Omni Switch/Router Distributed Switching Fabric
Page 1-3
Omni Switch/Router Distributed Switching Fabric
Many switches in the market employ a shared memory architecture, which uses a central
switching engine to send data to the appropriate port. As shown in the figure below, data
enters the input port (
➊
below), crosses the switching fabric on its way to the central switch-
ing engine(
➋
below), and
again
crosses the switching fabric (
➌
below) before exiting the
appropriate output port (
❹
below).
Traditional Shared Memory Architecture
In contrast, Omni Switch/Router switches use a distributed switching fabric. As shown in the
figure below, data enters the input port and crosses the switching fabric
only once
before
exiting the appropriate output port. Compared to the shared memory architecture, only half
as much bandwidth is required since data just crosses the switching fabric once.
Omni Switch/Router Distributed Switching Fabric
Switch Fabric
Central Switching Engine
I/O Port
I/O Port
Note: Unlike distributed switch
fabric, data is forced to cross
switch fabric twice.
➊
➋
➌
❹
Switch Fabric
I/O Port
I/O Port
Summary of Contents for Omni Switch/Router
Page 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Page 4: ...page iv ...
Page 110: ...WAN Modules Page 3 40 ...
Page 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Page 164: ...Using ZMODEM Page 5 8 ...
Page 186: ...Displaying and Setting the Swap State Page 6 22 ...
Page 202: ...Creating a New File System Page 7 16 ...
Page 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Page 430: ...OmniChannel Page 15 16 ...
Page 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Page 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Page 646: ...Application Example DHCP Policies Page 20 30 ...
Page 660: ...GMAP Page 21 14 ...
Page 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Page 722: ...Application Example 5 Page 24 12 ...
Page 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Page 872: ...The WAN Port Software Menu Page 28 46 ...
Page 960: ...Deleting a PPP Entity Page 30 22 ...
Page 978: ...Displaying Link Status Page 31 18 ...
Page 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Page 1024: ...Backup Services Commands Page 34 14 ...
Page 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Page 1072: ...Configuring a Switch with an MPX Page A 10 ...
Page 1086: ...Page B 14 ...
Page 1100: ...Page I 14 Index ...