OSPFv3 Configuration Quiz

A router that connects multiple areas in an OSPF domain. It maintains separate LSDBs for each area and routes between them. ABRs are exit points for their areas, allowing routing information to be distributed to the backbone.

A router connected to at least one external network (not part of the OSPF domain). It imports external network information into the OSPF network and vice versa using route redistribution.

A process used by ASBRs to exchange routing information between different routing domains (e.g., EIGRP and OSPF). It allows the advertisement of routing information from one domain to another.

A database that stores routing information about the local area within an OSPF network.

The central area in a multiarea OSPF network. All areas connect to the backbone, ensuring communication between separate areas.

A configuration parameter used in OSPF for defining the area to which a network belongs. It helps build independent areas within an OSPF domain.

A process of summarizing route information for an entire area by aggregating addresses into a single route. It is used by ABRs to simplify routing information distributed to the backbone.

The process of distributing routing information from a router to its neighbors. It is used in OSPF to update the LSDB of connected routers.

A process of verifying the correct configuration and functionality of OSPF by analyzing network information.

A network simulation environment used for configuring and testing OSPF (and other protocols).

A type of network topology where two routers are directly connected, usually over a dedicated link.

A specific configuration in OSPF where each router can communicate directly with every other router on the network.

Two routers that are directly connected and form a point-to-point network in an OSPF environment.

The process of configuring a router to advertise its network information to other routers within an OSPF area.

A mechanism in OSPF used to ensure that only one router acts as the designated router (DR) and one as the backup designated router (BDR) within a multi-access network segment.

A router in an OSPF network that is elected to be the primary point for exchanging OSPF information within a specific network segment.

A backup router in an OSPF network, ready to take over the role of the Designated Router (DR) if it fails.

A network segment where multiple routers can connect to, requiring election of a DR and BDR to manage OSPF communication effectively.

The time a router waits to receive a hello packet from a neighbor before assuming the neighbor is down. The default is 4 times the Hello interval.

The time a router sends out periodic hello packets to its neighbors to maintain the adjacency. The default is 10 seconds.

The time a router waits for a neighbor to change its state to 'Full' to send a database description packet.

The time a router sends out periodic hello packets to its neighbors to maintain the IPv6 adjacency. The default is 10 seconds.

Changing the OSPF timers to detect network failures faster. This increases traffic but can be useful for quick convergence.

A measurement of the bandwidth, used by OSPF to calculate the cost of a path. The lower the bandwidth, the higher the cost.

The time interval that a router will wait for a neighbor to respond to a Hello packet. If the neighbor does not respond within this time interval, then the router will remove the neighbor from its adjacency list.

The time interval that a router will send Hello packets. More frequent Hello messages mean more frequent updates and higher bandwidth usage.

Changing the configuration to manipulate the path that routers will use. This is done by changing factors that influence the cost of the path, such as bandwidth.

Testing connectivity between all devices in a network to make sure they are properly connected.

A number representing the priority of a router's interface in the OSPF DR/BDR election process. It determines the likelihood of a router being chosen as the DR or BDR.

The default OSPF interface priority value. It means the router has an equal chance of being selected as the DR or BDR.

The highest priority value for OSPF interfaces. A router with this priority value is likely to be elected as the DR.

How an OSPF router determines its own identity. It can be manually configured, defined by the highest loopback IPv4 address, or determined by the highest active IPv4 address.

A command in OSPF to manually configure a router's priority value.

The process of resetting all OSPF processes on a router. This action clears all OSPF configuration and state information, causing the router to re-initialize its OSPF processes.

OSPF uses a designated router (DR) and backup designated router (BDR) to minimize flooding of routing information. The DR acts as a central point to handle updates, while the BDR provides redundancy.

The OSPF priority value determines which router is elected as the DR. Higher priority values indicate a higher chance of election. Default priority is 1.

A default static route is a route that directs all traffic not explicitly defined otherwise to a specific destination. It can be used for Internet connectivity.

The default-information originate command in OSPF configuration instructs a router to advertise a default route to neighbors. This allows other routers to reach destinations beyond the OSPF network.

To propagate a default route, the edge router must be configured with a default static route and the default-information originate command. This allows the default route to be distributed throughout the OSPF network.

OSPFv3 (OSPF for IPv6) uses a different command for configuring default static routes: ipv6 route ::/0 ipv6-address|exit-intf. The default-information originate command remains the same for advertising the default route.

The DR and BDR roles are elected based on priority values. Routers with higher priorities are more likely to be elected. When the priority is the same, election is based on router ID.

By modifying OSPF priorities on routers, you can influence DR and BDR elections. Higher priority values increase the likelihood of a router being elected. This allows for control over routing decisions.