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Reference Guide for the Centillion 50/100 and Model 5000BH Switches
1-44
893-01006-C
Using CLC Mode of ATM Switching
This section describes how virtual ports can be configured into logical LANs in
the ATM network to suit particular performance and connectivity objectives.
As described earlier, a Centillion LAN client (CLC) can be configured for either
the Turbo or Circuit Saver forwarding method. When CLCs using Turbo mode are
connected (using PVPs), they automatically form a GIGArray LAN to the ATM
network. When CLCs using Circuit Saver mode are connected (using PVCs), they
automatically form a CLC Circuit Saver LAN.
Table 1-2
summarizes the differences between the two types of switching.
The following sections provide examples of Circuit Saver and Turbo switching.
Using CLC Circuit Saver Switching
Direct Circuit Saver switching over ATM between two switches is provided when
those switches are configured in the same Circuit Saver LAN. Configuring a
single switch to participate in more than one Circuit Saver LAN provides
flexibility in the trade-off between performance (all switches on the same Circuit
Saver LAN—requires more circuits) and configuration ease (switches configured
in multiple Circuit Saver networks—requires fewer circuits). The following two
figures illustrate this trade-off.
Table 1-2. CLC Circuit Saver versus Turbo
Features Circuit Saver Turbo
Performance Hi
g
h Very hi
g
h
Circuit connections Virtual circuits Virtual paths
Redundancy Supported Supported
Load sharin
g
Supported Supported