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IPv6 anycast Technology and Its anycast Address Resolution Protocol
Author: Wang Jianli fangwei
Abstract: anycast is a new network application. Anycast communication supports service routing. However, many definitions of anycast communication in IPv6 are vague, and no protocol standards have been reached in controlling routes, therefore, anycast communication between nodes cannot be implemented. In this article, we will first describe the anycast Communication Based on IPv6 and many potentia
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an Ethernet broadcast data packet. Keywords
EtherIs optional.
IP Broadcast
True when the data packet is an IP broadcast data packet. It checks all broadcasts, including the addresses 0 and 1, and then checks the subnet mask.
Ether Multicast
True when the data packet is an Ethernet multicast data packet. The keyword ether is optional. Below is a common phrase'
Ether [0] 1! = 0'
IP Multicast
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frame is discarded when the target station receives a data frame with an error and does nothing else. the correction of errors is determined by the top management. if some data is lost and retransmitted at the higher level, Ethernet does not know that this is a re-transmitted frame, but is sent as a new data frame. MAC frame format: value of the MAC frame type Field and Its Meaning: 0x0000-0x05DC IEEE 802.3 Length0x0101-0x01FF Experiment0x0600 XEROX NS IDPZero x 06600x0661 DLOG0x0800 Internet P
(the core layer of the network interface) when sending data packets. What functions does this transfer take place? The Network Interface core layer uses dev_queue_xmit () (net/core/dev. c, line975) This function provides a unified sending interface to the upper layer. That is to say, whether it is an IP address or ARP protocol, this function transmits the data to this layer, you can call this function when you want to send data. Dev_queue_xmit () is executed in dev-> hard_start_xmit (), while d
In the Ebtables parameter:-P: Specify the type of protocol used, IPV4,ARP, etc. optional (required when using) for details see /etc/ethertypes--IP-PROTO:IP packet type, 1 ICMP packet, 6 TCP packet, 17 UDP packet, detailed description under /etc/protocols[email protected]:/etc# Cat Ethertypes## Ethernet Frame Types# This file describes some of the various Ethernet# protocol types that is used on Ethernet networks.## This list could is found on:# http://www.iana.org/assignments/ethernet-numbers##
to this layer, you can call this function when you want to send data. Dev_queue_xmit () is executed in dev-> hard_start_xmit (), while dev-> hard_start_xmit () calls the actual driver to complete the task of sending. For example, in the above example, calling dev-> hard_start_xmit () actually calls el_start_xmit ().
Now we will discuss the receipt situation. The core layer of the network interface receives data sent from the upper layer through the function netif_rx () (net/core/dev. c 1214)
retransmitted at the higher level, Ethernet does not know that this is a re-transmitted frame, but is sent as a new data frame.
MAC frame
MAC frame format:
Value of the MAC frame type Field and Its Meaning:
0x0000-0x05dc IEEE 802.3 Length
0x0101-0x01ff Experiment
0x0600 Xerox NS IDP
Zero X 0660
0x0661 dlog
0x0800 Internet Protocol (IP)
0x0801 x.75 Internet
0x0802 NBS Internet
0x0803 ECMA Internet
0x0804 chaosnet
0x0805 X.25 level 3
0x0806 Address Resolution Protocol (ARP: Address
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, the Exchange opportunity sends an ARP request to the port that has the MAC address we want to query
If the router is also "connected" in it, it returns aARP Reply
ARP Reply:Sender MAC:target:mac:address:hereSender IP:target.ip.goes.hereTarget MAC:interface:mac:address:hereTarget IP: Interface.ip.goes.hereNow that we have the DNS server or the IP address of the default gateway, we can continue with the DNS request:
A UDP request pac
well-known protocol. The following table lists the common values in the ethertype field and their corresponding protocols:Ethertype(Hexadecimal)Protocol0x0000-0x05dc IEEE 802.3 Length0x0101-0x01ff Experiment0x0600 Xerox NS IDPZero X 06600x0661 dlog0x0800 Internet Protocol (IP)0x0801 x.75 Internet0x0802 NBS Internet0x0803 ECMA Internet0x0804 chaosnet0x0805 X.25 level 30x0806 Address Resolution Protocol (ARP: Address Resolution Protocol)0x0808 Frame Relay ARP (Frame Relay ARP) [rfc1701]0x6559 raw
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