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2010 Mission Critical Network Design Seminar TP01:Introduction to Ethernet Networking
Ethernet Fundamentals
What is Ethernet?
What is the OSI Model?
What is the OSI Model? ,[object Object],[object Object],[object Object],[object Object],[object Object]
OSI Reference Model… 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical Frames Packets Segments Data Data Data Bits
OSI Reference Model… 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical Ethernet IP Internet Protocol TCP Port 80 HTTP Web Application CAT 5 Cable Ethernet IP Internet Protocol UDP Port 161/162 SNMP Network Mgmt CAT 5 Cable
OSI Reference Model… 1) Physical 1) Physical 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application
OSI Reference Model… 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical Ethernet
What is Ethernet?
What is Ethernet? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is Ethernet? ,[object Object],? Server 1 Server 2
What is Ethernet? ,[object Object],[object Object],[object Object],[object Object],Ethernet
What is Ethernet? ,[object Object],[object Object],[object Object],[object Object],Preamble (8 bytes) Destination Address (6 bytes) Source Address (6 bytes) Type/ Length (2 bytes) Data (46 to 1500 bytes) Frame Check Sequence (4 bytes)
Traffic and  Addressing
MAC Address ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Traffic and Addressing ,[object Object],??????????????
MAC-Addressing - Unicast ,[object Object],[object Object],00 : 80 : 63 : 0E : 1D : 5C 00 : 80 : 63 Manufacturer 0E : 1D : 5C Device Smith Family Name John Given Name
MAC-Addressing - Unicast ,[object Object],A B C Uni to A Uni to A
MAC-Addressing - Unicast ,[object Object],A B C Uni to C Uni to C
MAC-Addressing - Broadcast FF : FF : FF : FF : FF : FF ,[object Object],[object Object]
MAC-Addressing - Broadcast ,[object Object],Broadcast Broadcast Broadcast Broadcast
Broadcast Example ,[object Object]
MAC-Addressing - Multicast 01 : 00 : 5E : xx : xx : xx ,[object Object],[object Object],01 : 00 : 5E Multicast xx : xx : xx Group
MAC-Addressing - Multicast ,[object Object],Multicast Multicast Multicast
Multicast Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Layer 2 - Frame ,[object Object],[object Object],00:1c:23:af:6e:4f 00:1d:09:c5:ba:86 01:00:5e:40:10:01 FF:FF:FF:FF:FF Preamble (8 bytes) Destination Address (6 bytes) Source Address (6 bytes) Type/ Length (2 bytes) Data (46 to 1500 bytes) Frame Check Sequence (4 bytes) 1) Physical 2) Data Link
Switches
Switches ,[object Object]
Switches ,[object Object],[object Object]
Switches ,[object Object],[object Object]
Unicast Traffic Transmission ,[object Object],P1 P4 P3 P2 P5 PLC A PLC C PLC B RC 13 RC 12 RC 11 PC 1 To PLC C From  PC 1 To PLC C From  PC 1
Unicast Traffic Transmission PLC A 00:50:d2:0e:1d:ce PLC C 00:13:3f:19:b0:a3 PLC B 00:40:d1:be:2d:3e RC 13 -16:2e:f4 RC 12 -2a:0e:6f RC 11 -14:1d:c5 P1 P4 P3 P2 P5 PC 1 00:80:63:0e:1d:5c ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Unicast Traffic Transmission P1 P4 P3 P2 P5 ,[object Object],[object Object],[object Object],[object Object],[object Object],PLC A 00:50:d2:0e:1d:ce PLC C 00:13:3f:19:b0:a3 PLC B 00:40:d1:be:2d:3e RC 13 -16:2e:f4 RC 12 -2a:0e:6f RC 11 -14:1d:c5 PC 1 00:80:63:0e:1d:5c ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],To PLC C From  PC 1 To PLC C From  PC 1
OSI Reference Model Layer 2 communication... 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical
Layer 3 Technology
OSI Reference Model 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical IP Internet Protocol
Traffic and  Addressing
Traffic Types ,[object Object],??????????????
IP Addressing - Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],10111110  . 10101000  . 00001010  . 10001100 BYTE 1 BYTE 2 BYTE 3 BYTE 4 32 BITs
IP Addressing - Overview ,[object Object],[object Object],[object Object],190 . 168 . 10 . 46 190 . 168 Network 10 . 46 Node Elm Street 1665 House Number
IP Addressing - Overview ,[object Object],[object Object],190 . 168 . 10 . 46 ,[object Object],190 . 168 Network 10 . 46 Node
IP Addressing – Subnet Mask ,[object Object],[object Object],[object Object],IP Address – 190 . 168 . 10 . 46 Subnet Mask – 255 . 255 . 0 . 0
IP Addressing - Classes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Used for multicast applications only For experimental purposes Used for network Host/Node addressing
IP Addressing – Subnet Mask ,[object Object],[object Object],[object Object],[object Object],11111111 .00000000.00000000.00000000 11111111.11111111 .00000000.00000000 11111111.11111111.11111111 .00000000
IP Addressing – Subnet Mask ,[object Object],[object Object],[object Object],[object Object],[object Object],Network Portion **What else does this tell me??? ,[object Object],[object Object]
IP Addressing – Class B Network ID ,[object Object],[object Object],[object Object],[object Object],[object Object],Why do subtract 2? ,[object Object],[object Object],[object Object]
IP Addressing – Class B Broadcast ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IP Addressing – Unicast ,[object Object],[object Object],Ex. 190 . 168 . 10 . 46
MAC-Addressing - Unicast ,[object Object],A B C Uni to A Uni to A
MAC-Addressing - Unicast ,[object Object],A B C Uni to C Uni to C
IP Addressing – Broadcast Ex. 190 . 168 . 255 . 255 ,[object Object],[object Object],BROADCAST!!!
IP Addressing – Broadcast ,[object Object],Broadcast
IP Addressing – Multicast Ex. 239 . 129 . 1 . 66 ,[object Object],[object Object]
IP Addressing – Multicast ,[object Object],Multicast Multicast Multicast
Layer 3 - Packet ,[object Object],[object Object],190.168.10.46 190.168.10.50 239.129.1.66 190.168.255.255 Preamble (8 bytes) Destination Address (6 bytes) Source Address (6 bytes) Type/ Length (2 bytes) Data (46 to 1500 bytes) Frame Check Sequence (4 bytes) 1) Physical 2) Data Link IP Header IP  Source Address IP  Destination Address Data 3) Network
Mac/IP Relationship ,[object Object],[object Object],[object Object],[object Object],Street  Elm  ,[object Object],[object Object],[object Object],[object Object],= ,[object Object],[object Object],= ,[object Object],[object Object],= ,[object Object],[object Object],=
Routers
Routers ,[object Object]
Routers ,[object Object],[object Object]
Routers ,[object Object],[object Object],LAN A LAN B LAN C LAN D
Routers ,[object Object],Router
Routers ,[object Object],Router 192.168.1.7/24 192.168.1.10/24 10.24.228.109 1 10.24.228.109
Routers ,[object Object],Router 192.168.1.7/24 192.168.1.10/24 10.24.228.109 1
Routers
Routers ,[object Object],Router 192.168.1.7/24 192.168.1.7/24 10.24.228.109 10.24.228.109 192.168.1.1/24 ,[object Object]
OSI Reference Model Layer 3 communication... 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object]
Questions?

