Learning by Doing: CISCO Certified Network ... - SCN Research

interface Serial0/0
no ip address
no ip directed-broadcast
no ip mroute-cache Disables fast switching of IP packets 4
shutdown
!
interface Serial0/1
no ip address
no ip directed-broadcast
shutdown
!
ip classless Disables classless routing behavior 5
!
line con 0
transport input none
line aux 0
line vty 0 4
!
no scheduler allocate
end
Router#
Supplemental Lab or Challenge Activity:
1. Repeat this lab with a pre-configured router and watch for changes.
2. How do you think changing the configuration register would affect the boot
sequence?
3. Go out to www.cisco.com and try to find configuration register settings to alter
the way the boot sequence happens with your router.
4. Several of the explanations above are numbered 1-5 . Go out to CISCO’s website
and find out what they do.
5. Two commands were included by default on your router script above (transport
input none and no scheduler allocate). Go out to CISCO’s website and find out
what they do.
So What Have I Learned Here?
In this lab you learned about the router boot sequence. Your textbook will also show you
some methods for changing how the router boots, loading IOS’s and other stuff. I have
also attached some diagrams of motherboards for CISCO 2500 and 2600 routers. You
probably won’t find those anywhere…let’s just say a little inside bird told me about this.
Here are some really good, but technical books, if you want some more information.
Bollapragada, Vijay, Murphy, C. and White, R. (2000). Inside CISCO IOS Software
Architecture. Indianapolis, IND: CISCO Press. ISBN: 1-57870-181-3.
Coulibaly, M. (2000). “Chapter 8: The Hardware-Software Relationship” in CISCO IOS
Releases: The Complete Reference. Indianapolis, IND: CISCO Press. ISBN 1-
57870-179-1.
Held, Gil (2000). CISCO Router Performance: Field Guide. New York: McGraw-Hill.
ISBN: 0-07-212513-6.
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