Enterasys Networks VH-8TX1MF Manuale Utente Scaricare il pdf (Pagina 19)

9033718-01 Product Overview 5

fails for any reason, a disabled alternative is activated, thereby

maintaining the connection. This prevents network traffic from circulating

in an endless loop formed by multiple connections to the same LAN

segment.

Spanning Tree parameters are configurable using the Spanning Tree

Configuration Menu of the console menus, the on-board Web agent, or

via SNMP (see Appendix B, “Spanning Tree Concepts,” in the

Management Guide for more information).

Frame Buffering and Frame Latency

The VH-8TX1UM/VH-8TX1MF switch is a store-and-forward switching

device. Each frame is copied into switch memory before being forwarded

to another port. This method ensures that all forwarded frames conform

to a standard Ethernet frame size and have a correct cyclic redundancy

check (CRC) for data integrity. This switching method prevents bad

frames from traversing the network and using up valuable network

bandwidth, as with cut-through switching technology.

To minimize the possibility of dropping frames on congested ports, the

VH-8TX1UM/VH-8TX1MF switch provides 128 KB of frame buffering per

port. This buffer space is used to queue packets for transmission on

congested networks. This is an additional advantage over cut-through

switching technology, which drops packets immediately when

experiencing collisions.

Software Download

The VH-8TX1UM/VH-8TX1MF switch supports the industry-standard

Trivial File Transfer Protocol (TFTP) for downloading software to the

switch. All switch software is stored in a 2 MB sectored flash ROM. The

download feature allows you to easily install software upgrades to the

unit. Software can alternatively be downloaded via the serial console port

using the XMODEM protocol.

A TFTP software download is invoked via the Management Setup Menu

using the console menus. A TFTP download can also be invoked using

the on-board Web agent or via SNMP.

Non-Volatile Parameter Storage

Important operating parameters such as IP addresses, Spanning Tree

configuration, and management security parameters, are stored in non-

volatile flash memory. These values are retained when the switch

experiences power interruptions or is powered down for normal

maintenance.

Configuration and Management Interfaces

The VH-8TX1UM/VH-8TX1MF switch can be managed using any of the

following methods:

• Serial console, out-of-band

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 53 54

Commenti su questo manuale

Nessun commento

Enterasys Networks VH-8TX1MF Manuale Utente Pagina 19

Commenti su questo manuale

Prodotti e manuali riguardandi Switch di rete Enterasys Networks VH-8TX1MF