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&/usr/share/doc/initscripts-9.03.40/sysconfig.txt/etc/sysconfig/network-scripts/ifcfg-&interface-name&:&alias-name&:& The first defines an interface, and the second contains& only the parts of the definition that are different in a& "alias" (or alternative) interface.& For example, the& network numbers might be different, but everything else& might be the same, so only the network numbers would be& in the alias file, but all the device information would& be in the base ifcfg file.& The items that can be defined in an ifcfg file depend on the& interface type.& The really obvious ones I'm not going to& you can figure out what "IPADDR" is, I& think...& :-)& Base items:&&& NAME=&friendly name for users to see&&&&&& Most important for PPP.& Only used in front ends.&&& DEVICE=&name of physical device (except dynamically-allocated PPP&&&&& devices where it is the "logical name")&&&& IPADDRn=&&& PREFIXn=&&&&& Network prefix.& It is used for all configurations except aliases&&&&& and ippp devices.& It takes precedence over NETMASK when both&&&&& PREFIX and NETMASK are set.&&& NETMASKn=&&&&& S just useful for aliases and ippp devices.& For all other&&&&& configurations, use PREFIX instead.&&& The "n" is expected to be consecutive positive integers starting from 0.&&& It can be omitted if there is only one address being configured.&&& GATEWAY=&&& METRIC=&&&&& Metric for the default route using GATEWAY&&& ONBOOT=yes|no (not val use ONPARENT)&&& HOTPLUG=yes|no&&& USERCTL=yes|no&&& BOOTPROTO=none|bootp|dhcp&&& VLAN=yes|no&&& MTU=&&&&& Default MTU for this device&&& WINDOW=&&&&& Default window for routes from this device&&& PEERDNS=yes|no&&&&& modify /etc/resolv.conf if peer uses msdns extension (PPP only) or&&&&& DNS{1,2} are set, or if using dhclient. default to "yes".&&& DNS{1,2}=&ip address&&&&&& provide DNS addresses that are dropped into the resolv.conf&&&&& file if PEERDNS is not set to "no".&&& SCOPE=&&&&& Set to "scope SCOPE-ID" to set a non-default scope.& Supported only on&&&&& Ethernet with BOOTPROTO=none.&&& SRCADDR=&&&&& use the specified source address for outgoing packets&&& HWADDR=&&&&& ethernet hardware address for this device&&& MACADDR=&&&&& Set the hardware address for this device to this.&&&&& Use of this in conjunction with HWADDR= may cause&&&&& unintended behavior.&&& NOZEROCONF=&&&&& Set this to not set a route for dynamic link-local addresses&&&&& over this device.&&& PERSISTENT_DHCLIENT=yes|no|1|0&&&&& Without this option, or if it is 'no'/'0', and BOOTPROTO=dhcp,&&&&& dhclient is run for the interface in "one-shot" if the&&&&& dhcp server does not respond for a configurable timeout, then&&&&& dhclient exits and the interface is not brought up -&&&&& the '-1' option is given to dhclient.&&&&& If PERSISTENT_DHCLIENT=yes, then dhclient will keep on trying&&&&& to contact the dhcp server when it does not respond - no '-1'&&&&& option is given to dhclient. Note: this disables the automatic&&&&& checking for the presence of a link before starting dhclient.