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"published_at": "2025-05-30T06:20:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab867d56f8", "title": "Dear ArubaCX, VXLAN VNI Has 24 Bits", "url": "https://blog.ipspace.net/2025/05/arubacx-vxlan-vni-arp/?utm_source=atom_feed", "published_at": "2025-05-29T05:55:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab875ccf77", "title": "Worth Reading: Practical Advice for Engineers", "url": "https://blog.ipspace.net/2025/05/worth-reading-practical-advice-engineers/?utm_source=atom_feed", "published_at": "2025-05-28T05:48:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8778f88c", "title": "ChatGPT Strikes Again: IS-IS on Unnumbered Interfaces 🤦‍♂️", "url": "https://blog.ipspace.net/2025/05/chatgpt-isis-unnumbered/?utm_source=atom_feed", "published_at": "2025-05-27T06:36:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab88028173", "title": "Repost: On the Advantages of XML", "url": "https://blog.ipspace.net/2025/05/repost-xml-advantages/?utm_source=atom_feed", "published_at": 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"id": "01a0874b-e030-73ce-a37d-aeab89d90c08", "title": "Vibe Coding netlab Lab Topology with ChatGPT", "url": "https://blog.ipspace.net/2025/05/chatgpt-netlab-topology/?utm_source=atom_feed", "published_at": "2025-05-19T05:08:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8a8fafd0", "title": "Response: CLI Is an API", "url": "https://blog.ipspace.net/2025/05/response-cli-api/?utm_source=atom_feed", "published_at": "2025-05-14T06:32:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8adc08c7", "title": "netlab 2.0.0: Hosts, Bridges, and SRv6", "url": "https://blog.ipspace.net/2025/05/netlab-2-0-0/?utm_source=atom_feed", "published_at": "2025-05-12T07:05:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8b02b33e", "title": "Forwarding Packets Across a Network", "url": "https://blog.ipspace.net/2025/05/forwarding-packets-across-network/?utm_source=atom_feed", "published_at": "2025-05-08T06:20:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8b59a61c", "title": "Screen Scraping in 2025", "url": "https://blog.ipspace.net/2025/05/screen-scraping-2025/?utm_source=atom_feed", "published_at": "2025-05-07T09:32:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8be45733", "title": "OSPF Loop Prevention with Area Range Summary LSAs", "url": "https://blog.ipspace.net/2025/05/ospf-area-range-loop-prevention/?utm_source=atom_feed", "published_at": "2025-05-06T06:17:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8bea35c8", "title": "OSPF Summary LSA Loop Prevention", "url": "https://blog.ipspace.net/2025/04/ospf-summary-lsa-loop-prevention/?utm_source=atom_feed", "published_at": "2025-04-30T06:17:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8c6ccb7b", "title": "Breaking APIs or Data Models Is a Cardinal Sin", "url": "https://blog.ipspace.net/2025/04/api-data-model-contract/?utm_source=atom_feed", "published_at": "2025-04-29T06:15:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8ccf711f", "title": "ChatGPT on OSPF Area Ranges and Summary LSAs", "url": "https://blog.ipspace.net/2025/04/chatgpt-ospf-area-ranges/?utm_source=atom_feed", "published_at": "2025-04-28T05:46:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8db0c6eb", "title": "Switching, Routing, and Bridging Terminology", "url": "https://blog.ipspace.net/2025/04/bridging-routing-switching-terminology/?utm_source=atom_feed", "published_at": "2025-04-25T05:45:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8e930fb5", "title": "Worth Reading: BGP Unnumbered in 2025", "url": "https://blog.ipspace.net/2025/04/worth-reading-bgp-unnumbered-2025/?utm_source=atom_feed", "published_at": "2025-04-24T06:06:00+00:00" }, { "id": "01a0874b-e030-73ce-a37d-aeab8f7358c1", "title": "How ARP Killed a Static Route", "url": "https://blog.ipspace.net/2025/04/static-routes-arp/?utm_source=atom_feed", "published_at": "2025-04-22T05:55:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a065916b733a", "title": "Rant: You Should Have Written a Book", "url": "https://blog.ipspace.net/2025/04/rant-should-have-written-a-book/?utm_source=atom_feed", "published_at": "2025-04-17T06:07:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a065919ee5d6", "title": "netlab: Execute a Command on Multiple Devices", "url": "https://blog.ipspace.net/2025/04/netlab-exec/?utm_source=atom_feed", "published_at": "2025-04-16T05:47:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a06591b2d55a", "title": "Response: Peer-to-Peer Communication in IPv6 World", "url": "https://blog.ipspace.net/2025/04/response-peer-to-peer-apps-ipv6/?utm_source=atom_feed", "published_at": "2025-04-15T05:23:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a065925ffdf7", "title": "Response: NAT Traversal