Tag Archives: active

First-hop redundancy

Posted on December 15th, 2014 (Monday) by Mr. Bart

The first hop redundancy, gateway load balancing is really not that scary or difficult. For the Cisco certification the candidates are required to have some basic understanding of the Gateway Redundancy Protocols: FHRP, HSRP, VRRP, GLBP.

Posted in Cisco | Tagged 0000.0c07.ac01, 07ac, 100, 1985, 224.0.0.2, 3 seconds, active, Active router election, address, default, FHRP, first hop redundancy, First Hop Redundancy Protocol, gateway load balancing, Gateway Load Balancing Protocol, GLBP, hello, highest wins, hold, Hot Standby Router Protocol, HSRP, interface tracking, listening, local priority value, msec, port, priority, round robin, router states, show standby, show standby brief, show track, standby, standby 1 ip standby 1 priority standby 1 preempt, standby 1 timers, timers, track 1 interface, udp, virtual IP, virtual MAC, Virtual Router Redundancy Protocol, VRRP, well known virtual MAC | Leave a comment

EIGRP

Posted on May 23rd, 2014 (Friday) by Mr. Bart

The EIGRP stands for Enhanced Interior Gateway Routing Protocol At first I was a bit confused about the EIGRP. It was somewhat similar to the RIP and OSPF in terms of some terminology.

Posted in Cisco | Tagged 224.0.0.10, active, Advertised Distance, Advertised Metric, Autonomous System Numbers, bandwidth, delay, Diffusing Update Algorithm, distance vector, DUAL, EIGRP, Enhanced Interior Gateway Routing Protocol, Feasibility Condition, Feasible Distance, Feasible Successor, hop count, hybrid routing protocol, K-value, K1, K2, K3, K4, K5, link-state, load, Maximum Transport Unit, metric, metric vector, MTU, passive, Query, reliability, Reply, Reported Distance, Reported Metric, routing table, Successor Route, topology table, update | Leave a comment

OSPF

Posted on April 29th, 2014 (Tuesday) by Mr. Bart

The OSPF is link-state routing protocol. Link state protocol is such that the metric is based on bandwidth, load, reliability etc. of a given link as oppose to number of hops between networks.

Posted in Cisco | Tagged 2-Way, 224.0.0.5, 224.0.0.6, 2Way, ABR, active, Adjacency states, area, area 0, Area Border Routers, AS, ASBR Autonomous System, Attempt, Autonomous System Boarder Router, Back Bone Area, Backup Designated Router, bandwidth, BDR, Broadcast OSPF addresses, converged, convergence, Database Descriptor, DBD, Dead Intervals, Designate Router, Dijkstra algorithm, Down, DR, DROther, elections, Exchange, ExStart, Full, Hello Intervals, Hello message, IGP, Init, initial sequence number, Interior Gateway Protocol, link-state acknowledgement, link-state advertisement, link-state database, link-state protocol, link-state request, link-state update, Loading, loopback interface, LSA, Master, NBMA Non-Broadcast Multiple Access, neighbor relationship adjacency, neighbour relationship, Open Shortest Path First, OSPF, OSPF domain, OSPF Timers, passive, RID, Router ID, router priority, Shortest Path First, Slave, SPF | Leave a comment

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