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CCNA 2 - CH 7 RIPv2
Routing Protocols and Concepts
18
Computer Networking
08/25/2011

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Cards

Term
Three new features of RIPv2 over RIPv1
Definition
Next hop included in the routing updates
Use of multicast in sending updates
Authentication available
Term
What is a loop back interface?
Definition
Software-only interface used to emulate an interface.
Term
What is a null interface and how is it represented?
Definition
A null interface is an interface which does not have a physical existence but can be used to designate a route as "null0" Remember that a static route requires a valid exit interface. Using a null interface allows a router to represent a static route in RIP.
Term
Where is "redistribute static" declared and what does it do?
Definition
router "routing protocol" ie rip
R1(config-router)# redistribute static
This command allows static routes to be sent via routing updates via dynamic routing protocols.
Term
What command is used to determine the messages being sent and received by RIP?
Definition
R2# debug ip rip
Term
What is a boundary router?
Definition
A router that sits on the edge of two discontiguous classful networks. It can also be a router which sits at the edge of two different networks that have different routing protocols.
Term
What message does RIPv1 send when a static route of 192.168.0.0/16 is statically configured and redistribute static is also configured on the router?
Definition
The 192.168.0.0/16 route is not sent with RIPv1 updates because the route is less than the classful mask.
Term
What four pieces of data are different in a RIPv2 update vs an RIPv1 update?
Definition
Subnet mask, next hop address, version and route tag
Term
By default what does a router configured with RIPv2 do with an update it receives via RIPv1? What can be done to change this action?
Definition
RIPv2 ignores RIPv1 updates
"ip rip send" & "ip rip receive" can be used to force compatibility between different versions
Term
What command enables RIPv2?
Definition
version 2
Term
What address is used to send RIPv1 updates?
What address is used to send RIPv2 updates?
Definition
RIPv1 -- Broadcast
RIPv2 -- Multicast
Term
Four ways to verify and troubleshoot RIPv2. Starting with the basics --
Definition
1. Make sure that all the links are up
2. Check the cabling
3. Make sure the correct IP address and subnet mask are on each interface
4. remove any configuration commands that are no longer necessary or have been replace by other commands.
Term
Which command can be used to verify convergence?
Definition
R1# show ip route
Term
If a network is missing from the routing table, it is often because an interface is down or incorrectly configured. Which command can give you thing information?
Definition
show ip interface brief
Term
Command which tells whether RIP is enabled, the version of RIP, status of automatic network summarization, and the networks which were included in the network statements
Definition
R1# show ip protocols
Term
Command to examine the contents of the routing updates.
Definition
debug ip rip
Term
An easy way to verify connectivity is which command
Definition
ping
Term
Top 6 commands to troubleshoot routing problems
Definition
1. show ip route
2. show ip protocols
3. show ip interface brief
4. show running-config
5. ping
6. debug ip route