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Reference Guide for the Centillion 50/100 and Model 5000BH Switches
1-46
893-01006-C
This configuration still allows the entire environment to be bridged; however,
some forwarding is done via intermediate switches along the path. In Figure 1-23,
several of the switches are configured to belong to more than one Circuit Saver
LAN.
Up to 16 Circuit Saver virtual ports (sets of ATM circuits) can be configured on a
single switch. The switch can bridge between a GIGArray LAN and multiple
Circuit Saver LANs.
Using Centillion GIGArray Switching
A switch becomes part of a GIGArray when the user creates a CLC on that switch
and then configures a PVP to each of the other CLCs in the GIGArray. When
configuring the client as the end point of one of these PVPs, the user is required to
enter a nonzero virtual port identifier (VPI) value (between 1 and 255). In
addition, the user can optionally enter a virtual circuit identifier (VCI) value,
which specifies the starting value of the automatically assigned VCIs within that
PVP.
To configure a set of CLCs (on different switches) to be part of the same
GIGArray (connects to the same GIGArray LAN), a full mesh of PVPs must be
set up among them. Between any two switches in the same GIGArray, at least one
point-to-point PVP (with a nonzero VPI) must be set up. Multiple PVPs can be
configured between any two switches for redundancy and load sharing purposes.
Virtual circuits within the PVP are set up automatically between switches in the
same GIGArray.
Note:
The requirement for a “full mesh” of connections within a GIGArray
does not imply that the participating switches need to be connected together in
a full mesh of physical links. The full mesh requirement refers only to PVPs,
which can be switched transparently through other switches between end
points.