CCIE, to be or not to be.

As a CCIE myself and working for a leading Vendor in the IT Industry, I have been into situations where the value of a CCIE has been questioned by various reasons, personal or non-personal. And that is quiet obvious considering the latest innovations in the Industry, the so called 'SDN era'. There are many reasons why … Continue reading CCIE, to be or not to be.

CSR1000v on GNS3

It has been quite some time since the Cisco’s Cloud Services Router CSR1000v was publicly released. CSR1000v is a virtual router or in other words it run’s the IOS software inside a Virtual Environment (in a Virtual Machine), and that’s not all because it can run the latest IOS XE software which is the successor … Continue reading CSR1000v on GNS3

Transit AS with no full-mesh BGP

This time I will try to explain how to achieve passing the Transit traffic without affecting our internal domain of having all the externall routes, at least from the Control Plane point of view, because the Data Plane traffic however will pass through our internal devices. So, let's say our Autonomous System number is 10, … Continue reading Transit AS with no full-mesh BGP

QoS Notes

Some personal notes about my on-going QoS studies, as already explained on earlier posts this notes will be updated all the time as I study deeper on the subject. QoS Models: 1) Integrated Services (IntServ) 2) Differentiated Services (DiffServ) IntServ is used on connection-oriented services, so that it requires states of all nodes along the … Continue reading QoS Notes

IPv6 notes

This topic will be updated with additional notes all the time.. - 128 bit hexadecimal address format. - 16bit every field. - 8 fields totally. - Global Unicast addresses (similar to ipv4 public addresses) - Link Local addresses (are used only between two connected routers, significant only on the same segment. Are also used for … Continue reading IPv6 notes