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IaC & GitOps in a Nutshell - a FridayInANuthshell Episode.pdf
 

Intro to Ethernet

  • 1. 2010 Mission Critical Network Design Seminar TP01:Introduction to Ethernet Networking
  • 4. What is the OSI Model?
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  • 6. OSI Reference Model… 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical Frames Packets Segments Data Data Data Bits
  • 7. OSI Reference Model… 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical Ethernet IP Internet Protocol TCP Port 80 HTTP Web Application CAT 5 Cable Ethernet IP Internet Protocol UDP Port 161/162 SNMP Network Mgmt CAT 5 Cable
  • 8. OSI Reference Model… 1) Physical 1) Physical 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application
  • 9. OSI Reference Model… 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical Ethernet
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  • 15. Traffic and Addressing
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  • 35. OSI Reference Model Layer 2 communication... 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical
  • 37. OSI Reference Model 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical IP Internet Protocol
  • 38. Traffic and Addressing
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  • 67. OSI Reference Model Layer 3 communication... 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical 2) Data Link 3) Network 4) Transport 5) Session 6) Presentation 7) Application 1) Physical
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Editor's Notes

  1. The OSI model is a 7 layer model. The OSI model is virtual and used as a guide for networking technology and communication.
  2. Moving forward, we will be focusing primarily on Layer 2 (Ethernet) and how communications at this level work!
  3. The MAC address (Media Access Control) is the hardware address of network devices (especially network cards) used for unique device identification in the network. The MAC address comprises 48 bits / 6 bytes, and is usually written in hexadecimal format. The Least Significant Bit (LSB) of the first byte indicates whether the address is an individual address ("0"), e.g. the address of a network card, or a multicast address ("1"). Manufacturers of network components can purchase address ranges from the IEEE. The first three bytes of the network address serve as the manufacturer's identifier (also termed OUI - O rganization U nique I dentifier). This must comprise global and individual addresses. The remaining three bytes are assigned individually by the manufacturer for each interface. The MAC address in which all 48 bits are set to 1 is used as a broadcast address sent to all the devices in a LAN.
  4. Just like with Layer 2, Layer 3 addresses have a direct correlation to the type of traffic being transmitted! There are however differences between a Layer 2 and Layer 3 Unicast, Multicast and Broadcast addresses.
  5. Each 8 BIT binary representation of the IP address is defined as an Octet!
  6. The Subnet Mask for each range of addresses help define which portion of the 32 bit address is the Network ID and which portion represents the specific device in that Network!
  7. The traditional method of using Class A, B or C contain both the Unicast and Broadcast elements while Class D addresses represent the Multicast Element.
  8. From this calculation, we are also able to identify the Broadcast ID of a particular network segment!