My Netwok Dictionary

Depending on the WAN technology is used to configure the right kind of scope.

The following command in interface mode enables the encapsulation:

Router (config-if) # encapsulation [encapsulation type]

Among the WAN encapsulation types are listed:

• HDLC, High-Level Data Link Control, is the default encapsulation type for Cisco routers, is a protocol synchronous data link owner.

• PPP, Point-to-Point Protocol is a standard protocol that provides connections from router to router and network host. It uses synchronous and asynchronous links. Use authentication mechanisms such as PAP and CHAP. Read the rest of this entry »

Introduction

NAT (Network Address Translation) can access the Internet by translating the private addresses into registered IP addresses. Increased security and privacy of your home network to translate the internal address to one external.

NAT has several forms of work as required and flexibility is available, either of which is extremely important in controlling the outbound traffic:

Static NAT allows one to one mapping between local and external addresses or global.

Dynamic NAT allows a network to assign internal IP to external number included in a group or pool of addresses.

PAT (Port Address Traslation) is a form of dynamic NAT assigns multiple IP addresses internal to external one. PAT uses source port numbers are unique in the global address internal to distinguish between the different translations. Read the rest of this entry »

HUB

hub

1. The data sent are sent on all ports to devices that decode the frame header to see if they are the recipients.
2. The total bandwidth is limited to speed hub. A 100 base-T hub provides 100 Mbps of bandwidth shared between all PCs, regardless of the number of ports.
3. Not compatible “half-duplex. A port 100 Mbps allows just one link to 100 Mbps.

SWITCH

switch

1. The data sent from one computer to another are only received by the addressee. If another computer sends data to the printer, they are completely separated; the two communications can be done simultaneously.
2. The bandwidth is determined by the number of ports. i.e., A 100 Mbps 8-Port Switch can handle up to 800 Mbps half duplex, dual full duplex.
3. They are compatible full-duplex, doubling the speed of each port, 100 Mbps to 200 Mbps for Ethernet 100 Base T.

The first step in configuring Frame-Relay is the activation of the interface that connects to the router with a CSU / DSU, in turn connected to the switch of supplier.
In addition to the IP address must be set the encapsulation type:

• No IETF cisco equipment.

• Cisco equipment, for choosing this encapsulation will not need to specify it.

Router (config) # interface serial 1
Router (config-if) # ip address [IP + direction mask]
Router (config-if) # encapsulation frame-relay [cisco / ietf]
Router (config-if) # bandwidth [bandwidth value in Kbps] Read the rest of this entry »

By establishing a connection to a CSU / DSU can supply various PVC on a single physical connection. For this purpose it is necessary to configure subinterfaces act as logical interfaces connected to the PVC.

A subinterface is no default connection and can be configured as:

Point to point: each subinterface PVC provides a direct connection point to point with a corresponding remote router. The routing update traffic is NOT subject to the rule of split horizon.

Multipoint: a subinterface PVC provides multiple connections through the Frame-Relay cloud to multiple physical interfaces or subinterfaces on remote routers. The routing update traffic is subject to the rule of split horizon. Read the rest of this entry »