no ip igmp snooping

This time, we will summarize the UDP and IGMP in the IP layer. UDP is a simple datagram-oriented transport layer protocol that provides unreliable services: It adds the application data to the UDP header and then sends it to the IP layer, but they cannot be guaranteed to reach their destination. The application must be concerned with the length of the

field is MF (more Fragment) Mf=1 indicates "There are shards" later. Mf=0 represents the Last Shard Df The one in the middle of the Flag field is DF (Don ' t Fragment) Shards are allowed only when df=0 Chip Offset:Occupies 12 bits, which refers to the relative position of a piece in the original group after the Shard. Slice offset in 8-byte offset unitsSurvival time:The maximum number of routers that are recorded as TTL (Time to Live) datagrams in th

Internet Group Management Protocol (IGMP), which allows all systems on a physical network to know the multicast group in which the host is currently located. Multicast routers need this information to know which ports multicast data packets should be forwarded. IGMP is defined in RFC 1112. IGMP has a fixed message length and no data is available. The protocol f

Catalogue IP protocol Header formatAddress Resolution Protocol ARPReverse Address Resolution Protocol RARPInter-network Control Message Protocol ICMPInternet Group Management Protocol IGMP IP datagram header IP Datagram Header format: The highest bit is on the left and is recorded as 0 bit; the lowest bit is on the r

IP protocol Header formatAddress Resolution Protocol ARPReverse Address Resolution Protocol RARPInter-network Control Message Protocol ICMPInternet Group Management Protocol IGMP IP Datagram HeaderIP Datagram Header format:The highest bit is on the left and is recorded as 0 bit; the lowest bit is on the right.Version:4 bits, refers to the

addresses, for example, Ping 224.0.0.2.Reply from 192.168.11.1: bytes = 32 time Reply from 192.168.11.1: bytes = 32 time Reply from 192.168.11.1: bytes = 32 time Reply from 192.168.11.1: bytes = 32 time Reply from 192.168.11.1: bytes = 32 time Reply from 192.168.11.1: bytes = 32 time Reply from 192.168.11.1: bytes = 32 time We can see that this ping only returns a response from one IP address. This is the address of my gateway, which also verifies th

address as a multicast address, and the device driver of the source host converts it to the appropriate MAC address and sends it. The process at the receiving end needs to tell its IP layer that it wants to accept data from a multicast address, and the corresponding device driver sets up a data frame that can accept the corresponding MAC address. This completes the setup of both sides of the communication, and this process is called "joining a multic

IP/IGMP/UDP checksum algorithm and algorithm: the IP, IGMP, UDP, and TCP packet headers both have validation fields, and their algorithms are the same. The range of IP, IGMP, UDP, and TCP checksum: only the length of the packet he