09-vlsmx - Óbudai Egyetem

doctorheavenlyNetworking and Communications

Oct 24, 2013 (3 years and 10 months ago)

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Címszámítás

Számítógép hálózatok gyakorlata

ÓBUDAI EGYETEM

2011 TAVASZI FÉLÉV

9. LABORGYAKORLAT

PRÉM DÁNIEL

Variable

Length

Subnet

Mask


Calculating with variable length



More
precise

as

the

constant

length

subnet



wastes

less IP
addresses



RIPv1
does

not

support

VLSM, RIPv2 is
required


Variable

Length

Subnet

Mask


Iterate

subnetting


pl.: /24


254
machines

2 /25


2 x 126
machines

2

/
26


2 x
62
machines

4
/
28


2 x
16
machines

IP
address

calculation

We have a
204.15.5.0/24
„C”
class

address
.
Demands
: 4
subnets

with
:
60, 25, 10
and

2
hosts
.


Constant

length

Variable

length

(VLSM)

204.15.5.0/26

255.255.255.192

.1

.62

.63

204.15.5.0/26

255.255.255.192

.1

.62

.63

204.15.5.64/26

255.255.255.192

.65

.126

.127

204.15.5.64/27

255.255.255.224

.65

.94

.95

204.15.5.128/26

255.255.255.192

.129

.190

.191

204.15.5.96/28

255.255.255.240

.97

.110

.111

204.15.5.192/26

255.255.255.192

.193

.254

.255

204.15.5.112/30

255.255.255.252

.113

.114

.115