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Cisco 1502 (CISCO1502-8E) Networking Hub Reviews

Cairo India
Hub
Sep 14, 2009 12:01 AM

Overview of the Hub


The Cisco Micro Hub is a small, desktop hub used for connecting network devices in a small branch or remote office. You can connect up to eight network devices to one Cisco Micro Hub.


By purchasing a Cisco Micro Hub, you can be confident about designing, installing, and maintaining a reliable, scaleable, easy-to-configure network for your branch office or small business.


•Cisco Micro Hub Overview—A description of where the Cisco Micro Hub fits into your network. •Cisco Micro Hub Features—Detailed description of the hub's features and benefits. •Hub Connectors—Detailed description of the connectors on the rear panel of the hub.


•Hub LEDs—Detailed description of the informative LEDs on the front panel of the hub. Cisco Micro Hub Overview


•Micro Hub 1502—An 8-port hub that does not have a CONSOLE port, but can be monitored and controlled by connecting it to a Micro Hub 1503.


You can use any of the hub models as a standalone networking device, or connected to other compatible 10BaseT hubs or switches to form a larger network. You can also stack and connect up to four hubs through rear panel ports, to form a larger network.


By adding one Micro Hub 1503 to a stack of Micro Hub 1502s, you can configure and manage all the hubs in the stack from a remote location. Stacking four Cisco Micro Hubs together enables you to manage up to 32 hub ports. bootp collision


When two devices on an Ethernet network transmit data at the same time, the data packets from each device collide on the network cable and are damaged.


Ethernet


A type of LAN that connects network devices by cable and data is broken into packets before being sent to the destination on the cable.


firmware


Software that is stored in read-only memory(ROM). The hub uses this type of software. Firmware controls hub operation when the hub is first powered up.


An IP address identifies a device on an IP network is in the following form: xxx.xxx.xxx.xxx, where xxx is a number between 0 and 255. The actual numbers used in an IP address depend on what type of IP network the device is on(Class A, Class B, or Class C).


IPX


Protocol used by Novell NetWare. A router with IPX routing can interconnect LANs so that Novell NetWare clients and servers can communicate.


LAN


local-area network—A geographically limited network, usually within one office or building. Ethernet is an example of a LAN standard.


loop


Occurs when network devices are connected to each other by more than one path. The Cisco Micro Hub detects when a loop occurs and breaks the loop by isolating one path.


packet


A logical unit of data. Devices on an Ethernet network send information back and forth in data packets.


partition


In order to maintain network efficiency, the hub partitions a malfunctioning network device from the rest of the network. The hub does this automatically in some cases, for example, if there are too many data collisions caused by packets being sent from from the device. You can use the port-operation command to manually partition any network device connected to the hub.


protocol


A set of rules that describes how data is transmitted between devices on a network. For example, some protocols describe electrical and physical standardst. Other protocols define how the data is formatted on a LAN and on a WAN.


You can use a straight-through Ethernet cable when connecting devices to port 5 on the Cisco Micro Hub. Use the The MDI/MDI-X button on the rear panel of the hub to configure port 5 for the the following two types of connections:


•Connecting to a network device—When connecting port 5 to a network device such as a PC, workstation, router, or server(that use MDI ports), leave the button in the default position(OUT), and connect the device to port 5.


•Connecting to other hubs—When connecting port 5 to another hub or switch(that does not have the rear panel IN and OUT ports) such as the Micro Hub 1501 or other compatible 10BaseT hubs, push the button to the IN position, and connect the hub to port 5.


Serial Line Internet Protocol—A network protocol that enables IP information, normally used on Ethernet, to be used over a serial line.


subnet mask


A bit mask used to identify which bits in an IP address correspond to the network portion of the IP address and which bits correspond to the device portions of the IP address. A subnet mask is in the form of an IP address, usually beginning with 255.


TCP/IP


Transmission Control Protocol/Internet Protocol—A group of protocols that defines how data is transferred between network devices.


Telnet


A network protocol used for logging into a system from a remote location.


Terminal emulation software


Software that enables a computer to function as a terminal, for example a VT100. The computer then appears as a terminal to the device that it is connected to.


TFTP


Trivial File Transfer Protocol—This is an optional way to boot up the hub, using the bootup-option tftp-download command. This command configures the hub to download operating firmware from a TFTP server that is on the same LAN as the hub every time the hub is turned on.


WAN


wide-area network—A network that extends over a larger distance than a LAN. Devices on the network are usually connected over serial, ISDN, or analog lines.


•Hubs connected to a Micro Hub 1503 are automatically configured.


High performance


•Automatically partitions and reconnects network devices that cause too many network collisions.


•Performs self-tests during the power-on process.


•Automatically detects and corrects network wiring errors.


•Automatically assigns hub IDs for automatic stack configuration.


Multiple users


•Eight Ethernet ports for connecting devices to the network.


•Port 5 can be used to connect the Micro Hub 1503 to a compatible 10BaseT hub or switch, eliminating the need for special cables.


•Two rear panel ports for connecting up to four hubs in a stack(Micro Hub 1502, Micro Hub 1503).


Upgradeable


(Micro Hub 1503)


••Flash memory on board for easy firmware updates, including SNMP agent updates.


Network management features


(Micro Hub 1503)


•Hub management over the network using SNMP when the stack includes a Micro Hub 1503(optional network management software not included with this package).


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