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CCNA Route Protocols

Routing Protocols (RIP, OSPF, EIGRP)

What does RIP stand for? Routing Information Protocol
What kind of routing protocol is RIP? Distance-vector
When does RIP send information about its routing table? RIP sends an update every 30 seconds, and it sends the entire table.
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.
Does RIP support VLSM? Version 1 does not (classful routing), but Version 2 does support VLSM (classless routing)
How do you configure RIP? In global configuration mode: router rip network version 2 no auto-summary
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.
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
What are three benefits of OSPF? Speedy convergence Less overhead Quarantine unstable networks to a single area
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)
What is the OSPF point-to-point address?
What is the OSPF broadcast address?
When you are assigning a process I.D. to OSPF what is the range of numbers you can use? 1-65,535
What does the process I.D. mean when you're configuring it for routing protocols? Nothing, it's arbitrary
How do you configure OSPF? In global configuration mode: router ospf 1 network area 0
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
When assigning an area number what are your options? 0-4.2 billion. You can also label an area using an ip address format.
When you are configuring routing protocols what command should you use to see what addresses are connected to your router? show ip interface brief
What routing protocols are classless? RIPv2, OSPF, and EIGRP
What must be configured properly for EIGRP to form an adjacency? Identical K values AS numbers must match Hello or ack must be received
What is advertised (reported) distance? Metric of a distant network that is learned from a neighbor.
What is feasible distance? Best metric to reach a distant network and includes the metric to the neighbor that advertises that route.
EIGRP configuration (config)#router eigrp 25 (config-router)#network (config-router)#no auto-summary (config-router)#passive-interface fa0/1
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
EIGRP Hop Count Default is 4 links, but can be increased to 255. (config)#router eigrp 25 (config)#metric maximum-hops 255
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
Created by: marallander