Figure 47-1
XRN networking
Establishment of an XRN Fabric
Topology and connections of an XRN fabric
An XRN fabric typically has a daisy chain topology structure. As shown in
Figure 47-2
, each switch has
two ports connected with two other switches in the fabric, but the switches at both ends of the daisy
chain have only one port connected. These ports are called fabric ports in general, a left port and a right
port respectively; the other ports, which are available for connections with users or devices outside the
fabric, are called user ports.
Figure 47-2
A schematic diagram of an XRN fabric
A correctly built XRN fabric features the following:
z
Multiple Switch 4500 series switches are interconnected through their fabric ports.
z
Given a switch, its left port is connected to the right port of another switch, and its right port is
connected to the left port of a third one.
Port connection mode for Switch 4500 series daisy chain topology XRN fabric is shown in
Figure 47-3
.
47-2
