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Implementing Cisco IP Routing (ROUTE) Foundation Learning Guide:
Foundation learning for the ROUTE 642-902 Exam
First Edition
Copyright © 2010 Cisco Systems, Inc.
ISBN-10: 1-58705-882-0
ISBN-13: 978-1-58705-882-0
Warning and Disclaimer
Every effort has been made to make this book as complete and as accurate as possible, but no warranty
or fitness is implied. The information provided is on an "as is" basis. The author and the publisher shall
have neither liability nor responsibility to any person or entity with respect to any loss or damages arising
from the information contained in this book or from the use of the CD or programs accompanying it.
When reviewing corrections, always check the print number of your book. Corrections are made to printed
books with each subsequent printing.
First Printing: June 2010
Correction dated April 29, 2014 for correction dated June 25, 2012
Pg
Error
Correction
849
Correction stated for Chapter 8, Figure 852, First line of second table in figure
Correction Should read:
Reads
Decimal
Decimal
172
16
172
172
16
102
1
1
Updated 04/29/2014
Corrections for March 25, 2014
Pg
Error
Correction
72
Chapter 2, Figure 2-5, IP EIGRP Neighbor
Table, Router A, Interface
Should read:
Reads:
FastEthernet 0/0
FastEthernet 0
81
Chapter 2, Figure 2-16, second metric line
Should read:
Reads:
192.168.6.0 IGRP metric 2000 -------192.168.5.0 EIRGP metric 512000
192.168.5.0 IGRP metric 2000 --------192.168.5.0
EIRGP metric 512000
Corrections for December 19, 2013
Pg
Error
Correction
361
Chapter 4, Table 4-8, Second parameter
description in table
Should read:
Reads:
(Optional) Specified the IP address. This allows
filtering of networks according to the IP address of the
router supplying the routing information. For OSPF
this field specified the OSPF router-id, not the
address, of the router originating the route. (Note that
this OSPF caveat is not in the Cisco documentation for
this Command.)
(Optional) Specified the IP address. This
allows filtering of networks according to
the IP address of the router supplying the
routing information.
361
Chapter 4, Table 4-8, Last parameter
description in table
Should read:
Reads:
(Optional) The number or name of a standard access
list to be applied to the incoming routing updates.
Allows filtering of the networks being advertised.
(Optional) The number or name of a
standard or extended access list to be
Updated 04/29/2014
363
applied to the incoming routing updates.
Allows filtering of the networks being
advertised.
(Note that the Cisco documentation states that an
extended access list can also be identified here, but
this option is not available on the routers.)
Chapter 4, First two full sentences above
Example 4-6
Should read:
Reads:
The distance 90 10.0.0.0 0.0.0.255, distance 110
10.11.0.0 0.0.0.255, and distance 130 10.11.12.0
0.0.0.255 commands set the administrative distance
to 90, 110, and 130, respectively, for all routes
originated by routers with specific OSPF router-id’s.
For example, routes originated by a router with OSPF
router-id 10.10.0.1 will have an administrative
distance of 90, and routes originated by a router with
OSPF router-id 10.11.12.1 will have an administrative
distance of 130.
The distance 90 10.0.0.0 0.0.0.255,
distance 110 10.11.0.0 0.0.0.255, and
distance 130 10.11.12.0 0.0.0.255
commands set the administrative distance
to 90, 110, and 130, respectively, for all
routes learned from routers with specific
addresses; notice that the router’s
addresses are specified from least to the
most specific. For example, routes form a
router with address 10.10.0.1 will have an
administrative distance of 90, and routes
from a router with address 10.11.12.1 will
have an administrative distance of 130.
Corrections for June 14, 2013
Pg
Error
Correction
151
Chapter 2, Last Paragraph, First Two
Sentences
Should read:
Reads:
Recall that the router uses the first, by key number,
Recall that the router uses the first, by key valid key for sending packets. As a result of this
configuration, Router R1 will use key 1 for sending,
number, valid key for sending packets. As
a result of this configuration, Router R1 will from January 1 to 31, 2009. Key 2 is valid for sending
as of 4:00 a.m. on January 25, 2009, but it won’t be
use key 1 for sending, from January 1 to
used until key 1 is no longer valid, at 4:00 a.m. on
31, 2009, and will used key 2 for sending
January 31, 2009.
Updated 04/29/2014
as of 4:00 a.m. on January 31, 2009.
Corrections for August 8, 2012
Pg
Error
Correction
548
Chapter 6, Second Bullet point
Should read:
Reads:

access-list 20 deny 172.16.0.0
0.31.255.255

access-list 20 deny 172.16.0.0 0.15.255.255
Corrections for June 25, 2012
Pg
Error
Correction
849
Chapter 8, Figure 8-52, First line in figure
Should read:
Reads
Decimal
172
16
101
1
Decimal
172
16
102
1
Corrections for May 15, 2012
Pg
Error
Correction
5
Chapter 1, Figure 1-1, Last Box
Should read:
Label reads:
Networked Infrastructure Layer
Interactive Services Layer
Updated 04/29/2014
Corrections for April 10, 2012
Pg
Error
Correction
729
Example 8-16, 5th to last line
Should read:
Reads:
*Aug 13 14:00:07.428: ICMPv6-ND:
*Aug 13 14:00:07.428: ICMPv6-ND:
prefix=2001:1::/64 onlink autoconfig
prefix=2001:1:1001::/64 onlink autoconfig
Corrections for January 30, 2012
Pg
Error
Correction
73
Chapter 2, Second Paragraph, Third
Sentence
Should read:
Reads:
In other words, it must not loop back to the local
router.
