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

Gateway of last resort is not set
I 203.150.100.0/24 [100/8576] via 201.150.101.2, 00:01:13, Serial0/0
C 201.150.101.0/24 is directly connected, Serial0/0
I 200.150.100.0/24 [100/10002101] via 201.150.101.2, 00:01:13,
Serial0/0
I 201.150.100.0/24 [100/10576] via 201.150.101.2, 00:01:13, Serial0/0
C 200.150.101.0/24 is directly connected, Ethernet0/0
thompson#
Notice our our RIP (R) routes are “redistributed” as IGRP (I) routes to the right of
the ritchie router.
Supplemental Lab or Challenge Activity:
1. When redistributing IGRP with IGRP what happens if you only redistribute on one
side (redistribute igrp 38 within 18 but not redistributing igrp 18 within 38)?
2. Repeat this lab with a 26 bit subnet mask. Why does it or doesn’t it work very well
now?
So What Did I Learn Here?
In this lab you started to learn the basics about redistribution with routing protocols.
Sorry to tell you this is just the tip of the iceberg. Very few networks use the exact same
routing protocol throughout the entire network (more likely in large networks). In fact
later when you redistribute other protocols you will also have to put metrics in as well.
Whew! RIP…done. IGRP…done. There are three other routing protocols we need to
discuss in the next few labs: EIGRP, OSPF, and BGP. These three are covered in-depth
in the upper-level CISCO courses but you should be aware of the basics regarding these
protocols and for what they are used.
Guest Router Name Derivation
In 1969 Dennis Ritchie and Ken Thompson invented the UNIX operating System. If they
only knew then what they were doing…creating software that would help put a man on
the moon, transmit pictures back from Mars, and the solar system…oh, yeah…and give a
green light to hackers everywhere. Nobody said anything was perfect.
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