Author Archives

• Cisco CRS Multi Chassis

  By Leonir Hoxha on November 5, 2015 • ( 0 )

  

  Lately I have been working on setting up a Cisco CRS (16 Slot) Multi Chassis 2+1 system for one of my customers (a leading Service Provider in EMEAR). The activities lasted roughly a week, full of activities and challenges at… Read More ›

• CCIE #49534

  By Leonir Hoxha on August 11, 2015 • ( 1 )

  

  I’m very happy to announce that I have passed the CCIE R&S lab exam 2 weeks ago. Time for some resting.. or maybe not!!!

• Generate dummy static IP Prefixes with Python

  By Leonir Hoxha on November 15, 2014 • ( 2 )

  This is my first but not last post on using some programming language to automate the way how I interact with a Cisco or non-Cisco network device. Imagine having hundreds or thousands devices making even a simple configuration change or… Read More ›

• Running CSR1000v on a VMware ESXi Hypervisor

  By Leonir Hoxha on October 4, 2014 • ( 0 )

  

  Being able to use Cisco Cloud Services Router CSR1000v in a stable Hypervisor and Physical machine is a key to the performance and stability of the CSR1000v itself. This time I want to share my latest set-up of the Cisco… Read More ›

• CSR1000v on GNS3

  By Leonir Hoxha on July 14, 2014 • ( 3 )

  

  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… Read More ›

• Internal VLANs

  By Leonir Hoxha on June 30, 2014 • ( 1 )

  All of us or most of us are aware of the famous VLAN types, the Standard and Extended VLAN’s, which to some extent makes sense. The Standard VLAN’s have a range starting from 1 up to 1005 including the last… Read More ›

• Transit AS with no full-mesh BGP

  By Leonir Hoxha on March 1, 2014 • ( 2 )

  

  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… Read More ›

• QoS Notes

  By Leonir Hoxha on January 7, 2014 • ( 0 )

  

  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… Read More ›

• Dynamic Multipoint VPN – DMVPN

  By Leonir Hoxha on December 24, 2013 • ( 2 )

  

  Dynamic Multipoint VPN is a technique and answer to the huge increase of Enterprise or Corporations remote sites or branches connecting to the HQ offices while in the same time maintain low costs (no need to purchase MPLS VPN services… Read More ›

• IPv6 notes

  By Leonir Hoxha on December 22, 2013 • ( 0 )

  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… Read More ›