&&& DHCPRELEASE=yes|no|1|0&&&&& With this option set to 'yes' (1), when a dhcp configured&&&&& interface is brought down with 'ifdown', the lease will be&&&&& released. Otherwise, leases are not released.&&& DHCP_HOSTNAME=&name&&&&&& Sends the specified hostname to the DHCP server.&&& DHCLIENT_IGNORE_GATEWAY=yes|no|1|0&&&&& If set to 'yes', it will cause dhclient-script to ignore any $GATEWAY&&&&& setting that may be in the ifcfg file for this interface.&&&&& Otherwise, the dhclient session which obtains an ip-address&&&&& on the same subnet as $GATEWAY will set the default route&&&&& to be via $GATEWAY, and no other dhclient session will set&&&&& the default route.&&& DHCLIENTARGS=&&&&& Any additional arguments to dhclient.&&& NM_CONTROLLED=yes|no&&&&& If set to 'no', NetworkManager will ignore this connection/device.&&&&& Defaults to 'yes'.&&& ARPCHECKn=yes|no&&&&& If set to 'no', ifup will not try to determine, if requested ip address&&&&& is used by other machine in network.&&&&& Defaults to 'yes'.&&& IPV4_FAILURE_FATAL=yes|no&&&&& If set to yes, ifup-eth will end immediately after ipv4 dhclient fails.&&&&& Defaults to 'no'.& If BOOTPROTO is not "none", then the only other item that& must be set is the DEVICE all the rest will be determined& by the boot protocol.& No "dummy" entries need to be created.& Base items being deprecated:&&& NETWORK=&will be calculated automatically with ipcalc&&&& BROADCAST=&will be calculated automatically with ipcalc&& Alias specific items:&&& ONPARENT=yes|no&&&&& Whether to bring up the device when the parent device is brought&&&&& up.&&&&& Default: yes& IPv6-only items for real interfaces:&&& IPV6INIT=yes|no&&&&& Enable or disable IPv6 configuration for this interface&&&&& Default: no&&& IPV6FORWARDING=yes|no&&&&& Enable or disable global forwarding of incoming IPv6 packets&&&&& Note: Obsolete in interface specification!&&&&& Default: no&&& IPV6ADDR=&IPv6 address&[/&prefix length&]&&&&& Specify a primary static IPv6 address here&&&&& Optional, if normal host and a router advertisement daemon is on local link&&&&& Required, if node is a router and interface should route packets&&&&& Note: if prefix length is omitted, 64 is assumed&&&&& Example:&&&&&&& IPV6ADDR="3ffe:ffff:0:5::1"&&&&&&& IPV6ADDR="3ffe:ffff:0:1::1/128"&&& IPV6ADDR_SECONDARIES="&IPv6 address&[/&prefix length&] ..." (optional)&&&&& A list of secondary IPv6 addresses (e.g. useful for virtual hosting)&&&&& Example:&&&&&&& IPV6ADDR_SECONDARIES="3ffe:ffff:0:1::10 3ffe:ffff:0:2::11/128"&&& IPV6_MTU=&MTU of link& (optional)&&&&& Optional, dedicated MTU of this link&&&&& Note: Must be greater or equal to 1280.&&&&& Example:&&&&&&& IPV6_MTU="1280"&&& IPV6_PRIVACY=rfc3041&&&&& Enables RFC 3041 IPv6 privacy support if set.&&&&& Default: RFC 3041 support disabled& Special configuration options for multi-homed hosts etc.