Proactive Network Configuration Validation with Batfish – NANOG (2015) Presentation

Proactive Network Configuration Validation with Batfish

Batfish is an open-source network configuration analysis tool in active development produced jointly by researchers at University of California, Los Angeles; University of Southern California; and Microsoft Research. Though its individual modules have various applications, its primary purpose is to detect bugs in network configurations. Batfish takes as input a set of network configurations, and an environment, which consists of a set of (in)active links and a set of external BGP advertisements. Users are able to ask customized queries about the control plane using Batfish’s domain-specific query language e.g. whether all loopback addresses are being advertised into OSPF, or whether all route policies attached to eBGP neighbors apply a particular community to incoming routes. Batfish also is able to compute the convergent data plane for a network, which provides further query facilities. Given the data plane, users can employ an off-the-shelf data plane checker or use Batfish’s data-plane queries to check common properties such as reachability/black holes, loops, etc, as well as novel properties (introduced at NSDI’15) regarding equivalence of multipath routes, fault-tolerance, and unique delegation of customer address space, with more to come.

IPv6 Buzz 035: Selling Your IPv4 Addresses For Fun And Profit – Packet Pushers

Your IPv4 addresses are a financial asset because the market for v4 address space is rising. The question is, for how long? Guest Lee Howard joins the IPv6 Buzz podcast crew to discuss the financial implications of selling IPv4 addresses. They also discuss the performance and operational benefits of moving to IPv6.

Source: IPv6 Buzz 035: Selling Your IPv4 Addresses For Fun And Profit – Packet Pushers

Illegitimate Source IPs At IXPs – Franziska Lichtblau

Talk on

Presentation file: Franziska Lichtblau: Illegitimate Source IP Addresses at Internet Exchange Points (PDF)

Interesting talk to watch… A thing or two to think about in the current internet when remembering the year Pakistan hijacked YouTube. [1] [2]