5 Subnetting Benefits
Learn how subnetting can help improve network performance and security.
Nokia Enhances ‘Impact’ to Ease IoT Deployments
The updated platform uses NB-IoT and LoRa for connectivity
Why Are High-Speed Links Better than Port Channels or ECMP
I’m positive I’ve answered this question a dozen times in various blog posts and webinars, but it keeps coming back:
You always mention that high speed links are always better than parallel low speed links, for example 2 x 40GE is better than 8 x 10GE. What is the rationale behind this?
Here’s the N+1-th answer (hoping I’m being consistent):
Read more ...Addressing 2016
Time for another annual roundup from the world of IP addresses. Let’s see what has changed in the past 12 months in addressing the Internet, and look at how IP address allocation information can inform us of the changing nature of the network itself.Flokibot Invades PoS: Trouble in Brazil
Introduction Threat actors salivate at the thought of an increased volume of credit and debit card transactions flowing through endpoints they have compromised with card-stealing malware. While there are many distinct malware families that scrape unencrypted process memory to obtain cards, some of these malware capabilities overlap with generic information stealing trojans such as Flokibot […]VRF Series Article 5 – Stateful Inter-Vrf connectivity
This is the fifth and final article in a series that focused on Segmenting Layer 3 Networks with VRFs. In the third article, we discussed creating a shared services VRF and using it within the otherwise segmented network. In that article I alluded to the fact that we would 
later cover a way to securely allow traffic to flow between security zones. That is the intent of this article.
In this article, I am going to attach two sub interfaces between asav-1 and Main. One will attach into data and the other into pci. We will apply a simple policy that denies all traffic from data to pci, but allows telnet from pci to data (bad security example, but easy to demonstrate).
Before we jump into the configuration, I want to share the entire topology and give a summary of the current configuration status.
Current Configuration
In the above topology, anything that starts with “data” is in the data VRF. Likewise, anything that starts with “pci” is in the pci VRF. Everything within a given VRF can communicate with everything else in that same VRF. Both pci and data can communicate with the shared VRF (test IP address is Continue reading