The success of dynamic routing depends on two basic router functions:
- Maintenance of a routing table
- Timely distribution of knowledge-in the form of routing
updates-to other routers
Dynamic routing relies on a routing protocol to share knowledge. A
routing protocol defines the set of rules used by a router when it
communicates with neighboring routers. For example, a routing protocol
describes:
- How updates are sent
- What knowledge is contained in these updates
- When to send this knowledge
- How to locate recipients of the updates
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Interactive
Lab Activity
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In
this router lab activity, you will get the opportunity to
do step by step configuration of Router A (lab_A) in the
lab topology. Try to complete the entire lab without your
notes or journal. However, if you do not know a step, and
have used the curriculum, your notes, and your journal to
try to figure it out, you may use the "Run Demo"
button, which will show you the configuration sequence in
red letters. Note that this sequence of configuration
steps is only one of many correct sequences.
How does
this Activity differ from a real router?
- Follow
the steps EXACTLY in order as they are presented. In a
real router, and in an upcoming activity, you can
enter the commands in many different, but correct
sequences. In this activity, we "guide you"
a little more.
- There is
no context sensitive help "?"
- Remember
that it is not enough to configure the ip address on
an interface, you must also issue a "no
shutdown" command.
- You must
use exit;
CONTROL-Z does not work
- This lab
requires the COMPLETE IOS command and not the
abbreviations that you will certainly use after you
have learned a basic set of IOS commands. For example,
to enter global configuration mode, you must type
"configure
terminal"
, however, once you are experienced with routers,
"config
t"
will be fine.
- After
you type a command, hit ENTER. You will either be
allowed to continue to the next step or it will give
you an error message, which may give you a hint to
help you to correct the error. If this fails, you
should then use the "Run Demo"
- When
asked to configure the console port, the correct
sequence is "line console 0", then
"login", then "password cisco."
If you had been asked to configure telnet, the command
sequence is "line vty 0 4", then
"login", then "password cisco."
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Interactive
Lab Activity
(Flash, 412 kB) |
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In
this online lab activity you will configure router Lab-A
from the standard Semester 2 topology. You must perform
this configuration from the command line by yourself
without the use of any notes, only the network topology.
You may use the router help facility (?) but remember only
a certain limited set of IOS commands will actually be
available. Your goal will be to configure the router
correctly as quickly as possible. This activity is meant
to be practice for the actual hands-on router lab while
other students are using all the routers. Remember, there
is no substitute for using real routers.
There are a
few things to note. First, while the commands may be
entered in a wide variety of orders, there are certain IOS
commands, which must precede others. For example, you must
type config t
before configuration commands can be
entered; and you must type
exit (CTRL-Z will not work in
this activity) to go back to a different mode. The only
way to edit a line before hitting ENTER is to backspace
(the other normal IOS editing options are not functional).
Finally, while a few common abbreviations have been
accepted, most IOS commands must be typed completely.
Good
Luck!
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