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CentOS

Install MariaDB Galera Cluster on Centos 7

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 Read more…

By Joe Conklin, 8 years ago March 15, 2016
Cisco Networking

Configuring Inter-vlan routing

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 Read more…

By Joe Conklin, 8 years ago February 20, 2016
Cisco Networking

EIGRP Unequal Cost Load Balancing

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…

By Joe Conklin, 8 years ago December 18, 2015
CentOS

MySQL Load Balancing using HAProxy

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 Read more…

By Joe Conklin, 8 years ago September 26, 2015
Cisco Networking

VRF Import/Export Maps

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…

By Joe Conklin, 8 years ago July 17, 2015
Cisco Networking

BGP Route Filtering

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 Read more…

By Joe Conklin, 8 years ago June 19, 2015
Active Directory

Join Centos 7 to a Windows Active Directory Domain

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 Read more…

By Joe Conklin, 8 years ago April 23, 2015
CentOS

HTTP Load Balancing using HAProxy

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 Read more…

By Joe Conklin, 9 years ago January 5, 2015
Cisco Networking

Configuring Layer 3 MPLS VPN

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 routes, which Read more…

By Joe Conklin, 9 years ago September 13, 2014
Storage

vSphere HA error: “The number of heartbeat datastores for host is 1, which is less than required: 2”

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 Read more…

By Joe Conklin, 9 years ago August 7, 2014

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