&&&&&&& IPV6_ROUTER=yes|no: Controls IPv6 autoconfiguration&&&&&&& IPV6_AUTOCONF=yes|no: Controls IPv6 autoconfiguration&&&&&&&& Defaults:&&&&&&&&& Global IPV6FORWARDING=yes: IPV6_AUTOCONF=no, IPV6_ROUTER=yes&&&&&&&&& Global IPV6FORWARDING=no: IPV6_AUTOCONF=yes& Optional settings for a 6to4 tunnel&&& IPV6TO4INIT=yes|no&&&&& Enable or disable 6to4 tunneling setup&&&&& Default: no&&& IPV6TO4_RELAY=&IPv4 address& (optional)&&&&& IPv4 address of the remote 6to4 relay&&&&& Note: if this is omitted, ::192.88.99.1 (the anycast relay address) is chosen&&& IPV6TO4_IPV4ADDR=&IPv6 address&[/&prefix length&] (optional)&&&&& Overwrite local IPv4 address which is accessible from the Internet&&&&&& (optional, in case of static IPv4-NAT behind a router or other special scenarios)&&& IPV6TO4_MTU=&MTU for IPv6& (optional)&&&&& Controls IPv6 MTU for the 6to4 tunnel&&&&& Note: Must be greater or equal to 1280&&&&& Example:&&&&&&& IPV6TO4_MTU="1280"&&&&& Default: MTU of master device - 20&&& IPV6TO4_ROUTING="&device&-&suffix&/&prefix length& ..." (optional)&&&&& A list of routing tokens to setup proper IPv6 interfaces on the LAN&&&&& Example:&&&&&&&& IPV6TO4_ROUTING="eth0-: eth1-:"&&&&&&&& Will create one address per eth0 and eth1, taking given SLA& Optional settings for a 6to4 tunnel or a ppp link&&& IPV6_CONTROL_RADVD=yes|no (optional)&&&&& Enable signaling radvd that the 6to4 prefix has been changed or a&&&&&& preconfigured dynamic device is up or down&&&&& Default: no& IPv6-only items for static tunnel interface:&&& Interface name: sitX (X =& 1)&&& IPV6INIT=yes|no&&&&& Enable or disable IPv6 configuration for this interface&&&&& Default: no&&& IPV6TUNNELIPV4=&IPv4 address&&&&&& Specify IPv4 address of a foreign IPv6-in-IPv4 tunnel endpoint&&&&& Example:&&&&&&& IPV6TUNNELIPV4="1.2.3.4"&&& IPV6TUNNELIPV4LOCAL=&IPv4 address&&&&&& Specify local IPv4 address of tunnel, useful on interfaces with multiple IPv4 addresses&&& IPV6ADDR=&IPv6 address&[/&prefix length&] (optional)&&&& local IPv6 address of a numbered tunnel&&& IPV6ADDR_SECONDARIES="&IPv6 address&[/&prefix length&] ..." (optional)&&&&& A list of secondary IPv6 addresses (example see above)&&& IPV6_MTU=&MTU of tunnel& (optional)&&&&& Optional, dedicated MTU of this tunnel&&&&& Note: Must be greater or equal to 1280&&&&& Example:&&&&&&& IPV6_MTU="1280"&& IPv6-only option to enable DHCPv6 client:&&&&& DHCPV6C=yes|no&&&&& This will enable the DHCPv6 features of dhclient to be run for the interface.&&&&& See man dhclient(8) and dhclient.conf(5).&&&&& DHCPV6C_OPTIONS=...&&&&& This will pass given arguments to the DHCPv6 client.& For example,&&&&& "-S" option will request network information (e.g., DNS addresses)&&&&& only, not IPv6 addresses.& Ethernet-only items:&&& ARP=yes|no (adds 'arp' flag to ifconfig, for use with the&&&&& ethertap device)&&& LINKDELAY=&time in seconds&&&&&& Time that the system should pause after the specific interface is&&&&& enabled.& This may be useful if one interface is connected to a&&&&& switch which has spanning tree enabled and must wait for STP to&&&&& converge before the interface should be considered usable.