# netlab 25.09: IPv6 RA, Link Impairments, and Performance Gains

DevFeed: [netlab 25.09: IPv6 RA, Link Impairments, and Performance Gains](<https://devfeed.tech/articles/netlab-25-09-ipv6-ra-link-impairments-and-performance-gains-11243.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2025/09/netlab-25-09/>)

Published: 2025-09-08T07:14:00Z

Content type: release

Language: en

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

Topics: [releases](<https://devfeed.tech/topics/releases.md>), [networking](<https://devfeed.tech/topics/networking.md>), [Linux](<https://devfeed.tech/topics/linux.md>), [Containers](<https://devfeed.tech/topics/containers.md>), [BGP](<https://devfeed.tech/topics/bgp.md>), [evpn](<https://devfeed.tech/topics/evpn.md>), [IS-IS](<https://devfeed.tech/topics/is-is.md>)

Tags: [bgp](<https://devfeed.tech/tags/bgp.md>), [cisco](<https://devfeed.tech/tags/cisco.md>), [container](<https://devfeed.tech/tags/container.md>), [evpn](<https://devfeed.tech/tags/evpn.md>), [graphs](<https://devfeed.tech/tags/graphs.md>), [ipv6](<https://devfeed.tech/tags/ipv6.md>), [is-is](<https://devfeed.tech/tags/is-is.md>), [linux](<https://devfeed.tech/tags/linux.md>), [netlab](<https://devfeed.tech/tags/netlab.md>), [performance](<https://devfeed.tech/tags/performance.md>), [release](<https://devfeed.tech/tags/release.md>), [router](<https://devfeed.tech/tags/router.md>), [ssh](<https://devfeed.tech/tags/ssh.md>), [yaml](<https://devfeed.tech/tags/yaml.md>)

## AI overview

The netlab 25.09 release adds Linux netem-based link impairment, configurable IPv6 Router Advertisement parameters, a files plugin, Nokia SR-OS container support, and support for topologies tested at approximately 3,000 devices. It also adds EVPN, debugging, reporting, graphing, and performance improvements.

## Source excerpt

netlab release 25.09 includes: Link impairment (implemented with Linux netem queuing discipline) defined in lab topology or configured/controlled with the netlab tc command Configurable IPv6 Router Advertisement parameters The files plugin to store the content of short files (including custom configuration templates) directly in the lab topology Support for Nokia SR-OS container (SR-SIM) Support for very large topologies (tested so far: approximately 3000 lab devices) But wait, there's more (as always): Read more ...