In other words, it must not loop back to
the current successor.
Corrections for August 16, 2011
Pg
Error
Correction
88
Chapter 2, Example 2-2, last line
Should read:
Reads:
interface Serial0/0/1
interface Serial0/0/2
Corrections for April 29, 2011
Pg
Error
Correction
396
Example 4-25, last two lines
Should read:
Updated 04/29/2014
Reads:
ip prefix-list PFX1 permit 10.0.0.0/14 le 16
ip prefix-list PFX1 permit 10.0.0.0/14
ip prefix-list PFX2 permit 10.8.0.0/14 le 16
ip prefix-list PFX2 permit 10.8.0.0/14
Corrections for January 13, 2011
Pg
Error
Correction
95
Chapter 2, Last Bullet Point, Second
Sentence
Should read:
Reads:
This is the length of time since EIRGRP last advertised
this network to this router.
This is the length of time Because EIRGRP
last advertised this network to this router.
123
251
Chapter 2, Figure 2-26
Should be:
R2 Fa0/0 interface and label 172.16.3.1/24
are on the left side of router R3
R2 Fa0/0 interface and label 172.16.3.1/24 should be
on the right side of router R3
Chapter 3, Figure 3-31
Should read:
Reads:
10.1.2.0/24
10.x.2.0/24 between router R2 and R4 on
right side of figure
275
Chapter 3, OSPF LSDB for Virtual Links,
First paragraph
Reads:
Figure 3-44 presents another example
network. The configurations for Routers
R1 and R3 are provided in Example 3-30.
275
Chapter 3, Figure 3-44, OSPF Virtual Link
Across Area 1
Change link between R2 and R3
Should read:
Figure 3-44 presents another example network.
Partial configurations for Routers R1 and R3 are
provided in Example 3-30.
Change the link between R2 and R3 to a “Cloud” with
the label “Frame Relay” keeping existing labeling on
the link (addresses, cost, interface name, etc)
Updated 04/29/2014
R2
291
Should read:
First paragraph
Figure 3-52 illustrates another example network, used
to illustrate an NSSA LSDB. Partial configuration of
Routers R1, R2, and R3 are provided in Example 3-40.
Figure 3-52 illustrates another example
network, used to illustrate an NSSA LSDB.
The configuration of Routers R1, R2, and
R3 are provided in Example 3-40.
Chapter 3, Figure 3-52, OSPF NSSA
Example Network
Change link between R2 and R3
Change the link between R2 and R3 to a “Cloud” with
the label “Frame Relay” keeping existing labeling on
the link (addresses, cost, interface name, etc)
R2
362
R3
Chapter 3, OSPF NSSA LSDB,
Reads:
291
Frame
Relay
Chapter 4, Last paragraph before Example
4-6
Reads:
In example 4-6, the distance ospf
external 100 inter-area 100 intra-area
100 command sets the administrative
distance for external, interarea, and intraarea OSPF routes to 100 (default values
are 110). The distance 90 10.0.0.0
0.0.0.255, distance 110 10.11.0.0
1.1.1.255, and distance 130 10.1
1.12.0 0.0.0.255 commands set the
Frame
Relay
R3
Should read:
In example 4-6, the distance ospf external 100
inter-area 100 intra-area 100 command sets the
administrative distance for external, interarea, and
intra-area OSPF routes to 100 (default values are
110). The distance 90 10.0.0.0 0.0.0.255,
distance 110 10.11.0.0 1.1.1.255, and distance
130 10.11.12.0 0.0.0.255 commands set the
administrative distance to 90, 110, and 130,
respectively, for all rotes learned from routers with
specific addresses. For example, routes from a router
with address 10.0.0.1 will have an administrative
distance of 90, and routes from a router with address
Updated 04/29/2014
administrative distance to 90, 110, and
10.11.12.1 will have an administrative distance of
130, respectively, for all rotes learned from 130.
routers with specific addresses: notice that
the router’s addresses are specified from
least to the most specific. For example,
routes from a router with address
10.10.0.1 will have an administrative
distance of 90, and routes from a router
with address 10.11.12.1 will have an
administrative distance of 130.
525
Chapter 6, Example 6-1, last row in figure
Align last row with the previous row
Incorrectly aligned
596
Chapter 7, First paragraph Second
sentence
Reads:
Should read:
We will also discover how services such as NAT can
impact the network design.
We will also discover how services such as
can impact the network design.
This errata sheet is intended to provide updated technical information. Spelling and grammar misprints
are updated during the reprint process, but are not listed on this errata sheet.
Updated 04/29/2014
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