OSPF Flashcards
What type of advertisements does OSPF send to neighboring routers with link states and link metrics?
Link State Advertisements
What database are LSA Link State Advertisements stored on a local router?
LSDB-Links State Database
What protocol number does OSPF use over IPv4, which is reserved for OSPF by IANA?
89
What is ALLSPFRouters and the multicast address?
224.0.0.5 for ALLSPFRouters (ALL Routers running OSPF)
What is ALLDrouters and the multicast address?
224.0.0.6 for ALLDrouters (DR-Designated Routers)
What is OSPF hello packets responsible for?
discovering and maintaining neighbors
Each process maintains a table for adjacent OSPF neighbors and the state of each router? Yes or no
yes
What is the Designated router responsible for?
Flooding updates to all OSPF routers on that segment as updates occur
In the event that a DR router fails what takes over?
BDR Backup Designated Router
What is the purpose of a passive OSPF interface?
prohibits adjacency’s from forming
How does a OSPF passive interface prohibit adjacency from forming?
does not send out OSPF hellos and does not process any received OSPF packets
Do DROther routers establish full adjacency with other DROther routers routers? yes or no
no
What command is used to advertise the default route to an OSPF domain?
default-information originate
When you set an interface priority to 0, what occurs?
removes the DR/BDR election immediately
What is a NBMA Non-broadcast multiple-access network?
physical link that doesn’t support sending the same packet to more than one destination and same physical link is used to communicate with more than one destination
