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1© 2004, Cisco Systems, Inc. All rights reserved.
IP ADDRESSING AND SUBNETTING
222© 2004, Cisco Systems, Inc. All rights reserved.
• Dada una dirección IP y una mascara de subred, cuantas
subredes hay?...
333© 2004, Cisco Systems, Inc. All rights reserved.
IP Address Review
444© 2004, Cisco Systems, Inc. All rights reserved.
IP Address Review
555© 2004, Cisco Systems, Inc. All rights reserved.
Subdividing the Host Octets of a Class C
Address
666© 2004, Cisco Systems, Inc. All rights reserved.
Subdividing the Host Octets of a Class B
Address
777© 2004, Cisco Systems, Inc. All rights reserved.
Subdividing the Host Octets of a Class A
Address
888© 2004, Cisco Systems, Inc. All rights reserved.
Subnetting Chart (Bit Position and Value)
999© 2004, Cisco Systems, Inc. All rights reserved.
Subnetting Chart (Subnet Mask Identifier)
101010© 2004, Cisco Systems, Inc. All rights reserved.
Subnetting
Mascara /27: 11111111.11111111.11111111.11100000
255.255...
111111© 2004, Cisco Systems, Inc. All rights reserved.
Subnetting Chart
121212© 2004, Cisco Systems, Inc. All rights reserved.
Subnetting Scheme
131313© 2004, Cisco Systems, Inc. All rights reserved.
Find the Subnet Mask
255.240.0.0
255.255.255.224
255.255.255.248
141414© 2004, Cisco Systems, Inc. All rights reserved.
Calculating the Subnet ID
151515© 2004, Cisco Systems, Inc. All rights reserved.
The Logical ANDing Process
161616© 2004, Cisco Systems, Inc. All rights reserved.
  
Finding the Answer Without Using Binary
171717© 2004, Cisco Systems, Inc. All rights reserved.
  
EJEMPLO: 130.4.102.1, MASK 255.255.255.0
181818© 2004, Cisco Systems, Inc. All rights reserved.
  
EJEMPLO: 130.4.102.1, MASK 255.255.255.0
191919© 2004, Cisco Systems, Inc. All rights reserved.
  
TO FIND THE FIRST VALID IP ADDRESS IN THE SUBNET, COPY THE 
SUBN...
202020© 2004, Cisco Systems, Inc. All rights reserved.
  
THE LAST VALID IP ADDRESS IN THE SUBNET CAN BE CALCULATED
EASILY...
212121© 2004, Cisco Systems, Inc. All rights reserved.
  
EJEMPLO :130.4.102.1, MASK 255.255.252.0
222222© 2004, Cisco Systems, Inc. All rights reserved.
  
EJEMPLO :130.4.102.1, MASK 255.255.252.0
232323© 2004, Cisco Systems, Inc. All rights reserved.
FIRST, YOU FIND IS THE MAGIC NUMBER — WHICH IS 256 MINUS THE MASK’S...
242424© 2004, Cisco Systems, Inc. All rights reserved.
  
ADD THE MAGIC NUMBER TO THE INTERESTING OCTET VALUE OF THE
SUBNE...
252525© 2004, Cisco Systems, Inc. All rights reserved.
Determining Subnet, Broadcast Address and Valid Host Range
Example ...
262626© 2004, Cisco Systems, Inc. All rights reserved.
Example 2:
Host: 192.168.100.25 Subnet Mask: 255.255.255.252
Is thi...
272727© 2004, Cisco Systems, Inc. All rights reserved.
EJERCICIOS
• 172.31.100.100, mask 255.255.192.0
• 172.31.200.10, ma...
282828© 2004, Cisco Systems, Inc. All rights reserved.
EJERCICIOS
292929© 2004, Cisco Systems, Inc. All rights reserved.
EJERCICIOS
303030© 2004, Cisco Systems, Inc. All rights reserved.
EJERCICIOS
313131© 2004, Cisco Systems, Inc. All rights reserved.
Gracias por su atención …
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Subnetting

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Transcript of "Subnetting"

