Cabletron Systems SmartSTACK 10 ELS10-26, User Manual

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1-8
Introduction
network and when it is granted permission to transmit. In
addition, full store and forward switching ensures data integrity,
thus preventing network error conditions from being generated
throughout the network.
Discarding Local Traffic
The SmartSTACK 10 ELS10-26 checks all incoming packets for
their destination address against the Bridge Address Table. If a
packet’s destination address is not on the same network segment
as the originating packet, the SmartSTACK 10 ELS10-26 forwards
the packet to the network segment associated with that destination
address, if known. However, if the packet’s source and destination
address are on the same network segment, known as
local traffic ,
the packet is automatically discarded (i.e., ignored by the
SmartSTACK 10 ELS10-26).
For example, a file transmitted from Workstation A to Workstation
C in Figure 1-3 does not need to leave LAN 1. The SmartSTACK 10
ELS10-26 connected to LANs 1 and 2 sees all traffic from LAN 1,
including LAN 1 local traffic.
Figure 1-3. Typical Switching Application
LAN 1
LAN 2
A B C
FastNet 10
ELS10-26