Tag Archives: Backup Designated Router

Further OSPF configuration

Posted on May 13th, 2014 (Tuesday) by Mr. Bart

I have been struggling with configuration of the OSPF for quite a few days now, trying to figure out how loopback interfaces and hard-coded router-id is affecting the Designated Router election.

Posted in Cisco | Tagged 2Way, Backup Designated Router, BDR, clear ip ospf process, dead timer, Designated Router, Designated Router election, DR, DR/BDR, DROther, election, formula, Full, Hello packet, Hello Timer, loopback interface, OSPF packet header, physical interface, reference-bandwidth, RID, Router ID, router ospf, router priority, show commands, show ip ospf, show ip ospf neighbor | Leave a comment

Basic OSPF Configuration

Posted on May 8th, 2014 (Thursday) by Mr. Bart

Note: The spelling of the word that describes people who live next to someone is different in British and North American dialect of English. Cisco uses the American spelling in commands and their output. When we talk about a neighbour … Continue reading →

Posted in Cisco | Tagged adjacency state, area, area 0, Back Bone Area, Backup Designated Router, BDR, configuration, core area, default-information originate, Designated Router, DR, DROther, Full, gateway of last resort, NBMA, neighbor, neighbour, network, NonBroadcast Multiple Access, OSPF, physical interface, point-to-point, propagate default route, Router ID, router ospf, show ip ospf, show ip ospf database, show ip ospf neighbor, show ip route, wild-card mask | 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

Tag Archives: Backup Designated Router

Further OSPF configuration

Basic OSPF Configuration

OSPF

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