&&& BRIDGE=&br* device&&&&&& If set, the ethernet device is not assigned an address.& It is added to&&&&& the specified bridge device instead.&& Deprecated, but supported:&&& ETHTOOL_OPTS=...&&&&& Any device-specific options supported by ethtool. For example,&&&&& if you wanted to force 100Mb full duplex:&&&&&&& ETHTOOL_OPTS="speed 100 duplex full autoneg off"&&&&& Note that changing speed or duplex settings almost always&&&&& requires disabling autonegotiation with 'autoneg off'.&&&&& Long term, this should be done by sysadmin-written udev rules.&&& No longer supported:&&&& PROMISC=yes|no (enable or disable promiscuous mode)&&&& ALLMULTI=yes|no (enable or disable all-multicast mode)&&&& To properly set these, use the packet socket interface.& Ethernet 802.1q VLAN items:&&&& DEVICE=eth0.42&&&&&& Initscripts use the device name for VLAN devices.&&&&&&&&&&&&&& Example: eth0.42 for vlan 42 on device eth0.&&&&&& Valid VLAN ID range is 0-4095. Most ethernet switches reserve&&&&&& VLAN ID 1 to be used as management VLAN; starting from VLAN&&&&&& ID 2 is recommended.&&&& REORDER_HDR=yes|no&&&&&& When enabled the VLAN device will move the ethernet header&&&&&& around to make it look exactly like a real ethernet device.&&&&&& This may help programs such as ISC dhcpd which read the raw&&&&&& ethernet packet and make assumptions about the location of&&&&&& bytes. If you don't need it turn it off because there&&&&&& is a small performance penalty. Default is on.& PPP/SLIP items:&&& PERSIST=yes|no&&& MODEMPORT=&device, say /dev/modem&&&& LINESPEED=&speed, say 115200&&&& DEFABORT=yes|no (tells netcfg whether or not to put default&&&&& abort strings in when creating/editing the chat script and/or&&&&& dip script for this interface)&&&&& (meaningless with WVDIALSECT)& PPP-specific items&&& WVDIALSECT=&list of sections from wvdial.conf to use&&&&&& If this variable is set, then the chat script (if it&&&&& exists) is ignored, and wvdial is used to open the&&&&& PPP connection.&&& DEFROUTE=yes|no (set this interface as default route? yes is default)&&& DEBUG=yes|no (defaults to yes)&&&&& turns on/off pppd and chat (if used) debugging.&&& ESCAPECHARS=yes|no (simplified interface here doesn't let people&&&&& specify which
almost everyone can use&&&&& asyncmap
anyway, and they can set PPPOPTIONS to&&&&& asyncmap foobar if they want to set options perfectly)&&& HARDFLOWCTL=yes|no (yes implies "modem crtscts" options)&&& PPPOPTIONS=&arb is placed last on the&&&&& command line, so it can override other options like asyncmap&&&&& that were specified differently&&&& PAPNAME=&"name $PAPNAME" on pppd command line& (note that&&&&& the "remotename" option is always specified as the logical&&&&& ppp device name, like "ppp0" (which might perhaps be the&&&&& physical device ppp1 if some other ppp device was brought&&&&& up earlier...), which makes it easy to manage pap/chap&&&&& files -- name/password pairs are associated with the&&&&& logical ppp device name so that they can be managed&&&&& together.