Classification of route selection protocols-implement VLSM division in RIP v2

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| Chapter 2 |
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Classification of route selection protocols
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RIP V2 features
Basic configuration of RIP v2
* *** RIP v2 implements VLSM Division (Variable Length subnet mask)
Summary of CIDR routes implemented by RIP v2
RIP 2 implements load balancing with equal hop paths
RIP2 authentication Configuration
RIP2 configuration passive interface to suppress route update
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IP address planning
Some D-class selection protocols used for Multicast Routing
OSPF-224.0.0.5 224.0.0.6
RIPv2-224.0.0.9
EIGRP-224.0.0.10
Calculate the number of subnets:
The n power of 2 (n indicates the number of digits of the subnet)
Relationship between subnet bits and mask
1----------128
2----------192
3----------224
4----------240
5----------248
6----------253
7----------254
8----------255
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Vlsm experiment:
192.168.49.0/24 CIDR Block
(25 pc) (49.1) R1 (49.97) --------- (98)
|
(25 pc) (49.33) R2 (49.101) ------ (102) R4--------R5 (ISP)
|
(25 PCs) (49.65) R3-49.105) ------ (106)
Router4 S0/0 <----> Router5 S0/0
Router1 S0/0 <----> Router4 S0/1
Router2 S0/0 <----> Router4 S0/2
Router3 S0/0 <----> Router4 S0/3
VPCS V0/1 <----> Router1 F1/0
VPCS V0/2 <----> Router2 F1/0
VPCS V0/3 <----> Router3 F1/0
VPCS V0/4 <----> Router4 F1/0
VPCS V0/5 <----> Router5 F1/0
Subnet, with R1 R2 R3, so at least the number of network segments is required: 192.168.49.0/27 (8 subnets, 32 IP addresses per subnet)
The fourth subnet is divided twice, 192.168.96/30 (eight subnets, each with four IP addresses)
Ip Address:
192.168.49.0-31
192.168.49.32-63
192.168.49.64-95
192.168.49.96-127
192.168.49.128- 159
IP address 192.168.49.160-191
192.168.49.192-223
192.168.49.0000-255
192.168.49.96-127 perform secondary subnet division
192.168.49.96-99
192.168.49.100-103
192.168.49.104-107
192.168.49.108-128
192.168.49.112-115
192.168.49.1 16-119
192.168.49.120-123
192.168.49.1 24-127
Configuration command:
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For R1:
En
Conf t
Ip domain-lookup
Ip classless (supports subnet division)
Ip subnet-zero
Hostname R1
R1 (config) # int loopback1
R1 (config-if) # ip add 192.168.49.1 too many then
R1 (config-if) # no shu
R1 (config-if) # exi
R1 (config) # int s0/0
R1 (config-if) # ip add 192.168.49.97 255.255.255.252
R1 (config-if) # no shut
R1 (config-if) # exi
Router rip
Version 2
Network 192.168.49.0
Network 192.168.49.96
End
Sh run
For R2:
En
Conf t
Host R2
No ip domain-lookup
Ip classless
Ip subnet-zero
Int loopback1
Ip add 192.168.49.33 without authorization
No shu
Exi
Int s0/0
Ip add 192.168.49.101 255.255.255.252
No shu
Exi
Router rip
Version 2
No auto-summary
Net 192.168.49.32
Net 192.168.49.100
End
Sh ip rou
For R3:
En
Conf t
Host R3
No ip domain-lookup
Ip classless
Ip subnet-zero
Int loopback1
Ip add 192.168.49.65 without authorization
No shu
Exi
Int s0/0
Ip add 192.168.49.105 255.255.255.252
No shu
Exi
Router rip
Version 2
No auto-summary
Net 192.168.49.64
Net 192.168.49.104
End
Sh ip rou
For R4:
En
Conf t
Host R4
No ip domain-lookup
Ip classless
Ip subnet-zero
Int s0/1
Ip addr 192.168.49.98 255.255.255.252
No shu
Exi
Int s0/2
Ip addr 192.168.49.102 255.255.255.252
No shu
Exi
Int s0/3
Ip addr 192.168.49.106 255.255.255.252
No shu
Exi
Router rip
Version 2
No auto-summary
Network 192.168.49.96
Net 192.168.49.100
Net 192.168.49.104
End
Sh ip int B
Sh ip rou
For R5:
En
Conf t
No ip domain-lookup
Ip classless
No subnet-zero
Router rip
Version 2
No auto-summary (if route aggregation is not disabled, you can only learn the large network 192.168.49.0 on R5, And the subnetwork we divide cannot be learned)
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Question:
A large number of VLSM applications will lead to the constant expansion of upper-layer route tables