So far we have seen EVPN single home and EVPN multihome setup and configuration with Cisco csr1000v router. You can find the links for those posts below. EVPN -Single home GNS3 LAB Cisco : BGP-EVPN Single Home Configuration EVPN -Multi homeGNS3 Lab Cisco : EVPN Multihome Concept and Configurations Note : As per Cisco docs… Read More GNS3 LAB Cisco : EVPN (BGP/MPLS) IRB (integrated routing and bridging) Configuration and Verification.
Introduction: This article is focused on multi-homed EVPN setup that I have prepared in below network topology. One of the biggest advantage with EVPN that we get is multi-homing with it. Earlier with VPLS we did not have multi-homing integrated with the protocol. With multi-homing we can have one CE connected to two PE router… Read More GNS3 Lab Cisco : EVPN Multihome Concept and Configurations
This blog is very close to my heart because this is the first one where the lab is done on my recently built remote GNS3 server. Please check my blog on how to configure GNS3 as a remote server here How to Run GNS3 in Client Server Mode Now, lets get started with Segment routing.… Read More GNS3 LAB: Segment Routing Configuration on Cisco IOS-XE and IOS-XR routers.
My love hate relationship with GNS3 has come to a next level!! I have a server like configuration on my Ubuntu Machine , it has 64 GB memory so enough for my GNS3 practices.I used to VNC to this machine and run GNS3 on it. This was working just fine but since the day I… Read More How to Run GNS3 in Client Server Mode
NAT (Network Address Translation) is widely used technology which solves many problems like enabling internal hosts(private IP address range) to communicate with outer world, adding an extra security layer by hiding internal IP address etc. In this blog post I am going to discuss a small but widely common NAT issue. Please see the following… Read More Cisco IOS IP NAT Trouble Ticket 1
There are multiple methods to manage a device like TELNET, SNMP, NETCONF, REST API,HTTP,HTTPS etc . But I think SSH by far is most standard and robust to method. Unlike telnet SSH uses TCP to initiate the connection between the server and client.Once the three way handshake is done basically three steps occur to exchange… Read More Configuring SSH on Cisco devices
DMVPN or Dynamic multipoint VPN is a widely used technology. In this article I will explain why do we need it and how to configure it. Problem-1 : You have huge number of sites and you add and delete sites on daily basis. You connect those sites with GRE tunnels. Do you think adding and… Read More Cisco DMVPN Configuration and verification
On this blog I would like to discuss few basic details of ospf which everybody needs to know and which is very helpful to build the concepts of OSPF. For this we are going to use below reference GNS 3 topology. Question 1 : How and when the information about the ABR and ASBR is… Read More OSPF : Few basic questions…
As we know that IPSEC is one of the most common technology for VPNs today. Its powerful security techniques and efficiency makes it very powerful that all its supported across all the vendors. Basically IPSEC is like a security template where you put your security components eg. encryption techniques, hashing techniques, authentication techniques etc …basically… Read More IPSEC …baiscs and configuration/troubleshooting lab