Latest posts
InfiniBand in AI Fabrics: What Ethernet Is Borrowing
InfiniBand against RoCE and Ultra Ethernet, from kernel headers, datasheets and Meta’s SIGCOMM paper: credits, LIDs, radix, and SHARP’s 2x ceiling.
ASA Twice NAT for a Partner VPN: Hide Both Ends in One Rule
One ASA twice NAT rule hides both ends of a partner IPsec VPN. Built in CML on ASAv 9.23, proven by a…
Run eBGP Everywhere: What OSPF, EIGRP and iBGP Actually Cost in the Campus and the Data Centre
Cisco recommends eBGP for the campus and an IGP for the data centre, four months apart. I counted what each design costs,…
MAC Randomisation vs MAB: Cisco’s Detection Regex Also Matches Your Containers
Cisco’s regex for spotting randomised MAC addresses is provably exact, and it enumerates the whole IEEE 802c local address plan. It also…
Foundations, Part 3: Complex Numbers, Gaussian Integers, and Where Unique Factorisation Breaks
Chapter 3 of my 2006 first-year lecture notes, translated and checked by running it. The classification of Gaussian primes holds exhaustively; seven…
Foundations, Part 2: Induction, Congruences, and the Arithmetic Under RSA
My first-year lecture notes from 2006, chapter 2: induction, combinatorics, congruences and finite fields, ending at RSA and Diffie-Hellman. Every worked example…
Foundations, Part 1: Logic, Proof, and What Mathematics Is For
My first-year lecture notes from 2006, written up at last: logic, proof and truth tables. Plus the ten historical claims in them…
Why nbn Chose Amazon Leo Over Starlink: The Criteria Were Published in 2023
nbn named its LEO criteria in June 2023: price certainty, sovereignty, local support. Starlink structurally fails two of them. What the FOI…
Amazon Leo in Australia: nbn’s 600 ms Problem Is Ending, Slowly
nbn is retiring Sky Muster for Amazon Leo. The orbital maths behind the latency claim, the FCC waiver hanging over the 2027…
Post-Quantum Cryptography and Australia’s 2030 Deadline: What It Means for Your Network
ASD gives Australia until 2030 to retire RSA, DH, ECDH and ECDSA, five years ahead of NIST. What PQC is, and what…