&&& REMIP=&remote ip address, normally unspecified&&&& MTU=&&& MRU=&&& DISCONNECTTIMEOUT=&number of seconds, default currently 5&&&&&& (time to wait before re-establishing the connection after&&&&& a successfully-connected session terminates before attempting&&&&& to establish a new connection.)&&& RETRYTIMEOUT=&number of seconds, default currently 60&&&&&& (time to wait before re-attempting to establish a connection&&&&& after a previous attempt fails.)&&& RETRYCONNECT=yes|no (defaults to yes)&&&&& If this is yes, then we will re-run pppd if it exits with a&&&&& "connect script failed" status.& Otherwise, only one attempt&&&&& is made to bring up the connection.& Note that some connect&&&&& scripts (for example, wvdial) might do their own retries (such&&&&& as BUSY or NO DIALTONE conditions).&&& MAXFAIL=&number&&&&&& If this is set, this will cause ppp-watch to exit after&&&&& the specified number of attempts.&&& DEMAND=yes|no&&&&& Switches on demand-dialing mode using pppd's "demand" option.&&& IDLETIMEOUT=600&&&&& The amount of time the link needs to be inactive before pppd will&&&&& bring it down automatically.&&& BOOTTIMEOUT=30&&&&& The amount of time to wait at boot before giving up on the&&&&& connection.& IPPP-specific items (ISDN)&&& PROVIDER=&ProviderName&&&&&&&&& USER=&Login&&&& PASSWORD=&Password&&&&&&&&& ENCAP=[syncppp|]&&& DIALMODE=[manual|auto]&&& SECURE=off|on&&&&&&&& MSN=&&&&&&&&&& PHONE_IN=&Callback.Number&&&&&&&&&&&&&&&&& AREACODE=&&&&&&&&&& REGIONCODE=&&&&&&&&&& PHONE_OUT=&PhoneNumber&&&& BUNDLING=off|on&&& HUPTIMEOUT=&number&&&& DNS1=&PrimaryDNS&&&& DNS2=&SecondaryDNS&&&& DOMAIN=""&&& LAYER=[HDLC|]&&& CALLBACK=off|on&&& CHARGEHUP=&number&&&& CHARGEINT=&number&&&& CBHUP=&number&&&& CBDELAY=&number&&&& DIALMAX=&number&&&& AUTH=[+pap] [-chap]&&& IHUP=&&&&& DELDEFAULTROUTE=[enabled|disabled]&&& CBCP=off|on&&& VJ=off|on&&& VJCCOMP=off|on&&& AC=off|on&&& PC=off|on&&& BSDCOMP=off|on&&& CCP=off|on&&& SLAVE_DEVICE=ippp[0-9]& ippp0 items being deprecated:&&& BOOT=[on|off] will be converted to ONBOOT=[yes|no] by netconf&&& LOCAL_IP=&&&& will be converted to IPADDR by netconf&&& REMOTE_IP=&&& will be converted to GATEWAY by netconf& Wireless-specific items:&&& See iwconfig(8) for additional information.&&& MODE=[Ad-Hoc|Managed|Master|Repeater|Secondary|Monitor|Auto]&&& ESSID=&&&&& Defaults to "any".&&& NWID=&&& FREQ=&&&&& Ignored if MODE=Managed.&&& CHANNEL=&&&&& Ignored if MODE=Managed.&&& SENS=&sensitivity threshold&&&& RATE=&&& KEY{1,2,3,4}=&WEP key with the given index&&&& DEFAULTKEY=&default key index&&&& KEY=&default WEP key&&&& SECURITYMODE=[on|off|open|restricted]&&& RTS=[auto|fixed|off|&rts threshold&]&&& FRAG=[off|&fragmentation threshold&]&&& IWCONFIG=&other iwconfig(8) options&&&& SPYIPS=&list of IP addresses to monitor for link quality&&&& IWPRIV=&iwpriv(8) commands&& Bonding-specific items&&& SLAVE=yes&&&&& Specifies device as a