Mess", "url": "https://blog.ipspace.net/2025/04/response-nat-traversal/?utm_source=atom_feed", "published_at": "2025-04-10T06:00:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a06592ff4d43", "title": "iBGP Local-AS Next Hop Requirements", "url": "https://blog.ipspace.net/2025/04/ibgp-local-as-details/?utm_source=atom_feed", "published_at": "2025-04-08T06:08:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a06593a69d7d", "title": "Transitioning into Networking, 2025 Edition", "url": "https://blog.ipspace.net/2025/04/transition-into-networking/?utm_source=atom_feed", "published_at": "2025-04-04T06:20:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a06594620a36", "title": "ARP Challenges in EVPN/VXLAN Symmetric IRB", "url": "https://blog.ipspace.net/2025/04/evpn-symmetric-irb-arp/?utm_source=atom_feed", "published_at": "2025-04-03T06:30:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a065955f1027", "title": "Comparing IP and CLNP: Local (Node) Multihoming", "url": "https://blog.ipspace.net/2025/04/comparing-ip-clnp-multihoming/?utm_source=atom_feed", "published_at": "2025-04-02T07:21:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a06595fddc2a", "title": "Worth Reading: Why Quantum Crypto is Bollocks", "url": "https://blog.ipspace.net/2025/04/worth-reading-quantum-crypto-bollocks/?utm_source=atom_feed", "published_at": "2025-04-01T06:13:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a06596e9ac51", "title": "Passive BGP Sessions", "url": "https://blog.ipspace.net/2025/03/bgp-labs-passive-sessions/?utm_source=atom_feed", "published_at": "2025-03-28T05:40:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a06597452803", "title": "Response: Any-to-Any Connectivity in the Internet", "url": "https://blog.ipspace.net/2025/03/response-end-to-end-connectivity/?utm_source=atom_feed", "published_at": "2025-03-27T06:45:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659778713a", "title": "Worth Reading: On Writing", "url": "https://blog.ipspace.net/2025/03/worth-reading-on-writing/?utm_source=atom_feed", "published_at": "2025-03-26T07:14:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659872935a", "title": "netlab 1.9.6: Static Routes to Default Gateways", "url": "https://blog.ipspace.net/2025/03/netlab-1-9-6-gateway/?utm_source=atom_feed", "published_at": "2025-03-25T07:25:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a06598f84a60", "title": "IPv6 and the Revenge of the Stupid Bridges", "url": "https://blog.ipspace.net/2025/03/stupid-bridges-strike-again/?utm_source=atom_feed", "published_at": "2025-03-24T07:08:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a06599b59615", "title": "Routed Interfaces on Layer-3 Switches and Internal VLANs", "url": "https://blog.ipspace.net/2025/03/routed-interfaces-layer-3-switches/?utm_source=atom_feed", "published_at": "2025-03-20T07:16:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659ab016bd", "title": "Comparing IP and CLNP: Network State Summarization", "url": "https://blog.ipspace.net/2025/03/comparing-ip-clnp-state-summarization/?utm_source=atom_feed", "published_at": "2025-03-19T06:59:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659b8c96a0", "title": "Worth Reading: Standards for ANSI Escape Codes", "url": "https://blog.ipspace.net/2025/03/worth-reading-standards-ansi-escape-codes/?utm_source=atom_feed", "published_at": "2025-03-18T07:03:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659bfa70c7", "title": "Arista EOS Spooky Action at a Distance", "url": "https://blog.ipspace.net/2025/03/arista-spooky-action-distance/?utm_source=atom_feed", "published_at": "2025-03-17T08:10:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659c967753", "title": "Lab: IS-IS Designated Router Election", "url": "https://blog.ipspace.net/2025/03/isis-dis-election/?utm_source=atom_feed", "published_at": "2025-03-13T07:03:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659cce9e24", "title": "The Linux Bridge MTU Hell", "url": "https://blog.ipspace.net/2025/03/linux-bridge-mtu-hell/?utm_source=atom_feed", "published_at": "2025-03-11T07:11:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659d109b73", "title": "Worth Reading: Traffic Steering into LSPs", "url": "https://blog.ipspace.net/2025/03/lsp-traffic-steering/?utm_source=atom_feed", "published_at": "2025-03-10T07:12:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659d95ce6b", "title": "netlab 1.9.5: New Cumulus Linux(NVUE) and Junos Features", "url": "https://blog.ipspace.net/2025/03/netlab-1-9-5-junos-cumulus/?utm_source=atom_feed", "published_at": "2025-03-07T06:52:00+00:00" }, { "id": "01a0874b-e031-73bf-bda6-a0659e2cebb9", "title": "Comparing IP and CLNP: Reaching Off-Subnet Nodes", "url": "https://blog.ipspace.net/2025/03/comparing-ip-clnp-off-subnet-nodes/?utm_source=atom_feed", "published_at": "2025-03-05T07:08:00+00:00" } ] posts Claim your blog

