Routing Protocols (RIP, OSPF, EIGRP)
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| What does RIP stand for? | Routing Information Protocol
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| What kind of routing protocol is RIP? | Distance-vector
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| When does RIP send information about its routing table? | RIP sends an update every 30 seconds, and it sends the entire table.
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| What does distance-vector mean? | It means that the protocol relies on hop count to pick the best path to a remote network. 15 is the max by default, and 16 hops results in it being dropped.
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| Does RIP support VLSM? | Version 1 does not (classful routing), but Version 2 does support VLSM (classless routing)
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| How do you configure RIP? | In global configuration mode:
router rip
network 192.168.115.0
version 2
no auto-summary
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| What does "no auto-summary" mean? | When you enable this feature it will keep your routing protocol from summarizing networks. Summarizing could cause communication problems, especially with discontiguous networks.
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| How do you verify that your protocol is working? | show ip route
show protocols
These commands will give you printouts of routes learned by your routing protocols
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| What are three benefits of OSPF? | Speedy convergence
Less overhead
Quarantine unstable networks to a single area
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| What must be configured properly for OSPF to form an adjacency? | Hello and Dead intervals must match
Area I.D.
Stub area flag
Authentication (password, if you're using one)
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| What is the OSPF point-to-point address? | 224.0.0.5
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| What is the OSPF broadcast address? | 224.0.0.6
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| When you are assigning a process I.D. to OSPF what is the range of numbers you can use? | 1-65,535
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| What does the process I.D. mean when you're configuring it for routing protocols? | Nothing, it's arbitrary
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| How do you configure OSPF? | In global configuration mode:
router ospf 1
network 192.168.115.0 0.0.0.255 area 0
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| When you are configuring routing protocols what does the area number mean? | It is the area that routers will use to identify which "group" they belong to. In order for routers to share routing tables they must have the same area number
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| When assigning an area number what are your options? | 0-4.2 billion. You can also label an area using an ip address format.
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| When you are configuring routing protocols what command should you use to see what addresses are connected to your router? | show ip interface brief
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| What routing protocols are classless? | RIPv2, OSPF, and EIGRP
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| What must be configured properly for EIGRP to form an adjacency? | Identical K values
AS numbers must match
Hello or ack must be received
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| What is advertised (reported) distance? | Metric of a distant network that is learned from a neighbor.
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| What is feasible distance? | Best metric to reach a distant network and includes the metric to the neighbor that advertises that route.
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| EIGRP configuration | (config)#router eigrp 25
(config-router)#network 192.168.0.0 0.0.0.255
(config-router)#no auto-summary
(config-router)#passive-interface fa0/1
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| EIGRP K values metric | K1=bandwidth, K2=load (utilization on path), K3=delay, K4=Reliability, K5=MTU. How to set back to default:
(config-router)#metric weights 010100
(config-router)#do show ip protocols
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| EIGRP Hop Count | Default is 4 links, but can be increased to 255.
(config)#router eigrp 25
(config)#metric maximum-hops 255
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| EIGRP Bandwidth & Delay | Default BW 1544, DLY 20000. If you need to set these to default use the following:
(config-if)#no bandwidth
(config-if)#no delay
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