IT Certification and Training Blog

CCNP SWITCH Exam - Router Redundancy Protocols

Feb 9, 2011 8:31:00 AM / by Kelson Lawrence posted in GLBP, networking, VRRP, SWITCH, router, CCNP, router protocols, HSRP, redundancy


By Josh E.

Being able to implement first hop router redundancy protocols is one of the objectives listed for Cisco’s 642-813 SWITCH exam. Cisco supports three first hop redundancy protocols: Gateway Load Balancing Protocol (GLBP), Hot Standby Router Protocol (HSRP), and Virtual Router Redundancy Protocol (VRRP). This article provides an overview of each of these protocols.

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A Case Study on EIGRP Graceful Shutdown

Feb 8, 2011 10:25:00 AM / by Kelson Lawrence posted in EIGRP, graceful shutdown, router, Eigrp graceful shutdown, case study, router protocols

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By Andrew Messier

The topology for this study consists of two routers connected on a LAN. FastEthernet 0/0 on Router1 connects to FastEthernet 0/0 on Router2. Full connectivity exists between both routers, and Enhanced Interior Gateway Routing Protocol (EIGRP) using Autonomous System (AS) 100 is configured to run on both FastEthernet ports. Below is sample configuration for this setup:

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