Understanding the Use of Universal CPE
The goal is to transform the telco network into a cloud-centric platform.
Who Controls The Internet?
The title of the paper Who controls the Internet? Analyzing global threats using property traversal graphs is enough to ensnare any Internet researcher. The control plane for a number of attacks, as the paper points out, is the DNS due to the role it plays in mapping names to resources. MX records in the DNS control the flow of mail, CNAME records are used to implement content delivery networks (CDN) services, and TXT records are used to confirm access to and control over a namespace when implementing third party services. This post will cover an interesting case where control is exercised first via the DNS and then using BGP.
Below the DNS, in the depths of internet plumbing, is the lizard brain of internet routing, which is governed by the border gateway protocol (BGP). A common term to describe BGP routing is “hot potato” routing. BGP conversations occur between autonomous systems, ASes, which are identified by their autonomous system number ASN. The ASN represents a system of networks and the policy associated with their routing. ASes are issued regionally by Regional Internet Registries (RIRs), which receive blocks of AS numbers to hand out from the Internet Assigned Numbers Authority Continue reading
Measuring Router Performance Using Netscout OptiView XG
In this video, Tony Fortunato describes testing the throughput of Ubiquiti EdgeRouterX.
IPv6 Link-Local Addresses and VLAN Interfaces
One of my readers sent me an email that’s easiest paraphrased into: “Why can’t I have a different IPv6 link-local address (LLA) on every access port connected to a VLAN interface?”
There’s probably nothing stopping someone from implementing such an approach, but it would go against the usual understanding of how bridging and routing interact in L2+L3 switches.
Read more ...Interface basics on the Juniper MX
I’ve been spending more time on the MX recently and I thought it would be worthwhile to document some of the basics around interface configuration. If you’re like me, and come from more of a Cisco background, some of configuration options when working with the MX weren’t as intuitive. In this post, I want to walk through the bare bone basic of configuring interfaces on a MX router.
Basic L3 interface
ge-0/0/0 {
unit 0 {
family inet {
address 10.20.20.16/24;
}
}
}The most basic interface configuration possible is a simple routed interface. You’ll note that the interface address is configured under a unit. To understand what a unit is you need to understand some basic terminology that Juniper uses. Juniper describes a physical interface as an IFD (Interface Device). In our example above the IFD would be the physical interface ge-0/0/0. We can then layer one or more IFL (Interface Logical) on top of the IFD. In our example the IFL would be the unit configuration, in this case ge-0/0/0.0. Depending on the configuration of the IFD you may be able to provision additional units. These additional units (Logical interfaces (IFLs)) Continue reading
Network Break 143: Broadcom Acquisition OK’d; Mellanox Announces New ASICs
Broadcom wins FTC approval for its Brocade buy, Cisco gets FTC help around Fibre Channel, Mellanox announces 400G ASICs, and other tech news on the latest Network Break podcast. The post Network Break 143: Broadcom Acquisition OK’d; Mellanox Announces New ASICs appeared first on Packet Pushers.
Cloud Providers Tap Private Brokers for IPv4 Addresses
MIT recently announced it was selling about 8 million of its unused IPv4 addresses.