Network Flashcards
What type of Routing protocol predominantly is OSPF?
Link State
When does OSPF exhibit distance vector routing attributes?
Between Areas
What does OSPF stand for?
Open Shortest Path First
What Algorithm does OSPF use for path calculation?
Dijkstra Algorithm
Is OSPF an EGP or IGP protocol?
IGP
Define DR
Designated Router -
Define ABR
Area Border Router -
Define ASBR
Autonomous System Border Router -
Define NSSA
Not-So-Stubby-Area -
How do OSPF discovery neighbor rotuers?
Hello messages with link state information
Default hello interval?
10 Seconds
How often does OSPF routers flood routes and why?
30 mins and because all LSAs have a MaxAge where they will be removed
What are the differences between v2 and v3?
- v3 supports IPv6
- v3 uses prefix and prefix lengths
- v3 Link Local IPv6 for discovery
- v3 IPv6 RFC6506 or IPsec RFC4552 for authentication – not supported by NX-OS
- New LSA definitions
- BFD is v2 only
Default Dead_Interval
4x Hello timers
What happens if Dead_interval is reached?
Router is removed from neighbor table