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2025

Changing Colors and Line Styles in netlab Graphs original ↗

22 Sept 2025

Pleasant Surprise: Google AI Overview original ↗

20 Sept 2025

Use Additional BGP Paths for IBGP Load Balancing original ↗

19 Sept 2025

Arista EOS Hates a Routing Instance with No Interfaces original ↗

18 Sept 2025

SwiNOG 40: When a Routing Control Functions Is Too Fresh original ↗

17 Sept 2025

Updated: netlab Network Topology Graphs original ↗

16 Sept 2025

[FATAL] Ansible Release 12.0 Breaks netlab Jinja2 Templates original ↗

14 Sept 2025

Lab: Running IS-IS over IPv4 Unnumbered and IPv6 LLA Interfaces original ↗

12 Sept 2025

The Curious Case of 'ip host' Configuration Command original ↗

11 Sept 2025

Labbing Network Technology Details with netlab original ↗

10 Sept 2025

SwiNOG 40: Reliability of High-Speed Transceivers original ↗

9 Sept 2025

netlab 25.09: IPv6 RA, Link Impairments, and Performance Gains original ↗

8 Sept 2025

How Many Lab Devices Can netlab Handle?original ↗

4 Sept 2025

SwiNOG 40: Submarine Cables original ↗

3 Sept 2025

Netlab: The Fastest Way to Build Network Labs original ↗

1 Sept 2025

iBGP Local-AS Route Propagation original ↗

29 Aug 2025

Network Automation Reality Check with William Collins original ↗

28 Aug 2025

SwiNOG 40: Application-Based Source Routing with SRv6 original ↗

27 Aug 2025

EVPN Designs: Layer-3 Inter-AS Option A original ↗

26 Aug 2025

When Switches Flood LLDP Traffic original ↗

25 Aug 2025

ArubaCX Decides When You're Done Changing a BGP Routing Policy original ↗

22 Aug 2025

Configuring BGP Community Propagation is Confusing original ↗

21 Aug 2025

SwiNOG 40: Trustworthy Network Automation original ↗

20 Aug 2025

Fun Reading: AI: Great Expectations original ↗

12 Aug 2025

BGP Community Propagation on Cisco IOS/XE: The 90's Called original ↗

11 Aug 2025

MUST READ: Storage Devices and Latency original ↗

4 Aug 2025

Fun Reading: Who is LLM?original ↗

28 Jul 2025

ArubaCX: When BGP Soft Reconfiguration Becomes a No-Op original ↗

25 Jul 2025

Ultra Ethernet: Reinventing X.25 original ↗

23 Jul 2025

Always Check Your Tests Against Faulty Inputs original ↗

21 Jul 2025

Cisco IOS/XE Hates Redistributed Static IPv6 Routes original ↗

18 Jul 2025

netlab 25.07: Summaries and Confederations original ↗

15 Jul 2025

Dual-Stack Common-Services VRF Confuses Aruba CX original ↗

11 Jul 2025

Worth Reading: The Secret Rules of the Terminal original ↗

9 Jul 2025

Expanding a Running Netlab Topology original ↗

7 Jul 2025

Worth Reading: Expert Generalists original ↗

3 Jul 2025

Molly-Guard: a Lifesaver on a Ubuntu Server original ↗

2 Jul 2025

IS-IS 3-Way Handshake and the Power of SHOULD original ↗

1 Jul 2025

Start netlab Tools without Changing Topology File original ↗

30 Jun 2025

SwiNOG 40: A Day of Awesomeness original ↗

26 Jun 2025

Testing OSPF Device Configurations original ↗

25 Jun 2025

Quality of OSPFv2 NSSA Implementations original ↗

24 Jun 2025

Static Routes in netlab Lab Topologies original ↗

23 Jun 2025

Network Digital Twins: Between PowerPoint and Reality original ↗

19 Jun 2025

Dear Vendors, EVPN Route Attributes Matter original ↗

18 Jun 2025

netlab 25.06: Fixing Nokia SR-OS Configuration Templates original ↗

16 Jun 2025

Finding Source Routing Paths original ↗

13 Jun 2025

ArubaCX Cannot Count When Dealing with VXLAN original ↗

