devfeed.tech/topics/cisco.md>), [dell](<https://devfeed.tech/topics/dell.md>), [Linux](<https://devfeed.tech/topics/linux.md>), [GitHub](<https://devfeed.tech/topics/github.md>)

Tags: [cisco](<https://devfeed.tech/tags/cisco.md>), [configuration](<https://devfeed.tech/tags/configuration.md>), [dell](<https://devfeed.tech/tags/dell.md>), [github](<https://devfeed.tech/tags/github.md>), [integration](<https://devfeed.tech/tags/integration.md>), [linux](<https://devfeed.tech/tags/linux.md>), [netlab](<https://devfeed.tech/tags/netlab.md>), [network](<https://devfeed.tech/tags/network.md>), [ospf](<https://devfeed.tech/tags/ospf.md>), [quality](<https://devfeed.tech/tags/quality.md>), [tests](<https://devfeed.tech/tags/tests.md>)

## AI overview

The article evaluates OSPFv2 and OSPFv3 stub-area and NSSA implementations using netlab integration tests. It reports that Junos and the latest FRR release passed all tests, while several other platforms lacked NSSA range support or had configuration limitations and defects.

## Source excerpt

A few weeks ago, we added OSPF areas functionality to netlab. In the next release1, you'll be able to configure stub areas, NSSA areas, inter-area route summarization and filtering (OSPF ranges), and summarization of NSSA type-7 prefixes for OSPFv2 and OSPFv3. OSPFv2 (defined in RFC 2328) is 27 years old, and NSSA functionality (RFC 3101) was last touched 22 years ago. One would hope the implementations in network devices are mature and feature-complete. Yeah, keep dreaming 🤦♂. Read more ...