Term
| What is the purpose of an OSPF Hello packet? |
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Definition
| Establish and maintain adjacency with other OSPF routers. |
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Term
| What are the tasks of DR, BDR and DROther |
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Definition
DR floods LSP's to all other routers on a multi access network.
BDR - monitors the DR and takes over if the DR goes down.
DROther's receive LSP's from the BDR on a multi-access network. |
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Term
| What is the administrative distance for RIP, OSPF, EIGRP and IS-IS? |
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Definition
EIGRP 90
OSPF 110
IS-IS 115
RIP 120 |
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Term
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Definition
| An OSPF area is a group of routers that share link-state information. |
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Term
| The OSPF router id is determined in three steps. What are those steps? |
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Definition
1. Was the Router-id command used.
2. Highest IP of loopback interface.
3. Highest IP of physical interface. |
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Term
| What three commands can show the Router-id? |
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Definition
1. show ip protocols
2. show ip OSPF
3. show ip OSPF interface |
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Term
| The show ip protocols gives what information about the OSPF running on your router? |
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Definition
1. OSPF process ID
2. The Router ID
3. Networks the router is advertising
4. Neighbors the router is receiving updates from
5. Default AD |
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Term
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Definition
| A link which cycles between up and down. |
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Term
| What is the SPF schedule delay? |
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Definition
| Amount of time the router waits after receiving an LSU before running the SPF algorithm. |
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Term
| What is the default reference bandwidth? |
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Definition
| 10 to the 8th = 100,000,000 = 100 Mbps |
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Term
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Definition
| Autonomous System Boundary Router - Router between an OSPF and non-OSPF network. |
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Term
| For routers to become adjacent what items must match? |
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Definition
Hello interval
Dead interval
network types
subnet masks |
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Term
| Creates and maintains neighbor adjacencies. |
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Definition
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Term
| Triggered when a topology change has occurred. |
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Definition
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Term
| Description of an interface and its relationship to other routers. |
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Definition
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Term
| Calculates the best path to each destination network |
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Definition
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Term
| What are two reasons to choose for setting a loopback address when configuring OSPF? |
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Definition
| The loopback address will set the router ID over the physical interfaces and does not go down. |
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Term
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Definition
| An OSPF route learned externally which will not increment in cost. |
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