Hedge 145: Roundtable on Professional Liability

By Russ | 1 September 2022 | Comments Off on Hedge 145: Roundtable on Professional Liability

The software world is known for overdue projects, costs overrun, lots of defects, and lots of failure all the way around. Many other engineering fields have stricter requirements to take on projects and liability insurance driving correct practice and care. The networking world, and the larger IT world, however, has neither of these things. Does this make IT folks less likely to “do the right thing,” or is the self-regulation we have today enough? Join Tom Ammon, Eyvonne Sharp, and Russ White as they discuss the possibilities of professional liability in information technology.

Hedge 144: IPv6 Lessons Learned

By Russ | 25 August 2022 | Comments Off on Hedge 144: IPv6 Lessons Learned

We don’t often do a post-mortem on the development and deployment of new protocols … but here at the Hedge we’re going to brave these deep waters to discuss some of the lessons we can learn from the development and deployment of IPv6, especially as they apply to design and deployment cycles in the “average network” (if there is such at thing). Join us as James Harr, Tom Ammon, and Russ White consider the lessons we can learn from IPv6’s checkered history.

Hedge 143: Being Prepared to be Laid Off with Giovanni Messina

By Russ | 18 August 2022 | Comments Off on Hedge 143: Being Prepared to be Laid Off with Giovanni Messina

Forty years ago there was an implied loyalty between companies and employees—but that world is long gone. As much as companies would like their employees to be loyal, layoff culture has crept into every corner of the modern world, especially as we move into an economic downturn. Giovanni Messina joins Russ White and Tom Ammon to talk about being prepared to be laid off, including such topics as being financially prepared, building skills for the long term, and finding community.

Hedge 142: George Michaelson and the Pace of IPv6 Deployment

By Russ | 10 August 2022 | Comments Off on Hedge 142: George Michaelson and the Pace of IPv6 Deployment

IPv6 is still being deployed, years after the first world IPv6 day, even more years after its first acceptance as an Internet standard by the IETF. What is taking so long? George Michaelson (APNIC) joins Tom Ammon and Russ White on this episode of the Hedge to discuss the current pace of IPv6 deployment, where there are wins, and why things might be moving more slowly in other areas.

Hedge 141: Improving WAN Router Performance

By Russ | 3 August 2022 | Comments Off on Hedge 141: Improving WAN Router Performance

Wide area networks in large-scale cores tend to be performance choke-points—partially because of differentials between the traffic they’re receiving from data center fabrics, campuses, and other sources, and the availability of outbound bandwidth, and partially because these routers tend to be a focal point for policy implementation. Rachee Singh joins Tom Ammon, Jeff Tantsura, and Russ White to discuss “Shoofly, a tool for provisioning wide-area backbones that bypasses routers by keeping traffic in the optical domain for as long as possible.”

Hedge 140: Aftab S and RIR Policies

By Russ | 28 July 2022 | Comments Off on Hedge 140: Aftab S and RIR Policies

Regional Internet Registries (RIRs) assign and manage numbered Internet resources like IPv4 address space, IPv6 address, and AS numbers. If you ever try to get address space or an AS number, though, it might seem like the policies the RIRs use to determine what kin and scale of resources you can get are a bit arbitrary (or even, perhaps, odd). Aftab Siddiqui joins Russ White and Tom Ammon to explain how and why these policies are set the way they are.

Hedge 139: Open Source Supply Chain Security

By Russ | 20 July 2022 | Comments Off on Hedge 139: Open Source Supply Chain Security

There is a rising concern about the security of open source projects—particularly in terms of open source software supply chain. Alistair Woodman, who works closely with multiple open source software projects, joins Tom and Russ to discuss the reality of securing open source projects. The final answer? Essentially, buyer—or in the case of open source software, user—beware.

Hedge 138: The Robustness Principle

By Russ | 13 July 2022 | Comments Off on Hedge 138: The Robustness Principle

Most network engineers take it as a “given” that the robustness principle is the “right way” to build protocols and networks—”be conservative in what you send, and liberal in what you receive.” The idea behind the robustness principle is that implementations should implement specifications as accurately as possible, but they should also accept malformed and otherwise erroneous data, process the best they can, and drop the bits they cannot process. This should allow the network to operate correctly in the face of defects and other failures. A recent draft, draft-iab-protocol-maintenance/, challenges the assumptions behind the robustness principle. Join Tom and Russ as they discuss the robustness principle and its potential problems.

Hedge 137: Old FRR Defects

By Russ | 6 July 2022 | Comments Off on Hedge 137: Old FRR Defects

Zero-day defects exist in every projects, whether they are open or closed source. John Fraizer and Alistair Woodman join Tom Ammon and Russ White to discuss an old defect John found in the FRR code, the history of this defect, and the problems inherent in finding and resolving defects in large, diverse code bases.

Hedge 136: The IPv6 ULA Mess

By Russ | 29 June 2022 | Comments Off on Hedge 136: The IPv6 ULA Mess

IPv6’s designers built the concept of Unique Local Addresses, or ULAs, into the addressing architecture to make network address translation unnecessary for IPv6 deployments. As with many other plans of mice and men, however, the unintended consequences of what is a good idea tend to get in the way. Nick Buraglio joing Eyvonne Sharp, Tom Ammon, and Russ White to discuss the many problems of IPv6 ULA, why it isn’t practical in most network deployments, and the larger question of how standards bodies sometimes fail to consider the unintended consequences of a good idea.