How does the internet work - We know what is networking
IPv6 Anycast Address As the name says it’s an address that can exist more than once anywhere in the network. It is maybe better to say that it can exist in multiple places all over the Internet. This kind of address is basically enabling us to have servers and services physically closer to us as […]
Don’t look now, but you have microloops. How do I know? Because virtually every network with rings larger than three hops, running a link state protocol, will develop a microloop during normal convergence. Okay, so what’s a microloop, and how dangerous is it? Let’s figure this out looking at the (now rather standard) five router […]
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| Figure 1: Controller using HTTP / REST API |
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| Figure 2: Performance aware software defined networking |
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| Figure 3: OmniSwitch controller using hybrid OpenFlow |
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| Figure Continue reading |
Performance Aware SDN describes the theory behind analytics driven orchestration. The talk describes how fast controller response, programmatic configuration interfaces and consistent instrumentation of all the elements being orchestrated are pre-requisites for feedback control.This article uses an Alcatel-Lucent OmniSwitch 6900 as an example. The switch has hardware sFlow support for line rate visibility on all ports, and support for OpenFlow and a RESTful configuration API to deploy control actions. In this example a basic DDoS mitigation filtering function will be triggered when large flood attacks are detected. The script is based on the version described in the article Integrated hybrid OpenFlow, but modified to use the OmniSwitch RESTful API.
Welcome to the first in a series of articles that will explore some of the interesting properties we can insert into CEF, Cisco’s implementation of the Forwarding Information Base (FIB) in Layer-3 rotuers. CEF represents the high-speed forwarding architecture in the Cisco platforms. If we can insert data into the CEF memory structure we can […]
The post Secret CEF Attributes, Part 1 appeared first on Packet Pushers Podcast and was written by Dan Massameno.
sflow agent ip 10.0.0.235The switches also support the sFlow MIB for configuration.
sflow receiver 1 name InMon address 10.0.0.1 udp-port 6343
sflow sampler 1 port 1/1-20 receiver 1 rate 512
sflow poller 1 port 1/1-20 receiver 1 interval 30
Resiliency of the networks is almost the most important design criterion which needs to be considered. Packets need to be reached to destination within the time expected by the application. Although too much redundancy will affect MTBF/MTTR curve directly and start to increase MTTR of the entire system, carefully designed network topologies will play a […]
The post Network Topologies appeared first on Packet Pushers Podcast and was written by Orhan Ergun.
I’ve been spending some time in the last few months talking through various fast reroute systems – we’ve looked at one (unconventional!) view of P/Q space, an alternate way of explaining MRT, Not-Via, LFAs, and a few others. Now, let’s close this series by asking: How does all this relate to the “new wave’ of […]
Hello and Welcome to my blog in 2014 !! I'll start this year by reviewing some of the most commented quizzes in the previous year. Read here to get the Top 5 most interesting quizzes in 2013.
We here at Packet Pushers used to use FeedBurner. It was a value-added RSS service that was eventually brought under Google’s mighty power. Sadly, as with Buzz and Wave, Google has killed FeedBurner. While the FeedBurner service is still limping along, we’re seeing unpredictable results. Even the 301 redirects Greg programmed a while back are […]
The post Please Check Your Feed URLs – FeedBurner Is Dead To Us appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Expands Management Team with New Executive Role Focused on Customer Success
AUSTIN, Texas — Jan. 7, 2014 — Packet Design, a provider of IP network route analytics software, has hired technology veteran Daniel Ley to lead global sales. Ley joins Packet Design from CA Technologies, where he led the North American Solution Sales team for the capacity management and Nimsoft Monitor products.
Previously, Ley served as vice president of worldwide sales at Hyperformix, and as director of sales for NetQoS, where he led teams in the North America, Asia Pacific and emerging markets. CA Technologies acquired both companies. Prior to NetQoS, he held various sales and sales management roles at Ward Davis, a networking products and services company. Ley began his career in avionics engineering and engineering management with Hughes Aircraft Company.
“Daniel Ley is a proven leader who excels in building high-performance sales teams,” said Scott Sherwood, CEO of Packet Design. “His strong technical background helps him understand the customer domain extremely well, and his focus on sales operations best practices leads to predictable revenue and growth.”
“Packet Design is planning for impressive new customer acquisition and revenue growth, and I look forward to leading this Continue reading
