Compaq SW3323 Manual De Usuario
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1-10
Overview
Writer: Fran Spragens Project: Overview Comments: 355307-002
File Name:3324_1.doc Last Saved On:3/16/99 11:31 AM
Frame Buffering and Frame Latency
The 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.
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 switch
provides 4 MB of dynamically allocated frame buffering per 8 10/100 ports and
8 MB per gigabit 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.
provides 4 MB of dynamically allocated frame buffering per 8 10/100 ports and
8 MB per gigabit 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 switch supports the industry-standard Trivial File Transfer Protocol (TFTP)
for downloading software to the switch. All switch software is stored in a 1 MB
sectored Flash ROM. The download feature allows you to easily install
software upgrades to the unit. Compaq Networking Management Software
includes a TFTP server and a configuration application to allow for the software
downloads. Software can alternatively be downloaded via the serial console
port using the XMODEM protocol.
for downloading software to the switch. All switch software is stored in a 1 MB
sectored Flash ROM. The download feature allows you to easily install
software upgrades to the unit. Compaq Networking Management Software
includes a TFTP server and a configuration application to allow for the software
downloads. Software can alternatively be downloaded via the serial console
port using the XMODEM protocol.
A TFTP or XMODEM software download is invoked via the Download
Software Menu using the console menus. A TFTP download can also be
invoked via SNMP.
Software Menu using the console menus. A TFTP download can also be
invoked 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 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.