GRE Tunnel Between Cisco and Linux

Generic Routing Encapsulation – GRE is a tunneling protocol originally developed by Cisco that encapsulates various network protocols inside virtual point-to-point tunnel. It transports multicast traffic via GRE tunnel so it allows passing of routing information between connected networks. As it lacks of security it is very often used in conjunction IP SEC VPN that on […]
Continue reading…

Share
 

Part1 - Recompiling Linux Core 4.7.7 for Equal-cost Routes

The article describes steps to recompile Core Linux 4.7.7 with the kernel 3.0.21 in order to have redundant multiple equal-cost routes presented in a kernel routing table. The following two points must be accomplished to get it working. 1. Quagga routing suite Quagga must to be compiled with parameter –enable-multipath=ARG to allow to copy multiple […]
Continue reading…

Share
 

EtherChannel,VRRP, DHCP, OSPF Configuration - Cisco, Vyatta, Microcore

The tutorial shows EtherChanel, VRRP, DHCP and OSPF configuration on Cisco, Vyatta and Microcore Linux.  A campus network (look at figure 1) is created with Access and Distribution layer. Instead of Layer 2 switches in Access layer there is Cisco Router 3725  occupied with NM-16SW module in this layer and Cisco  is emulated by Dynamips. […]
Continue reading…

Share
 

Linux Core as Router and L3 Switch Appliance

The tutorial introduces  a virtual router and layer3 switch appliance based on Linux Core.  The appliance is basically Linux Core installed on Vmware virtual machine loaded with Open vSwitch extension and two routing daemon extensions – Quagga and Bird. The disk also contains several  extensions useful for testing network such as d-itg, hping3 and others. The list of available […]
Continue reading…

Share