Para lograr la coordinación entre las AAPP se generarán unas tablas con los rangos de dirección IP asignados a cada Administración.
Routing Plan and interconnection of networks in the administration
is based on the establishment of a directory of network addresses IP, from which each entity or body can establish their independent numbering plans IP, depending on its network infrastructure, or departmental organizational or distribution, but keeping a coordination that avoids the use of directions duplicates. The basic considerations that have been taken as a starting point are:
- The routing plan takes into account the forecast that medio-largo run all units of the administration could count on local networks. Each local network of a centre will operate as a subnet inside the global network of administration.
- Set a routing system according To Class, adopting the range of addresses 10.0.0.0 to 10.255.255.255 - private use of the administration as recommended in the document RFC 1597.
- To simplify the configuration of networks and routing procedures you can choose to use network masks 24-bit, with which it is possible to define separate subnets 64516 with capacity equivalent to that type (C networks can connect up to 254 10 nodes by segment. With this approach the netmask that uses any equipment would be 255.255.255.0 regardless of their physical location. However since most current teams on the use of masks variables, it is recommended reading detailed RFC-1219 "on the assignement of please numbers (April 1991)" presenting the concepts of bits of growth (grouth bits) whose application allows routing plans very flexible. It is also important to take into account the concepts of aggregation of networks "superneting" when distributing the numbering in each centre, according to the actual topology to simplify network routing tables.
- The initial distribution of routing space is centrally by the secretariat of the High Council of E-government depending on the needs of each centre Manager taking into account criteria of organization, flexibility and streamlining. Once assigned a range of addresses will be the responsibility of the center determine how to use them and establish a plan of routing own that takes into account the characteristics of your IT infrastructure and communications.
- The last group of bits allocated to the identification of the Host (typically 8 in class (C) will be used ascending to allow potential "subnetings" future in areas not yet assigned (RFC 1219).
Para facilitar la gestión de los equipos se recomienda reservar unos valores de direcciones bajos para los servidores y los equipos de comunicaciones.
La numeración de los equipos de usuarios, típicamente ordenadores personales o estaciones de trabajo, comenzará por encima de dicho valor.
Por ejemplo, si se está utilizando un subneting que asigna 8 bits a la dirección de nodo (antigua clase C) una recomendación podría ser la asignación del número decimal "10" al router de comunicaciones principal de la red y de forma descendente a partir de ahí (9, 8, 7) para otros equipos especiales, dejando los números 1 a 5 para host que ofrezcan servicios globales. La asignación al resto de equipos comenzaría en el número "11" de forma ascendente.
This tool allows you to fill in the allocation the first addresses within the range and make free recent groups of directions for possible segmentation and use in other networks that need it.
In order to ensure a correct network administration, it is necessary to permanently monitor numbering plan in each subnet and updating the documentation of changes that occur in the same for this, it is recommended to develop a table similar to the collection in this document, through the collected regularly, and for each unit, the allocation of directions done in each subnet.