... bits.
15
CIDR and Route Summarization
The 19 2 .16 8.0.0/20, summarized or aggregated route includes all the
networks belonging to customers A, B, C, and D.
19 2 .16 8.0.0/23, 19 2 .16 8.2.0/23, 19 2 .16 8.4.0/22, ... 19 2 .16 8.2.0/23, 19 2 .16 8.4.0/22, and 19 2 .16 8.8.0/ 21 are all
subnets of 19 2 .16 8.0.0/20
21
Any of these /16 subnets can be subnetted further.
For example the 10 .1. 0.0 /16 subnet is subnetted again ... subnets
(17 2,30 .1. 0/24, 17 2.30.2.0/24 and 17 2.30.3.0/24) as 17 2.30.0.0.
R3 applies the /8 mask (classful routing protocol)
8
Classful Routing Protocol
Routing protocols, such as RIPv1, only...
... from R3:
Connected to neighbor R1 on network 10 .3.0.0 /16 , cost of 5
Connected to neighbor R4 on network 10 .7.0.0 /16 , cost of 10
Has a network 10 .6.0.0 /16 , cost of 2
R1 Processes the LSPs from R3
Red: ... discussed in the following
chapter.
37
20
10
Determining the
Shortest Path
Network 10 .9.0.0 /16
via R2 Serial 0/0/0
at a cost of 30
11
Link-State Routing Process
1. Each router learns about ...
topology and
computes the best
path to each
destination network.
Link State Database for R1
36
5
10
Determining the
Shortest Path
Network 10 .8.0.0 /16 via
R3 Serial 0/0 /1 at a
cost of 17
2
12
Step...
... its routing table that
l matches 19 2 .16 8 .1. 1, which is the ping packet’s destination IP address.
R2# ping 19 2 .16 8 .1. 1
!!!!
R2# show ip route
17 2 .16 .0.0/24 is subnetted, 2 subnets
C 17 2 .16 .1. 0 ... communicate with any device on the 17 2 .16 .3.0/24 and
17 2 .16 .2.0/24 networks.
Ÿ R2 can communicate with any device on the 17 2 .16 .1. 0/24,
17 2 .16 .2.0/24, and 19 2 .16 8 .1. 0/24 networks.
Ÿ R3 can communicate ... Protocol
FastEthernet0/0 17 2 .16 .1. 1 YES manual up up
Serial0/0/0 17 2 .16 .2.2 YES manual up up
FastEthernet0 /1 unassigned YES manual administratively down down
Serial0/0 /1 192 .16 8 .1. 2 YES manual up up
R3#...
... an update about networks 10 .1. 0.0 with a metric of 2 (new) and
10 .2.0.0 with a metric of 1 out the Serial 0/0 /1 interface.
Receives an update from R1 about network 10 .1. 0.0 on Serial 0/0/0. ... interface
with a metric of 1
Receives an update from R1 about network 10 .1. 0.0 on Serial 0/0/0
with a metric of 1
Stores network 10 .1. 0.0 in the routing table with a metric of 1
Receives an update ... network 10 .4.0.0 on Serial 0/0 /1
with a metric of 1
Stores network 10 .4.0.0 in the routing table with a metric of 1
sends receivesreceives
33
Routing Table Maintenance
Routing protocols...
... summarization:
19 2 .16 8 .10 .0/24 for FastEthernet0/0, Serial0/0/0
Summarizing with metric 216 9856
17 2 .16 .0.0 /16 for Serial0/0 /1
Summarizing with metric 2 816 0
Maximum path: 4
Routing for Networks:
17 2 .16 .0.0
19 2 .16 8 .10 .0
Routing ... both R1 and R2 are
using the same EIGRP 1routing process and both routers are now sending
updates on the 17 2 .16 .0.0 network.
R1(config-router)# network 17 2 .16 .0.0
R2(config-router)# network 17 2 .16 .0.0
%DUAL-5-NBRCHANGE: ... details, please read
the chapter/ curriculum.
Book:
RoutingProtocols
and Concepts
By Rick Graziani and
Allan Johnson
ISBN: 1- 58 713 -206-0
ISBN -13 : 978-58 713 -
206-3
23
EIGRP Bounded...
... cisco
Router(config)#hostname R1
R1(config)#
R1( fi )#li l 0
R1(
con
fi
g
)#li
ne conso
l
e
0
R1(config-line)#password cisco
R1(config-line)#login
R1(config
-
line)#exit
R1(config
-
line)#exit
R1(config)#line ... hexadecimal digit.
ITE PC v4.0
Chapter 1
19
â 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Configure Devices and Apply Addresses
ITE PC v4.0
Chapter 1
41
â 2007 Cisco Systems, Inc. ... power
ITE PC v4.0
Chapter 1
5
â 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
or is restarted.
Configuration register: 0, 1, and 2 and above
ITE PC v4.0
Chapter 1
22
â 2007 Cisco...