slave&&& MASTER=bondXX&&&&& Specifies master device to bind to&&& BONDING_OPTS=&&&&& A space-separated list of options to the bonding driver for this&&&&& interface, such as:&&&&& "mode=active-backup arp_interval=60 arp_ip_target=192.168.1.1,192.168.1.2"& Tunnel-specific items:&&& TYPE=GRE|IPIP&&& MY_INNER_IPADDR=local IP address of the tunnel interface&&& PEER_OUTER_IPADDR=IP address of the remote tunnel endpoint&&& MY_OUTER_IPADDR=IP address of the local tunnel endpoint&&&&& If unspecified, an IP address is selected automatically for outgoing&&&&& tunnel packets, and incoming tunnel packets are accepted on all local&&&&& IP addresses.&&& PEER_INNER_IPADDR=IP address of the remote end of the tunnel interface&&&&& If this is specified, a route to PEER_INNER_IPADDR through the tunnel&&&&& is added automatically.&&& TTL=TTL value for tunnel packets&&&&& Default is to use the TTL of the packet transported through the tunnel& Bridge-specific items:&&& TYPE=Bridge&&& STP=off|on (see 'brctl stp')&&& DELAY=forward delay time in seconds (see 'brctl setfd')&&& BRIDGING_OPTS=&&&&& A space-separated list of bridging options for either the bridge&&&&& device, or the port device, such as:&&&&& BRIDGING_OPTS="hello_time=200 priority=65535"&&&&&&& for bridge devices, or&&&&& BRIDGING_OPTS="hairpin_mode=1"&&&&&&& for port devices.& TUN/TAP-specific items:&&& OWNER=&owner of the device&
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Ubuntu 11.04 DHCP server 和 ipv6 备忘
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本篇文章主要介绍了"Ubuntu 11.04 DHCP server 和 ipv6 备忘"，主要涉及到Ubuntu 11.04 DHCP server 和 ipv6 备忘方面的内容，对于Ubuntu 11.04 DHCP server 和 ipv6 备忘感兴趣的同学可以参考一下。
.cn/s/blog_71d9aee.html & 两台笔记本 A和B & A: Ubuntu 11.04 + 有线网卡(eth0) + 无线网卡(eth1) B: Windows 7 + 有线网卡 + 无线网卡 A，B的无线网卡都连接到家庭无线路由器，网关为192.168.0.1，可以上互联网。A,B的有线网卡通过网线直连，A作为DHCP server和网关，为B的有线网卡分配IP地址 & A安装DHCP server步骤: 1. sudo apt-get install dhcp3-server 2. vi /etc/default/isc-dhcp-server INTERFACES=&eth0& 3. 给eth0配置ipv4静态地址: 192.168.1.1。 注意不要用network connection配置静态IP，它不会写/etc/network/interfaces文件，导致dhcp server无法自动启动。 为了使DHCP server在启动时自动启动，vi /etc/network/interfaces, 加入: auto eth0 iface eth0 inet static address 192.168.1.1 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255 & 4.vi /etc/dhcp/dhcpd.conf subnet 192.168.1.0 netmask 255.255.255.0 { range 192.168.1.10 192.168.1.200; option broadcast-address 192.168.1.255; option routers 192.168.1.1; default-lease-time 6000; max-lease-time 8000000; } & 5. sudo /etc/init.d/isc-dhcp-server start 如果出错，查看/var/log/syslog的错误提示 & A安装玩DHCP server后，B的有线网卡可以分配到IP地址。但是B不能上互联网了。 route print 0.0.0.0 0.0.0.0 192.168.0.1 192.168.0.99 26 0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.10 10 连互联网时都走HOP数小的192.168.1.1路由，导致无法上互联网。 & 运行下面命令解决问题： route delete 0.0.0.0 route add 0.0.0.0 mask 0.0.0.0 192.168.0.1 route add 192.168.1.0 mask 255.255.255.0 192.168.1.1 & 实验2：B关闭无线网卡，希望通过A作为路由器来连互联网 & 1. 在DHCP服务器的配置文件中，加入DNS服务器。