Pearson Test Prep - OSPF
11 important questions on Pearson Test Prep - OSPF
What are the 2 stable states for OSPF routers?
Full
What are the IPv6 multicast addresses for OSPF?
FF02::6 - All DR/BDR Routers
What is the OSPF priority value?
Highest wins
Value of 0-255
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What are 7 LSA Types used by OSPF for IPv4 routing?
Type 2, Network LSA - Indicates the routers attached to broadcast segment within an area
Type 3, Summary LSA - Advertising network prefixes from a different area
Type 4, ASBR Summary LSA - Used to locate ASBR from a different area
Type 5, AS External - Advertising network prefixes that were redistributed in to OSPF
Type 7, NSSA External - For external network prefixes that were redistributed in a local NSSA
What OSPF areas suppress which type of LSA Types?
Totally stubby area - Suppresses Type 3, Type 4 and Type 5 LSAs
Not-So-Stubby area - Suppresses Type 4 and Type 5 LSAs but allows Type 7 LSAs
Totally Not-So-Stubby area - Suppresses Type 3, Type 4 and Type 5 LSAs but allows Type 7 LSAs
What are the two ways of summarization in OSPF?
Using command: Area area-id Range network mask
Type 4 and 5 or External Summarization
Using command: Summary-Address network mask
In OSPF neighbor timers have to match. Which network types have which timers?
Hello - 10 seconds
Dead - 40 seconds
Non-Broadcast and Point-to-Multipoint
Hello - 30 seconds
Dead - 120 seconds
What is the command for redistributing routes into OSPF?
What is the Redistribute command option of 'Subnet' for?
What does the Include-Connected option do in the Redistribute command for OSPFv3?
When this option is used they will be considered.
In OSPF, which instance ID indicate which IP protocol version?
IPv6 - Instance ID 0-31
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