Understanding SDN Switch Code Tracing Process
This content delves into the intricate process of tracing code within SDN switches. It covers topics such as the first packet handling, LLDP communication, flow table operations, and controller interactions. Through detailed images and descriptions, readers gain insight into the functionalities and protocols involved in SDN switch operations.
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Presentation Transcript
Outline First packet of SDN switch Packet in Packet out Switch LLDP
SDN controller packet switch Switch controller(packet in) Controller flow-mod switch(packet out) flow table ASIC switch packet flow table / EstiNet
Outline First packet of SDN switch Packet in Packet out Switch LLDP
First packet of SDN switch The required fields don t need to be implemented in all flow tables, and don t need to be implemented in the same flow table.
OFPXMT_OFB_IN_PORT OFPXMT_OFB_IN_PHY_PORT OFPXMT_OFB_VLAN_VID OFPXMT_OFB_VLAN_PCP OFPXMT_OFB_ETH_TYPE OFPXMT_OFB_IP_DSCP OFPXMT_OFB_IP_ECN OFPXMT_OFB_IP_PROTO OFPXMT_OFB_IPV4_SRC OFPXMT_OFB_IPV4_DST OFPXMT_OFB_TCP_SRC OFPXMT_OFB_TCP_DST OFPXMT_OFB_UDP_SRC OFPXMT_OFB_UDP_DST OFPXMT_OFB_SCTP_SRC OFPXMT_OFB_SCTP_DST OFPXMT_OFB_ICMPV4_TYPE OFPXMT_OFB_ICMPV4_CODE OFPXMT_OFB_ARP_OP OFPXMT_OFB_ARP_SPA OFPXMT_OFB_ARP_TPA OFPXMT_OFB_ARP_SHA OFPXMT_OFB_ARP_THA OFPXMT_OFB_IPV6_SRC OFPXMT_OFB_IPV6_DST OFPXMT_OFB_ICMPV6_TYPE OFPXMT_OFB_ICMPV6_CODE OFPXMT_OFB_MPLS_LABEL OFPXMT_OFB_MPLS_TC OFPXMT_OFB_MPLS_BOS
Outline First packet of SDN switch Packet in Packet out Switch LLDP
Packet in Packet in flow table entry(OFPR_NO_MATCH = 0) controller(OFPR_ACTION = 1) Packet TTL(OFPR_INVALID_TTL = 2)
Outline First packet of SDN switch Packet in Packet out Switch LLDP
Packet out controller data OpenFlow switch
Connect controller packet out agent_recv_packet_out agent_send_packet_out