12 Jun 2025

netlab 2.0: Routers, Hosts, Gateways and Bridges original ↗

11 Jun 2025

Interesting: Juniper MX and Jumbo Frames original ↗

10 Jun 2025

Publishing Content as an Introvert original ↗

9 Jun 2025

Finding End-to-End Paths: Topology and Endpoints original ↗

6 Jun 2025

Weird: Ports on Linux Bridge Are Stuck original ↗

5 Jun 2025

Where Are the NETCONF/YANG Tools?original ↗

4 Jun 2025

Interesting: Bootstrapping HTTPS original ↗

3 Jun 2025

Cumulus Linux (As We Know It) Is Gone original ↗

2 Jun 2025

Multi-Layer Switching and Tunneling original ↗

30 May 2025

Dear ArubaCX, VXLAN VNI Has 24 Bits original ↗

29 May 2025

Worth Reading: Practical Advice for Engineers original ↗

28 May 2025

ChatGPT Strikes Again: IS-IS on Unnumbered Interfaces 🤦‍♂️original ↗

27 May 2025

Repost: On the Advantages of XML original ↗

26 May 2025

Video: netlab Introduction by Ethan Banks original ↗

23 May 2025

Response: True Unnumbered Interfaces original ↗

22 May 2025

Amazing Speed of Bug Fixes in Nokia SR Linux original ↗

21 May 2025

netlab 2.0: Use Custom Bridges on Multi-Access Links original ↗

20 May 2025

Vibe Coding netlab Lab Topology with ChatGPT original ↗

19 May 2025

Response: CLI Is an API original ↗

14 May 2025

netlab 2.0.0: Hosts, Bridges, and SRv6 original ↗

12 May 2025

Forwarding Packets Across a Network original ↗

8 May 2025

Screen Scraping in 2025 original ↗

7 May 2025

OSPF Loop Prevention with Area Range Summary LSAs original ↗

6 May 2025

OSPF Summary LSA Loop Prevention original ↗

30 Apr 2025

Breaking APIs or Data Models Is a Cardinal Sin original ↗

29 Apr 2025

ChatGPT on OSPF Area Ranges and Summary LSAs original ↗

28 Apr 2025

Switching, Routing, and Bridging Terminology original ↗

25 Apr 2025

Worth Reading: BGP Unnumbered in 2025 original ↗

24 Apr 2025

How ARP Killed a Static Route original ↗

22 Apr 2025

Rant: You Should Have Written a Book original ↗

17 Apr 2025

netlab: Execute a Command on Multiple Devices original ↗

16 Apr 2025

Response: Peer-to-Peer Communication in IPv6 World original ↗

15 Apr 2025

Response: NAT Traversal Mess original ↗

10 Apr 2025

iBGP Local-AS Next Hop Requirements original ↗

8 Apr 2025

Transitioning into Networking, 2025 Edition original ↗

4 Apr 2025

ARP Challenges in EVPN/VXLAN Symmetric IRB original ↗

3 Apr 2025

Comparing IP and CLNP: Local (Node) Multihoming original ↗

2 Apr 2025

Worth Reading: Why Quantum Crypto is Bollocks original ↗

1 Apr 2025

Passive BGP Sessions original ↗

28 Mar 2025

Response: Any-to-Any Connectivity in the Internet original ↗

27 Mar 2025

Worth Reading: On Writing original ↗

26 Mar 2025

netlab 1.9.6: Static Routes to Default Gateways original ↗

25 Mar 2025

IPv6 and the Revenge of the Stupid Bridges original ↗

24 Mar 2025

Routed Interfaces on Layer-3 Switches and Internal VLANs original ↗

20 Mar 2025

Comparing IP and CLNP: Network State Summarization original ↗

19 Mar 2025

Worth Reading: Standards for ANSI Escape Codes original ↗

18 Mar 2025

Arista EOS Spooky Action at a Distance original ↗

17 Mar 2025

Lab: IS-IS Designated Router Election original ↗

13 Mar 2025

The Linux Bridge MTU Hell original ↗

11 Mar 2025

Worth Reading: Traffic Steering into LSPs original ↗

10 Mar 2025

netlab 1.9.5: New Cumulus Linux(NVUE) and Junos Features original ↗

7 Mar 2025

Comparing IP and CLNP: Reaching Off-Subnet Nodes original ↗

5 Mar 2025