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32 Cards in this Set
- Front
- Back
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Routing: Router on a stick: can you put encapsulation on the subinterfaces?
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yes. #encapsulation dot1q <vlan>
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Routing: Which routing protocols support autosummarization?
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EIGRP (on by default).
RIP-1 (on by default) RIP-2(on by default) But not OSPF |
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Routing: Which routing protocols allow the engineer to disable autosummarization
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EIGRP and RIP-2.
Does not exist in OSPF. Cannot be disabled in RIP-1 |
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Routing: Which routing protocols support manual route summarization?
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Not RIP-1 (only supported by classless routing protocols) |
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Routing: T/F: When autosummarization is used, it only allows for the summary route to be an entire classful network.
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TRUE, by definition of autosummarization.
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Routing: T/F: When manual summarization is used, it only allows for the summary route to be an entire classful network.
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FALSE. Allows routes to be summarized into any larger grouping.
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Routing: Define Autosummarization
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When advertised on an interface whose IP address is not in network X, routes related to subnets in network X are summarized and advertised as one route. That route is for the entire class A, B, or C network X.
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Routing: A router has multiple routes to the destination in its routing tables. Which one will it choose?
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The most specific (largest subnet mask)
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Routing: An engineer attempts to assign an ip address to a router interface, but the network overlaps with the network assigned to another interface on the same router. What will happen?
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The attempt will be rejected.
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Routing: How do you setup a secondary address on a router interface?
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Interface config mode
#ip address <address> <netmask> secondary |
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Routing: Two requirements for a router to automatically add a route for a connected interface.
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The interface state is up/up
The interface has an IP address assigned |
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Routing: CLI command to add a static route
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ip route <dest network ip> <mask> <next-hop ip or serial interface> [permanent]
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Routing: CLI command to add a default network route
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ip default-network <dest network ip>
Works with classful networks; no mask |
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Routing: Classful routing and default networks - what can go wrong?
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If the packet's destination only matches the default route, the packet will be forwarded only if the router does not know any routes in the classful network.
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Routing: CLI commands to set classless or classful routing
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ip classless
no ip classless |
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Routing: CLI command to allow or deny use of subnet zero
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ip subnet-zero
no ip subnet-zero |
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Routing: CLI command to show routing table
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show ip route
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Routing: CLI command to show how a specific address will be routed
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show ip route <address>
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Routing: CLI command to setup default route
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ip route 0.0.0.0 0.0.0.0 <next-hop ip>
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Routing: Which routing protocols support VLSM? Which do not?
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Do: RIP-2, EIGRP, and OSPF
Do not: RIP-1, IGRP (both are classful) |
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Routing: Which routing protocols support autosummarization?
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RIP-1, RIP-2, EIGRP
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Routing: Which routing protocols have no autosummarization available?
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OSPF
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Routing: CLI command to turn off autosummarization
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no autosummary
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Routing: Under what conditions must you turn off autosummarization?
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Discontiguous networks
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Routing: CLI command for manual route summarization
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ip summary-address eigrp 1 <network> <mask>
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Routing: Technique for auto-summarizing routes
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1. list all the subnets to summarize
2. Find the first n bits that all have in common 3. Make the subnet mask n bits |
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Routing: Define a discontiguous network
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A classful network in which packets sent between at least one pair of subnets must pass through subnets of a different classful network.
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Routing: What is the meaning of an "o" route in the show ip route command?
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on demand route
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Routing: Which two routing protocols aer classful?
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IGRP and RIPv1
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Routing: Which routing protocol provides load balancing?
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EIGRP
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Routing: What IOS command is used to view the current state of the active routing protocol processes?
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show ip protocols
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Routing: IOS command to view real-time RIP routing updates
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debug ip rip
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