Icx 7250 Stacking Configuration Notes - Arris Ruckus ICX 7850 Series Configuration Manual

Stacking by Device
ICX 7250 stack configuration overview
FIGURE 17 ICX 7250-24P ring stack
The following figure depicts a two-unit stack linear-topology trunk. All ICX 7250 models support this type of trunk, which
improves redundancy and bandwidth. For more information, refer to Support for two-unit stack linear-topology trunks on page
36.
FIGURE 18 ICX 7250-24P two-unit stack with linear-topology trunk

ICX 7250 stacking configuration notes

All ICX 7250 platforms except the ICX 7250-24G support stacking on 10-Gbps links. The ICX 7250 requires a license for ports to
operate at 10 Gbps. Otherwise, the ports support only 1 Gbps. These 1-Gbps ports do not support stacking.
If a port is configured to operate at 1 Gbps in the startup configuration, it would continue to operate at 1 Gbps after a license is
installed, unless it is re-configured to operate at 10 Gbps. Refer to Reconfiguring ICX 7250 1-Gbps ports as 10-Gbps ports on page
106. However, if no user configuration is present for the ports, they will automatically be configured as 10-Gbps ports when a
license is installed.
If an ICX 7250 stack is formed on licensed ports and the license is later removed, the stack breaks afer reload because the stack
ports return to 1-Gbps mode. To form the stack again, the license must be downloaded to each device.
Of the eight 10-Gbps SFP+ ports potentially available on the ICX 7250 as stacking or uplink ports, a maximum of four ports can be
used simultaneously for stacking. These ports can operate as separate ports, or they can be configured as two-port trunks. Refer
Ruckus FastIron Stacking Configuration Guide, 08.0.90
Part Number: 53-1005572-01 105