On August 30, 2020, Level 3/Century Link, AS 3356 had major Internet outage. In fact this outage effected massive amount of networks, including very well know ones such as Amazon, Microsoft, Twitter, Discord, Reddit etc.
BGP Confederation is specified in RFC 5065, which describes the use of Autonomous System Confederations for BGP – Border Gateway Protocol.
BGP Route Server is used at the Internet Exchange Point to simplify BGP Peering process. Instead of managing, maintaining hundreds of Peering sessions in large Internet Exchange Point, BGP Route Server is used.
MPLS Applications, what are the MPLS Applications?. MPLS Applications mean MPLS Services. So what can we do with MPLS basically.
Integrated Services QoS – Hard QoS is first QoS approach, but currently we are not using. At the end of this post, you will know what is Integrated QoS, what was the idea with it and why it is not used today. Quality of service (QoS) is the overall performance of a telephony or …
CGN is also known as LSN (Large Scale NAT). And in my opinion, it should be called LSN since there is nothing for CGN to be a carrier grade. It is just a NAT. With CGN, Service Providers do NAT44 on the CPE from private address to another private address (Well known /10 prefix which …
VPN – Virtual Private Network is most common overlay mechanism in Networking. We have many of them, GRE, mGRE, IPSEC, DMVPN, GETVPN, LISP, FlexVPNs, MPLS VPNs and so on. But what are the important and fundamentals thing about VPNs?.In this post I will explain some of them.
OPEX and CAPEX are two important network design considerations. From the high level we should understand these two design requirements.
When it comes to Routing Security, BGP Origin and Path Validation should be understood very well.
Flat/Single Level vs. Multi Level IS-IS Design Comparison. Flat routing means, without hierarchy, entire topology information of the network is known by each and every device in the network.