CCIE EIGRP Filtering (GNS3 lab) In this GNS3 lab we're looking as the various options on how we can filter updates between EIGRP speakers and then how that affects the traffic flow (as EIGRP is
CCIE 6to4 Tunnelling (GNS3 Lab) This is a quick lab to look over how 6to4 tunnelling can be implemented using GNS3 1.3 and 3725 (running c3725-adventerprisek9-mz124-15.image). The topology will be as below but
Fedora Install GNS3 1.x on Fedora 22 Quick guide to installing the quite awesome GNS3. Very similar process to Fedora 20 but this time using DNF and a small adjustment on some package names with some extras
CCIE GET VPN (GNS3 Lab) Group Encrypted Transport (GET) VPN is slightly different and has quite different use cases from more traditional point to point IPSEC VPN where each point to point VPN is quite
CCIE DMVPN setup with PSK (GNS3 Lab) Dynamic Multipoint VPNs (DMVPN) offer a low admin overhead and scalable VPN solution. It is also efficient at routing traffic as it can dynamically reconfigure itself from a hub and
GNS3 Install GNS3 1.0 on Fedora Recently started to play around with the new GN3 1.0 release on my Fedora 20 laptop. Just a quick guide to installing since the official notes only seem to
GNS3 Fedora 19 how to install GNS3 Doesnt seem to be a package for GNS3 on Fedora but installing from source is pretty straight forward :) The example below uses the latest version at the time of writing
CCNP Security DMVPN with PKI authentication (GNS3 Lab) Dynamic Multipoint VPNs (DMVPN) offer a low admin overhead and scalable VPN solution. It is also efficient at routing traffic as it can dynamically reconfigure itself from a hub and
CCNP Security Cisco IOS Certificate Server set-up and client enrolment (GNS3 Lab) A quick step by step overview of how to configure the certificate server on a Cisco IOS device. The certificate server functionality was added in version 12.3(4). It
CCNP Security Dynamic point to point IPSEC VPN tunnels using DTVIs (GNS3 Lab) Manually configuring point to point IPSEC tunnels can become a big administrative burden as the number of endpoints grows. In a hub and spoke environment we can use Dynamic Virtual
640-553 CCNA Security Simple Zone Based IOS Firewall (GNS3 Lab) Just a post about the basic config and options of Cisco IOS zone based firewall using the Topology below Grab the initial configs and GNS3 .net file [HERE]. From the
640-553 CCNA Security Steps to configure an IPSEC site to site VPN on a Cisco IOS device (GNS3 Lab) Just some short notes on basic IOS vpns using the topology below as an example. All the configuration examples are for the router Lefty. Grab the GNS3 .net file and
642-691 BGP+MPLS BGP Route Reflectors (GNS3 lab) One problem of having a large number of routers running IBGP with each other in a full mesh is the volume of IBGP connections needed. The formula to see the number of connections needed for a full IBGP mesh is n(n-1)/2 so
642-691 BGP Confederations (GNS3 Lab) Similar to using route reflectors confederations are usually used to reduce the amount of IBGP connections needed for a full mesh. They do this by splitting an AS into multiple sub ASs. In the sub ASs created by the confederation all the normal rules
642-691 BGP+MPLS Changing MED value in BGP (GNS3 lab) BGP Multiexit Discriminator (MED or MULTI_EXIT_DISC) is an optional nontransative attribute (Type code Value 4). It is usually used to exchange info about a preferred to external BGP
