精华内容
下载资源
问答
  • Link local address

    2011-07-02 17:30:20
    Link local address协议,是zeroconfig协议的组成之一
  • IPv6 link-local 地址的功能和原理

    千次阅读 2020-07-23 09:48:45
    注意:在本链路上,路由表中看到的下一跳都是对端的Link Local地址,不是公网IP地址 前缀:FE80::/10 范围:只能在本地链路使用,不能在子网间路由 为何需要link-local? –在一个接口可以配置很多IPv6地址,所以学习...

    https://blog.51cto.com/361531/630193

    当在一个节点启用IPV6,启动时节点的每个接口自动生成一个link-local address

    其前缀64位为标准指定的,其后64位按EUI-64格式来构造

    注意:在本链路上,路由表中看到的下一跳都是对端的Link Local地址,不是公网IP地址

    前缀:FE80::/10

    范围:只能在本地链路使用,不能在子网间路由

    为何需要link-local?

    –在一个接口可以配置很多IPv6地址,所以学习路由就有可能出现很多下一跳。

    所以出现Link Local地址唯一标识一个节点。在本地链路看到下一跳都是对端的Link Local地址。

    在网络重新编址过程中,节点和路由器的Link Local地址不会发生变化,可以很容易地做一个修改,不用担心网络不可达。

    展开全文
  • IPv6的链路本地(link-local)地址和...IPv6大概可以分为四类链路本地Link-Local地址站点本地Site-Local地址 IPv6大概可以分为四类 1)单播地址(unicast address) 2)组播地址(Multicast Address) IPv6

    IPv6的链路本地(link-local)地址和站点本地(site-local)地址


    IPv6大概可以分为四类

    1)单播地址(unicast address)

    2)组播地址(Multicast Address)

    IPv6             IPv4            说明

    ~ FF01::1    224.0.0.1    所有-节点地址

    ~ FF01::2    224.0.0.2    所有-路由器地址

    ~ FF02::1    224.0.0.1    所有节点地址

    ~ FF02::2    224.0.0.2    所有路由器地址

    ~ FF02::5    224.0.0.5    OSPF路由器

    ~ FF02::6    224.0.0.6    OSPFIGP路由器

    ~ FF02::9    224.0.0.9    RIP路由器

    ~ FF02::D    224.0.0.13    所有PIM路由器

    ~ FF05::2    224.0.0.2    所有路由器地址

    ~ FF0X::101  224.0.1.1    网络时间协议NTP

    3)任播地址(anycast address)

    4)特殊地址
    ~ 环回地址   ::1/128
    ~ 组播地址    FF00::/8
    ~ 链路本地地址    FF80::/10
    ~ 站点本地地址    FEC0::/10
    ~ 未指定的地址   ::0/128
    ~ 全局单播    其他地址


    1. 链路本地(Link-Local)地址

    * 特点
    ~ 用在单一链路上
    ~ 带有链路-本地源或目的地址的数据包不转发到其它链路
    ~ 如:FE80::20C:76FF:FE0A:9A7C

    * 应用范围:只能在同一个本地链路节点之间使用 FE80::/64

    * 节点启用时,会自动配置一个本地链路地址
    ~ 前64位:FE80:0:0:0
    ~ 后64位:EUI-64地址(vista和win7已不采用EUI-64了)

    2. 站点本地(Site-Local)地址

    * 应用范围:站点内,与IPv4的私人地址类似,本地站点地址被设计用于永远不会与全球IPV6因特网进行通信的设备,比如:打印机、内部网服务器、网络交换机等

    * 前缀:FEC0::/10 其后的54比特用于子网ID,最后64位用于主机ID

    * 例如:在本地分配十个子网
    1)、FEC0:0:0:0001::/64
    2)、FEC0:0:0:0002::/64
    3)、FEC0:0:0:0003::/64
    10)、FEC0:0:0:000A::/64

    参考网址:http://www.netexpert.cn/forum.php?mod=viewthread&tid=18605
                    http://blog.163.com/s_u/blog/static/13308367201052411431027/

    展开全文
  • 根据MAC地址,生成link-local ipv6地址

    千次阅读 2011-01-12 14:18:00
    link-local地址:10(1111 1110 10)+54(全0)+64(接口标识interface id) interface id: 將十六進位值FF-FE 插入以太网 MAC 位址的中间,也就是第三位元組與第四位元組中間。将原来以太网MAC...

    link-local地址:10(1111 1110 10)+54(全0)+64(接口标识interface id)
    interface id:
    將十六進位值FF-FE 插入以太网 MAC 位址的中间,也就是第三位元組與第四位元組中間。将原来以太网MAC地址的第一个byte的倒数第二位取反,假如原来是1取反得0,0取1.

    举例:
    本机MAC地址:00-18-F3-3E-89-EA
    插入:FF-FE,得00-18-F3-FF-FE-3E-89-EA
    取反:02-18-F3-FF-FE-3E-89-EA
    结果为:FE80::0218:F3FF:FE3E:89EA (::表示中间全为零)

    展开全文
  • Link-local address

    千次阅读 2019-01-08 05:46:43
    A link-local address is an Internet Protocol address that is intended only for communications within the segment of a local network (a link) or a point-to-point connection that a host is connected to....

