Understanding LLDP Frames and Network Communication
Explore the detailed breakdown of LLDP frames, SDN switches, controllers, and legacy network infrastructure for efficient network communication. Learn about the data exchange process and essential components involved in network communication.
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Presentation Transcript
Streaming Server Legacy Switch Port 24 Port 5 SDN Controller (RYU controller ) SDN Switch 1 Port 2 Port 1 Port 24 Port 2 SDN Switch 3 Port 5 Port 24 Port 1 Port 1 Port 2 SDN Switch 2 PC Mac address 00:e0:4c:68:03:81 controller 00:1a:eb:92:6a:ab Switch 1 SDN switch Control plane Data plane 00:1a:eb:92:6a:bc Switch 2 Switch 3 controller 00:1a:eb:92:6a:6e
LLDP Frame Chassis ID switch ID Port ID LLDP PDU output port Time To Live 0 drop
Controller -> legacy switch MAC frame payload DA(6 bytes) SA(6 bytes) Ether type(2 bytes) FF:FF:FF:FF:FF:FF 0x88cc controller mac address (RYU:00:e0:4c:68:03:81) Legacy switch controller LLDP byte legacy switch
Legacy switch -> first SDN switch DA SA Ether type data FF:FF:FF:FF:FF:FF LLDP frame 0x88cc 15 0 31 Legacy switch MAC address Destination address FF:FF:FF:FF:FF:FF Source address (Legacy switch MAC address) SDN switch output ports Switch ID Chassis ID PDU TLV port ID Port ID PDU TLV EtherType = 0x88cc Data = LLDP PDU FCS
7 bits 9 bits Length=0 Type = 0 First SDN switch -> second SDN switch 0000000 000000000 DA SA Ether type Port ID TLV TTL TLV End TLV Chassis ID TLV FF:FF:FF:FF:FF:FF 0x88cc 16 bits 7 bits 9 bits Type = 3 Length=2 TTL=2 First SDN switch MAC address 0000011 000000010 0000000000000010 9 bits 8 bits 7 bits 8 bits 8 bits 7 bits 9 bits 8 bits Length=2 Port-ID=1 Type = 2 Subtype=2 Subtype=7 Length=2 Chassis-ID=2 Type =1 First SDN switch port ID Port component First SDN switch Chassis ID Locally assigned 00000001 00000111 00000010 0000001 000000010 0000010 000000010 00000010 chassis ID port ID subtype
Second SDN switch -> controller (1/2) DA SA Ether type TTL TLV Port ID TLV End TLV Port ID TLV TTL TLV Chassis ID TLV Chassis ID TLV FF:FF:FF:FF:FF:FF 0x88cc 16 bits 7 bits 9 bits Type = 3 Length=2 TTL=1 Legacy switch MAC address 0000011 000000010 0000000000000001 9 bits 8 bits 7 bits 8 bits 8 bits 7 bits 9 bits 8 bits Length=2 Port-ID=1 Type = 2 Subtype=2 Subtype=7 Length=2 Chassis-ID=2 Type =1 First SDN switch port ID Port component First SDN switch Chassis ID Locally assigned 00000001 00000111 00000010 0000001 000000010 0000010 000000010 00000010
7 bits 9 bits Type = 0 Length=0 Second SDN switch -> controller (2/2) 0000000 000000000 DA SA Ether type Port ID TLV End TLV Port ID TLV TTL TLV Chassis ID TLV Chassis ID TLV TTL TLV FF:FF:FF:FF:FF:FF 0x88cc First SDN switch MAC address 16 bits 7 bits 9 bits Type = 3 Length=2 TTL=1 8 bits 7 bits 9 bits 8 bits 0000011 000000010 0000000000000001 Subtype=7 Length=2 Chassis-ID=3 Type =1 9 bits 8 bits 7 bits 8 bits Length=2 Port-ID=24 Second SDN switch Chassis ID Type = 2 Subtype=2 Locally assigned 00000111 0000001 000000010 00000011 Second SDN switch port ID Port component 00011000 00000010 0000010 000000010
Streaming Server Legacy Switch Port 5 Port 24 SDN Controller ( RYU controller ) SDN Switch 1 Port 2 Port 24 Port 1 Port 2 SDN Switch 3 Port 24 Port 1 Port 5 Port 1 Port 2 SDN Switch 2 PC Controller port LLDP
Psuedo Code: ==========================comparing================================================= switch LLDP chassis id LLDP chassis id LLDP chassis id port id switch
