What is MySQL cluster and how to use it? MariaDB Galera Cluster is a synchronous multi-master cluster for MariaDB, available on Linux only, and only supports the XtraDB/InnoDB storage engines . It is designed to provide high availability and high throughput with low latency, while allowing for near linear scalability. Read more…
What is inter-vlan routing and why to use it? Inter-vlan routing is defined as a process of forwarding network traffic from one vlan to another vlan using a router or layer 3 device. To facilitate inter-vlan routing a router must be connected to the switching infrastructure or the switch must Read more…
What is EIGRP load balancing and why to use it? Load balancing is a standard functionality of the Cisco IOS router software, and is available across all router platforms. It is inherent to the forwarding process in the router and is automatically activated if the routing table has multiple paths Read more…
What is HAProxy and how to use it? HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for very high traffic web sites and powers quite a number of the world’s most visited ones. Read more…
What are VRF import/export maps and why to use it? VRFs are an excellent tool for maintaining segregated routing topologies for separate customers or services. However, what if you needed to export only a subset of routes within a VRF? Inter-VRF routing using route targets along with BGP are the Read more…
What is route filtering and why to use it? In the context of network routing, route filtering is the process by which certain routes are not considered for inclusion in the local route database, or not advertised to one’s neighbours. Route filtering is particularly important for use on large networks Read more…
Integrating Centos 7 with Windows Active Directory When a user logs in to a Linux system, the username and password combination must be verified, or authenticated, as a valid and active user. Sometimes the information to verify the user is located on the local system, and other times the system Read more…
What is HAProxy Server and how to use it? HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for very high traffic web sites and powers quite a number of the world’s most visited Read more…
What is a Layer 3 MPLS VPN and why to use it? Layer 3, or VPRN (virtual private routed network), utilizes layer 3 VRF (VPN/virtual routing and forwarding) to segment routing tables for each customer utilizing the service. The customer peers with the service provider router and the two exchange Read more…
What HA Datastore Heartbeating and how to use it? When the master host in a vSphere HA cluster can not communicate with a slave host over the management network, the master host uses datastore heartbeating to determine whether the slave host has failed, is in a network partition, or is Read more…