    A link-local address is an Internet Protocol address that is intended only for communications within the segment of a local network (a link) or a point-to-point connection that a host is connected to. Routers do not forward packets with link-local addresses.

    Link-local addresses may be assigned manually by an administrator or by operating system procedures. Most often they are assigned using stateless address autoconfiguration. In IPv4,[1] they are normally only used to assign IP addresses to network interfaces when no external, stateful mechanism of address configuration exists, such as the Dynamic Host Configuration Protocol (DHCP) or when another primary configuration method has failed. In IPv6,[2] link-local addresses are mandatory and required for the internal functioning of various protocol components.

    Link-local addresses for IPv4 are defined in the address block 169.254.0.0/16, in CIDR notation. In IPv6, they are assigned with the fe80::/64 prefix.

    IPv4[edit source | edit]

    In RFC 3927, the Internet Engineering Task Force has reserved the address block 169.254.1.0 through 169.254.254.255[note 1] for link-local addressing in Internet Protocol Version 4. Link-local addresses are assigned to interfaces by host-internal, i.e. stateless, address autoconfiguration when other means of address assignment are not available.[1]

    RFC 3927 warns against the simultaneous use of addresses of different scope,[3] such as configuring link-local addresses as well as globally routable addresses on the same host. Therefore, hosts search for a DHCP server on the network before assigning link-local addresses.

    In the automatic address configuration process, network hosts select a random candidate address within the reserved range and use Address Resolution Protocol (ARP) probes to ascertain that the address is not in use on the network. If a reply is received to the ARP, it indicates the candidate IP address is already in use; a new random candidate IP address is then created and the process repeated. The process ends when there is no reply to the ARP, indicating the candidate IP address is available.

    When a globally routable or a private address becomes available after a link-local address has been assigned, the use of the new address should generally be preferred to the link-local address for new connections but communication via the link-local address is still possible.[4]

    Microsoft refers to this address autoconfiguration method as Automatic Private IP Addressing (APIPA).[5] It is sometimes also casually referred to as auto-IP.

    IPv6[edit source | edit]

    In the Internet Protocol Version 6 (IPv6), the address block fe80::/10 has been reserved for link-local unicast addressing.[2] The actual link local addresses are assigned with the prefix fe80::/64.[6][note 2] They may be assigned by automatic (stateless) or stateful (e.g. manual) mechanisms.

    Unlike IPv4, IPv6 requires a link-local address to be assigned to every network interface on which the IPv6 protocol is enabled, even when one or more routable addresses are also assigned.[7] Consequently, IPv6 hosts usually have more than one IPv6 address assigned to each of their IPv6-enabled network interfaces. The link-local address is required for IPv6 sublayer operations of the Neighbor Discovery Protocol, as well as for some other IPv6-based protocols, like DHCPv6.

    In IPv6, stateless address autoconfiguration is performed as a component of the Neighbor Discovery Protocol (NDP),[8] as specified in RFC 4862. The address is formed from its routing prefix and the MAC address of the interface.

    IPv6 introduced additional means of assigning addresses to host interfaces. Through NDP routing prefix advertisements, a router or a dedicated server host may announce configuration information to all link-attached interfaces which causes additional IP address assignment on the receiving interfaces for local or global routing purposes. This process is sometimes also considered stateless, as the prefix server does not receive or log any individual assignments to hosts. Uniqueness is guaranteed automatically by the address selection methodology (MAC-address based according to RFC 4862, and/or randomized according to RFC 4941) in combination with the duplicate address detection algorithm.

    展开全文
  • IPv6 link-local和site-local address

    千次阅读 2015-02-27 11:20:10
    学习IPV6的时候涉及到一个概念,link-local address, 中文叫“链路本地地址”,它的前缀是 FE80::/64 一个link-local address的范例: FE80::713e:a426:d167:37ab 实际上,这个概念类似于ipv4中,当DHCP分配...
  • 学习IPV6的时候涉及到一个概念,link-local address, 中文叫“链路本地地址”,它的...实际上,这个概念类似于ipv4中,当DHCP分配失败时自动生成的169.254.XXX.XXX这样的地址,凡是源地址或目的地址中含有link-local
  • 关于link-local和site-local address的问题  ...学习IPV6的时候涉及到一个概念,link-local address, 中文叫“链路本地地址”,它的前缀是 FE80::/64 一个link-local address的范例: FE80::
  • 169.254.0.0/16 地址的原理及用途

    万次阅读 2019-02-12 10:30:35
    产品上要支持LLA,即link-local 地址,Link Local地址也被称为:链路本地地址(link local address),是设备在本地网络中通讯时用的地址,网段为169.254.0.1~169.254.254.255  当DHCP服务器故障,或者DHCP超时,...
  • Link-local Multicast Name Resolution

