Foundry Networks OSI Manuale Utente
A
BOUT
THE
E
DGE
I
RON
4802CF
2-2
© 2003 Foundry Networks, Inc.
February 2003
Switch Architecture
The EdgeIron 4802CF employs a wire-speed, non-blocking switching
fabric. This permits simultaneous wire-speed transport of multiple packets
at low latency on all ports. This switch also features full-duplex capability
on all ports, which effectively doubles the bandwidth of each connection.
fabric. This permits simultaneous wire-speed transport of multiple packets
at low latency on all ports. This switch also features full-duplex capability
on all ports, which effectively doubles the bandwidth of each connection.
Switching Method
The switch uses store-and-forward switching to ensure maximum data
integrity. With store-and-forward switching, the entire packet must be
received into a buffer and checked for validity before being forwarded.
This prevents errors from being propagated throughout the network.
The switch uses store-and-forward switching to ensure maximum data
integrity. With store-and-forward switching, the entire packet must be
received into a buffer and checked for validity before being forwarded.
This prevents errors from being propagated throughout the network.
Management Options
The EdgeIron 4802CF contains a comprehensive array of LEDs for “at-a-
glance” monitoring of network and port status. It also includes a built-in
network management agent that allows the switch to be managed in-band
using SNMP or RMON (Groups 1, 2, 3 and 9) protocols, with a Web
browser, or remotely via Telnet. The switch provides an RS-232 serial port
(DB-9 connector) on the front panel for out-of-band management. A PC
may be connected to this port for configuration and monitoring out-of
band via a null-modem cable. (See Appendix B for wiring options.)
glance” monitoring of network and port status. It also includes a built-in
network management agent that allows the switch to be managed in-band
using SNMP or RMON (Groups 1, 2, 3 and 9) protocols, with a Web
browser, or remotely via Telnet. The switch provides an RS-232 serial port
(DB-9 connector) on the front panel for out-of-band management. A PC
may be connected to this port for configuration and monitoring out-of
band via a null-modem cable. (See Appendix B for wiring options.)
The switch provides a wide range of advanced performance-enhancing
features. Port-based and tagged VLANs, plus support for automatic
GVRP VLAN registration and IGMP multicast filtering provide traffic
security and efficient use of network bandwidth. QoS priority queueing
ensures the minimum delay for moving real-time multimedia data across
the network. Flow control eliminates the loss of packets due to bottlenecks
caused by port saturation. Broadcast storm control prevents broadcast
traffic storms from engulfing the network.
features. Port-based and tagged VLANs, plus support for automatic
GVRP VLAN registration and IGMP multicast filtering provide traffic
security and efficient use of network bandwidth. QoS priority queueing
ensures the minimum delay for moving real-time multimedia data across
the network. Flow control eliminates the loss of packets due to bottlenecks
caused by port saturation. Broadcast storm control prevents broadcast
traffic storms from engulfing the network.
For a detailed description of the switch’s advanced features, refer to the
Foundry EdgeIron User Guide..
Foundry EdgeIron User Guide..