  1. 1. 1© 2004, Cisco Systems, Inc. All rights reserved. IP ADDRESSING AND SUBNETTING
  2. 2. 222© 2004, Cisco Systems, Inc. All rights reserved. • Dada una dirección IP y una mascara de subred, cuantas subredes hay? y cuantos host hay por cada subred? • Dada una dirección IP y una mascara de subred, cual es el numero de Subred? • Dada una dirección IP y una mascara de subred, cual es la dirección de broadcast de la Subred? • Dada una dirección IP y una mascara de subred, cual es el rango de direcciones IP válidas? Tipo de Preguntas Subneteo
  3. 3. 333© 2004, Cisco Systems, Inc. All rights reserved. IP Address Review
  4. 4. 444© 2004, Cisco Systems, Inc. All rights reserved. IP Address Review
  5. 5. 555© 2004, Cisco Systems, Inc. All rights reserved. Subdividing the Host Octets of a Class C Address
  6. 6. 666© 2004, Cisco Systems, Inc. All rights reserved. Subdividing the Host Octets of a Class B Address
  7. 7. 777© 2004, Cisco Systems, Inc. All rights reserved. Subdividing the Host Octets of a Class A Address
  8. 8. 888© 2004, Cisco Systems, Inc. All rights reserved. Subnetting Chart (Bit Position and Value)
  9. 9. 999© 2004, Cisco Systems, Inc. All rights reserved. Subnetting Chart (Subnet Mask Identifier)
  10. 10. 101010© 2004, Cisco Systems, Inc. All rights reserved. Subnetting Mascara /27: 11111111.11111111.11111111.11100000 255.255.255.224
  11. 11. 111111© 2004, Cisco Systems, Inc. All rights reserved. Subnetting Chart
  12. 12. 121212© 2004, Cisco Systems, Inc. All rights reserved. Subnetting Scheme
  13. 13. 131313© 2004, Cisco Systems, Inc. All rights reserved. Find the Subnet Mask 255.240.0.0 255.255.255.224 255.255.255.248
  14. 14. 141414© 2004, Cisco Systems, Inc. All rights reserved. Calculating the Subnet ID
  15. 15. 151515© 2004, Cisco Systems, Inc. All rights reserved. The Logical ANDing Process
  16. 16. 161616© 2004, Cisco Systems, Inc. All rights reserved.    Finding the Answer Without Using Binary
  17. 17. 171717© 2004, Cisco Systems, Inc. All rights reserved.    EJEMPLO: 130.4.102.1, MASK 255.255.255.0
  18. 18. 181818© 2004, Cisco Systems, Inc. All rights reserved.    EJEMPLO: 130.4.102.1, MASK 255.255.255.0
  19. 19. 191919© 2004, Cisco Systems, Inc. All rights reserved.    TO FIND THE FIRST VALID IP ADDRESS IN THE SUBNET, COPY THE  SUBNET NUMBER, BUT ADD 1 TO THE FOURTH OCTET. EJEMPLO: 130.4.102.1, MASK 255.255.255.0
  20. 20. 202020© 2004, Cisco Systems, Inc. All rights reserved.    THE LAST VALID IP ADDRESS IN THE SUBNET CAN BE CALCULATED EASILY: COPY THE BROADCAST ADDRESS, EXCEPT SUBTRACT 1 FROM THE FOURTH OCTET. EJEMPLO: 130.4.102.1, MASK 255.255.255.0
  21. 21. 212121© 2004, Cisco Systems, Inc. All rights reserved.    EJEMPLO :130.4.102.1, MASK 255.255.252.0
  22. 22. 222222© 2004, Cisco Systems, Inc. All rights reserved.    EJEMPLO :130.4.102.1, MASK 255.255.252.0
  23. 23. 232323© 2004, Cisco Systems, Inc. All rights reserved. FIRST, YOU FIND IS THE MAGIC NUMBER — WHICH IS 256 MINUS THE MASK’S INTERESTING OCTET. 256 – 252, MAGIC NUMBER OF 4. THE MULTIPLE OF THE MAGIC NUMBER CLOSEST TO BUT NOT MORE THAN THE ADDRESS’S INTERESTING OCTET IS THE SUBNET’S INTERESTING OCTET VALUE. EJEMPLO :130.4.102.1, MASK 255.255.252.0
  24. 24. 242424© 2004, Cisco Systems, Inc. All rights reserved.    ADD THE MAGIC NUMBER TO THE INTERESTING OCTET VALUE OF THE SUBNET NUMBER AND SUBTRACT 1. THE RESULT IS THE BROADCAST ADDRESS’S VALUE IN THE INTERESTING OCTET. IN THIS CASE, THE VALUE IS 100 + 4 (MAGIC NUMBER) – 1 = 103. EJEMPLO :130.4.102.1, MASK 255.255.252.0
  25. 25. 252525© 2004, Cisco Systems, Inc. All rights reserved. Determining Subnet, Broadcast Address and Valid Host Range Example 1: Host: 172.16.10.33 Subnet Mask: 255.255.255.224 Is this a Class A, Class B or Class C address? Therefore how many bits make up the Network portion? How many bits are in the Subnet Mask? How many bits are left for Host addresses? How many separate addresses in each subnet? Which address represents the whole subnet? Which address is used to broadcast to the subnet? Which addresses are left in the valid host range? First Valid: Last Valid: Class B 16 11111111.11111111.11111111.11100000 = 27 5 32 172.16.10.32 172.16.10.63 172.16.10.33 172.16.10.62
  26. 26. 262626© 2004, Cisco Systems, Inc. All rights reserved. Example 2: Host: 192.168.100.25 Subnet Mask: 255.255.255.252 Is this a Class A, Class B or Class C address? Therefore how many bits make up the Network portion? How many bits are in the Subnet Mask? How many bits are left for Host addresses? How many separate addresses in each subnet? Which address represents the whole subnet? Which address is used to broadcast to the subnet? Which addresses are left in the valid host range? Determining Subnet, Broadcast Address and Valid Host Range
  27. 27. 272727© 2004, Cisco Systems, Inc. All rights reserved. EJERCICIOS • 172.31.100.100, mask 255.255.192.0 • 172.31.200.10, mask 255.255.248.0 • 192.168.100.100, mask 255.255.255.248
  28. 28. 282828© 2004, Cisco Systems, Inc. All rights reserved. EJERCICIOS
  29. 29. 292929© 2004, Cisco Systems, Inc. All rights reserved. EJERCICIOS
  30. 30. 303030© 2004, Cisco Systems, Inc. All rights reserved. EJERCICIOS
  31. 31. 313131© 2004, Cisco Systems, Inc. All rights reserved. Gracias por su atención …
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