    千次阅读 2013-11-02 19:13:05
    LLMNR 是一种在子网域提供域名解析的方案。利用多播的方式,使得子网内的节点可以将主机名解析成IP地址。 使用的多播地址为224.0.0.252。 详见RFC4795。
  • IPv6 local site 地址详解

    2017-11-12 20:19:00
    Technorati 标签:IPv6 local site,local-site address,IPv6 loca-site local site address: 一种受限制的单波地址,不能像...关于Local site address与RFC 1918私有的因特网地址分配所定义的IPv4私有地址空间类似...
  • route -n 时你总能看到这样一条路由 Destination Gateway Genmask Flags Metric Ref Use Iface 169.254.0.0 0.0.0.0 255.255....由RFC3330 可知 169.254.0.0/16 为本地链路地址 “169.254.0.0/16 – This is the “l...
  • 全球IP不够分,IPv6逐步上线了。 IPv6好处就不用多说了,比如支持IP安全,比如用不完...华为VRP系统中,在指定接口配置静态路由的时候就必须使用接口的link-local address地址,而不能使用配置的ip地址。 原因是ipv6
  • 正確的 IPv6 link-local address 計算方法

    千次阅读 2011-04-12 15:42:00
    http://oa.jmu.edu.cn/netoa/libq/IPv6disc.nsf/aac7d56ca8fd884b852563be00610639/de20407eca227d4348256e7e001f0e26?OpenDocument<br />  每個執行 IPv6 的介面都會有一個位址稱為 link-local 位址,...
  • 一般情况下,在对应的网卡启动的时候,如果支持IPV6,且软件的IPV6功能使能,就会自动配置一个Link local地址,这个link local地址就是以fe80开头,同时有了link local地址之后,系统就会发送一个RS的packet到网络中
  • IPV6 路由协议配置

    千次阅读 2020-08-10 13:24:55
    一、静态路由 1.1配置格式;...如果选择Link Local地址,必须跟出口,因为路由表中无法查询到FE80路由 Note: 如果没有开启ipv6 unicast-routing(单播路由功能),只能去往邻居路由器直连接口 也就是说没有路由
  • 深入理解docker的link机制

    千次阅读 2017-12-13 16:27:45
    原文地址:https://yq.aliyun.com/articles/55912摘要: 什么是docker的link机制 同一个宿主机上的多个docker容器之间如果想进行通信,可以通过使用容器的ip地址来通信,也可以通过宿主机的ip加上容器暴露出的端口...
  • 由于IPv6的 Router Advertisement 无状态自动配置 stateless在目前的标准下[1]只能告知客户端此网段的ipv6 prefix和default gateway(网关的linklocal地址),因此,如果要实现更加详细的资讯配置,只能使用RADVD+...
  • GCC __attribute__ 和 link 脚本控制 section 基地址 网上看的一篇文章,感谢作者,另外加上自己的一点注释。 ... ... ... ... .... .... ..... 利用 GCC 的 __attribute__ 属性的 section 选项来控制数据区的...
  • local dns

    千次阅读 2017-11-12 02:51:00
    local dns (local name server)是客户端网络设置的一部分,要么是手工配置,要么从DHCP得到。一般local dns 在从网络上靠近客户端。 主要的域,比如.com .net .org 等,都由Internet管理方进行管理维护,负责这些...
  • Linux下ping6命令ping本地ipv6地址(local ipv6 address)出现无效的参数(Invalid argument)时,需加-I参数指定网络界面。
  • IP: 169.254.0.0/16 地址用途

    万次阅读 2018-08-13 11:32:10
    1. 一直困惑169.254.0.0/16是干嘛的,每次笔记本dhcp获取地址失败后,就会随机在这个B类地址段获取一个地址;在rfc5735里面有对所有...link local" block. As described in [RFC3927], it is allocated for...
  • IPv6本地链路地址生成方式

    万次阅读 2018-10-15 11:34:19
    IPv6中定义的一种地址类别为本地链路地址Link-Local Addresses,协议中规定,每个IPv6接口必须要有本地链路地址,使用FE80::/10地址块,相同于IPv4中的169.254.0.0/16网段,尽在本地链路有效。Linux内核中定义了4中...
  • 组播地址分类 Cyrus

    千次阅读 2020-04-24 08:30:37
    一、组播地址分类 Multicast地址:224.0.0.0-239.255.255.255第一...预留的局部链路地址(reserved link local address): 保留给本地网段上的网络协议使用。路由器不转发目标地址为这段地址的数据包(FR Hub&...
  • 看一下你的服务器配置的地方是哪: .../sbin:/bin:/usr/sbin:/usr/bin # 表示各个地址 以 :隔开 。其中并没有 /usr/local/bin 应该正确的操作: [root@iZ2ze8et25bocj46b5vnegZ soft...

空空如也

空空如也

1 2 3 4 5 ... 20
收藏数 89,280
精华内容 35,712
关键字:

linklocal地址