这样B才能通过A知道DNS服务器的地址 vi /etc/dhcp/dhcpd.conf subnet 192.168.1.0 netmask 255.255.255.0 { range 192.168.1.10 192.168.1.200; option broadcast-address 192.168.1.255; option routers 192.168.1.1; option domain-name-servers 180.168.255.18; default-lease-time 6000; max-lease-time 8000000; } & 2. A中打开ip包转发功能, vi /etc/sysctl.conf，删除下面一行的注释 net.ipv4.ip_forward=1 (sudo sysctl -p 使改变的配置立即生效) 同时添加iptables(临时方法，重启后会失效): & sudo iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -o eth1 -j MASQUERADE sudo iptables-save 永久保存 (-o eth1 指定output network interface为eth1) 实验3：A使用radvd(Router Advertisement Daemon)为B分配ipv6地址 & radvd 使用 Neighbor Discovery Protocol (NDP) as specified in RFC 2461 & 1. sudo apt-get install radvd 2. vi /etc/radvd.conf (需新建该文件)，如下面几行: interface eth0 { MinRtrAdvInterval 3; MaxRtrAdvInterval 10; AdvLinkMTU 1280; AdvSendA prefix fec0:33::/64 { AdvOnL AdvA AdvValidLifetime 86400; AdvPreferredLifetime 86400; AdvRouterA }; }; & 3. 在/etc/sysctl.conf 中打开 net.ipv6.conf.all.forwarding=1 & 4. sudo /etc/init.d/radvd start (如果在 radvd 运行状态下重启机器，radvd 会在开机后自动运行) & 5. 在B上运行ipconfig: 以太网适配器 本地连接: 连接特定的 DNS 后缀 . . . . . . . : 本地站点的 IPv6 地址. . . . . . . : fec0:33:a432:4f4d:72bf:ed0a%1 本地链接 IPv6 地址. . . . . . . . : fe80::a432:4f4d:72bf:ed0a IPv4 地址 . . . . . . . . . . . . : 192.168.1.10 子网掩码 . . . . . . . . . . . . : 255.255.255.0 默认网关. . . . . . . . . . . . . : fe80::211:43ff:fe76:cb8 & 注意windows下 fec0:33:a432:4f4d:72bf:ed0a%1 中的%1表示网络接口编号 & ping本机地址: C:\&ping fec0:33:a432:4f4d:72bf:ed0a (本地站点地址) 正在 Ping fec0:33:a432:4f4d:72bf:ed0a 具有 32 字节的数据: 来自 fec0:33:a432:4f4d:72bf:ed0a 的回复: 时间&1ms & C:\&ping fe80::a432:4f4d:72bf:ed0a (本地链路地址) 正在 Ping fe80::a432:4f4d:72bf:ed0a 具有 32 字节的数据: 来自 fe80::a432:4f4d:72bf:ed0a 的回复: 时间&1ms & 6.A 上运行ifconfig $ifconfig eth0 Link encap:Ethernet HWaddr 00:11:43:76:0c:b8 inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::211:43ff:fe76:cb8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4634 errors:0 dropped:0 overruns:0 frame:0 TX packets:1299 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:7.9 KB) TX bytes:8.9 KB) Interrupt:18 ping本机地址 (注意linux上ping6的用法，必须指定接口): $ ping6 -I eth0 fe80::211:43ff:fe76:cb8 PING fe80::211:43ff:fe76:cb8(fe80::211:43ff:fe76:cb8) from fe80::211:43ff:fe76:cb8 eth0: 56 data bytes 64 bytes from fe80::211:43ff:fe76:cb8: icmp_seq=1 ttl=64 time=0.046 ms 7. B ping A C:\&ping fe80::211:43ff:fe76:cb8 正在 Ping fe80::211:43ff:fe76:cb8 具有 32 字节的数据: 来自 fe80::211:43ff:fe76:cb8 的回复: 时间&1ms & 8. A ping B $ ping6 -I eth0 fe80::a432:4f4d:72bf:ed0a PING fe80::a432:4f4d:72bf:ed0a(fe80::a432:4f4d:72bf:ed0a) from fe80::211:43ff:fe76:cb8 eth0: 56 data bytes 64 bytes from fe80::a432:4f4d:72bf:ed0a: icmp_seq=1 ttl=64 time=0.733 ms g$ ping6 -I eth0 fec0:33:a432:4f4d:72bf:ed0a connect: Network is unreachable A只能ping通B的本地链路地址，无法ping通本地站点地址。因为使用本地站点地址作为源或目的地址的数据报文不会被转发到本站点（相当于一个私有网络）外的其它站点，B的本地站点地址只能在B本地使用。 & 实验4: A 使用 wide-dhcpv6-server 为B分配ipv6地址 1. sudo apt-get install wide-dhcpv6-server 2. vi /etc/dhcp/dhcpd6.conf &
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