Traffic Prioritization; Configuration Backup And Restore; Network Planning - Nortel BES50GE-12T PWR User Manual

134 BES50 fundamentals
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Traffic prioritization
The switch prioritizes each packet based on the required level of service
by using four priority queues with strict or Weighted Round Robin queuing.
It uses IEEE 802.1p and 802.1Q tags to prioritize incoming traffic based
on input from the end-station application. These functions can be used to
provide independent priorities for delay-sensitive data and best-effort data.
The switch also supports several common methods of prioritizing Layer 3/4
traffic to meet application requirements. Traffic can be prioritized based on
the priority bits in the IP frame Type of Service (ToS) octet or the number
of the TCP/UDP port. When these services are enabled, the priorities are
mapped to a Class of Service value by the switch, and then the traffic is sent
to the corresponding output queue.
Configuration backup and restore
You can save the current configuration settings to a file on a TFTP server
and later download this file to restore the switch configuration settings.

Network planning

A network switch allows simultaneous transmission of multiple packets
through noncrossbar switching. This means that it can partition a network
more efficiently than bridges or routers. The switch is one of the most
important building blocks in networking technology.
When performance bottlenecks are caused by congestion at the network
access point (such as the network card for a high-volume file server), the
device experiencing congestion (server, power user, or hub) can be attached
directly to a switched port. And, by using full-duplex mode, the bandwidth of
the dedicated segment can be doubled to maximize throughput.
When networks are based on repeater (hub) technology, the distance
between end stations is limited by a maximum hop count. However, a switch
turns the hop count back to zero. Subdividing the network into smaller and
more manageable segments, and linking them to the larger network by
means of a switch, removes this limitation.
A switch can be easily configured in any network to significantly boost
bandwidth while using conventional cabling and network cards.
Copyright © 2006, Nortel Networks
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Provide data security by restricting all traffic to the originating VLAN,
except where a connection is permitted through an external router.
Use private VLANs to restrict traffic to pass only between data ports
and the uplink ports, thereby isolating adjacent ports within the same
VLAN and allowing you to limit the total number of VLANs that need to
be configured.
Using the Nortel Business Ethernet Switch 50 Series
NN47924-301 01.01 Standard
1.00 October 2006
SMB
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