Category: EIGRP

Here is a list of the most important EIGRP features: advanced distance vector routing protocol classless routing protocol supports VLSM (Variable Length Subnet Mask) converges fast supports multiple Network layer protocols (IPv4, IPv6, IPX, AppleTalk…) uses multicast address of 224.0.0.10 Read More …

Diffusing Update Algorithm (DUAL) is an algorithm used by EIGRP to select and maintain the best route to each remote network. DUAL is also used for the following purposes: discover a backup route if there is one available. support for variable Read More …

EIGRP doesn’t send messages with UDP or TCP; instead, a Cisco’s protocol called Reliable Transport Protocol (RTP) is used for communication between EIGRP-speaking routers. As the name implies, reliability is a key feature of this protocol, and it is designed Read More …

EIGRP authentication EIGRP authentication is used to prevent an attacker from forming the EIGRP neighbor relationship with your router and advertising incorrect routing information. By using the same preshared key (PSK) on all routers you can force EIGRP to authenticate Read More …

Route summarization is a method of representing multiple networks with a single summary address. It is often use in large networks with many subnets because it reduces the number of routes that a router must maintain and minimizes the traffic Read More …

The network command in EIGRP uses a classful network as the parameter by default, which means that all interfaces inside the classful network will participate in the EIGRP process. We can enable EIGRP only for specific networks using wildcard masks. Read More …

Configuring EIGRP 1 EIGRP configuration closely resembles RIP configuration. Only two steps are required: enabling EIGRP by using the router eigrp ASN_NUMBER command telling EIGRP which networks to advertise by using one or more network statements The first command, router Read More …

EIGRP (Enhanced Interior Gateway Routing Protocol) is an advanced distance vector routing protocol. This protocol is an evolution of an earlier Cisco protocol called IGRP, which is now considered obsolete. EIGRP supports classless routing and VLSM, route summarization, incremental updates, load Read More …