CERNET Center CERNICIPv4IPv4地址申请培训（续）地址申请培训（续）CERNICCERNIC 2004-042004-04CERNET Center CERNIC申请中的难点问题申请中的难点问题n nold-networkold-network：l l常见问题：常见问题：n na. a. 固定边界；固定边界；n nb. b. 地址划分错误。地址划分错误。l l语法检查工具：语法检查工具： http:/www.nic.edu.cn/RS/oldnet.htmlhttp:/www.nic.edu.cn/RS/oldnet.htmlCERNET Center CERNIC申请中的难点问题申请中的难点问题1. 1.以传统的以传统的1 1个个C C为固定边界划分子网为固定边界划分子网n n将多个子网硬凑成将多个子网硬凑成1 1个个C C，例如：，例如： old-network: 166.111.1.0 255.255.255.0 YES 256 80/156/252 Dept Of Mechanics & old-network: 166.111.1.0 255.255.255.0 YES 256 80/156/252 Dept Of Mechanics & Dept Of Electric power & Dept Of Economy Management & Dept Of Culture and ArtsDept Of Electric power & Dept Of Economy Management & Dept Of Culture and Arts 应该将每个系所用途的子网单独描述出来，譬如应该将每个系所用途的子网单独描述出来，譬如, ,子网大小实际上可能是：子网大小实际上可能是： old-network: 166.111.1.0 255.255.255.128 YES 128 d/d/d Dept of Mechanicsold-network: 166.111.1.0 255.255.255.128 YES 128 d/d/d Dept of Mechanics old-network: 166.111.1.128 255.255.255.192 YES 64 d/d/d Dept of Electric Power old-network: 166.111.1.128 255.255.255.192 YES 64 d/d/d Dept of Electric Power old-network: 166.111.1.192 255.255.255.224 YES 32 d/d/d Dept of Economy Management old-network: 166.111.1.192 255.255.255.224 YES 32 d/d/d Dept of Economy Management old-network: 166.111.1.224 255.255.255.224 YES 32 d/d/d Dept of Culture and Artsold-network: 166.111.1.224 255.255.255.224 YES 32 d/d/d Dept of Culture and Artsn n将一个较大的子网硬拆分成多个将一个较大的子网硬拆分成多个C C。 例如：例如： old-network: 166.111.2.0 255.255.255.0 YES 256 120/130/150 Library old-network: 166.111.2.0 255.255.255.0 YES 256 120/130/150 Library old-network: 166.111.3.0 255.255.255.0 YES 256 200/250/253 Library old-network: 166.111.3.0 255.255.255.0 YES 256 200/250/253 Library 子网大小应为子网大小应为/23/23，譬如，譬如子网大小实际上是子网大小实际上是: :old-network: 166.111.2.0 255.255.254.0 YES 512 d/d/d Libraryold-network: 166.111.2.0 255.255.254.0 YES 512 d/d/d LibraryCERNET Center CERNIC申请中的难点问题申请中的难点问题n nold-networkold-network：l l子网划分错误子网划分错误可能出现的错误：可能出现的错误： old-network: 166.111.3.0 255.255.254.0 YES 512 d/d/d Libraryold-network: 166.111.3.0 255.255.254.0 YES 512 d/d/d Library old-network: 166.111.5.0 255.255.255.0 YES 256 d/d/d Libraryold-network: 166.111.5.0 255.255.255.0 YES 256 d/d/d Library应修改为：应修改为： old-network: 166.111.3.0 255.255.255.0 YES 256 d/d/d Libraryold-network: 166.111.3.0 255.255.255.0 YES 256 d/d/d Library old-network: 166.111.4.0 255.255.254.0 YES 512 d/d/d Libraryold-network: 166.111.4.0 255.255.254.0 YES 512 d/d/d LibraryCERNET Center CERNIC申请中的难点问题申请中的难点问题n nnetwork-plannetwork-plan：l l常见问题：常见问题：n na. a. 没有按需分配地址；没有按需分配地址；n nb. b. 学生宿舍和教工宿舍信息不完整；学生宿舍和教工宿舍信息不完整；n nc. c. 地址分配没有统一标准。地址分配没有统一标准。l l语法检查工具语法检查工具 http:/www.nic.edu.cn/RS/netplan.htmlhttp:/www.nic.edu.cn/RS/netplan.htmlCERNET Center CERNIC申请中的难点问题申请中的难点问题n nnetwork-plannetwork-plan：l l a. a. 没有按需分配地址；没有按需分配地址； network-plan: 0.0.0.0 255.255.252.0 YES 1024 500/600/700 network-plan: 0.0.0.0 255.255.252.0 YES 1024 500/600/700 No. 1 No. 1 of undergraduate student Dorm. (175rooms, 700students) of undergraduate student Dorm. (175rooms, 700students) 正确的划分，正确的划分，700700台主机，注意拆分为台主机，注意拆分为 /23+/24/23+/24 network-plan: 0.0.0.0 255.255.254.0 YES 512 400/450/500 network-plan: 0.0.0.0 255.255.254.0 YES 512 400/450/500 No. 1 No. 1 of undergraduate student Dorm. (175rooms, 700students)of undergraduate student Dorm. (175rooms, 700students) + + network-plan: 0.0.2.0 255.255.255.0 YES 256 100/150/200 network-plan: 0.0.2.0 255.255.255.0 YES 256 100/150/200 + + No. 1 No. 1 of undergraduate student Dorm. (175rooms, 700students)of undergraduate student Dorm. (175rooms, 700students)CERNET Center CERNIC申请中的难点问题申请中的难点问题n nnetwork-plannetwork-plan：l lb. b. 学生宿舍和教工宿舍信息不完整；学生宿舍和教工宿舍信息不完整； network-plan: 0.0.3.0 255.255.255.128 YES 128 50/80/120network-plan: 0.0.3.0 255.255.255.128 YES 128 50/80/120 No. 2 of No. 2 of studentstudent Dorm. ( Dorm. (60rooms60rooms, , 120students120students) )完整的信息应包括：学生类型，人数，完整的信息应包括：学生类型，人数， 房间数房间数 network-plan: 0.0.3.0 255.255.255.128 YES 128 50/80/120network-plan: 0.0.3.0 255.255.255.128 YES 128