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Configure Redistribution between RIP and OSPF in Cisco IOS Router

These days almost nobody uses RIP anymore, unless their network has to support a legacy machine or an older router model. In this situation, the best practice is to limit RIP network as such and use a newer routing protocol on the rest part of the network, such as OSPF. Cisco IOS Router supports both […]
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Configure VRF in Cisco IOS Router

Virtual Routing and Forwarding or VRF is a technology that supports multiple routing instance inside a single router (or layer-3 switch). This means a single router can have multiple separated routing table and each one is completely independent. Due to its independency, it also allows the usage of overlapping IP address. Cisco IOS router supports VRF by […]
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Configure eBGP in Cisco IOS Router

BGP stands for Border Gateway Protocol and is a routing protocol that builds this gigantic inter-network connection that is known to us all as the internet. There are two types of BGP, namely internal BGP (iBGP) and external BGP (eBGP). The protocols and attributes used in either iBGP or eBGP are standardized for all vendors, […]
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Configure Dynamic Port Address Translations (PAT) in Cisco IOS Router

Both static and dynamic Network Address Translations (NAT) allows the translation of local address to global address and allowing it to communicate to outside of the local area network. The problem is the number of global address is usually a lot less than the local address requiring the translation. To overcome this issue, Cisco supports […]
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Configure Policy Based Routing on Cisco Router

Policy Based Routing or PBR is a feature for network administrator to manipulate packet routing and forwarding to follow a defined policy set. In short, if packets arrived on a router matches a characteristic defined in the policy, then it will be given custom actions and ignoring the routing and forwarding logic. Such actions to […]
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Configure Load Balancing on Cisco EIGRP

EIGRP or Enhanced Interior Gateway Routing Protocol is a Cisco proprietary technology for routing. It calculates the best route to a destination using metric value that is based on the link bandwidth and delay. When there are several routes with an equal metric value, by default all dynamic routing protocols, including EIGRP, will used all […]
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Configure GLBP in Cisco IOS Router

Improvement at the gateway level is now more than just about redundancy as we can use Cisco’s sophisticated feature called GLBP or Gateway Load Balancing Protocol. Just by looking at the name, we can easily guess its superior value compared to HSRP or VRRP. In HSRP or VRRP, only the active/master router that do the […]