Chapter 3: Icx7250 Stack; Technical Architecture - Brocade Communications Systems ICX 7450 Deployment Manual

Brocade ICX7750 recommendations and restrictions
1. Only ports recognized as default ports can be used as stacking ports. Before a unit can use no
default stacking ports, the default-ports command must be configured on the local console for the
unit so the unit can be discovered by the secure-setup utility used to form a stack.
2. Default ports cannot be changed on a live stack. The following example shows the error message
displayed if you attempt to do so
ICX7750-48F Router# configure terminal
ICX7750-48F Router#(config)# stack unit 8
ICX7750-48F Router# (config-unit-8)# default-ports 8/3/1 8/3/4
New default-ports 8/3/1 8/3/4 result in removing both old stack ports. Abort
3. Combining module 2 and module 3 connections in the same stack is not allowed. The following error
message is displayed when modules have been incorrectly combined. Refer to Supported
Topologies.
*** Warning! Some units in the stack have module 2 to module 3 connections. The
stack
may not work. Please refer to documentation for more details. Ref: table.
4. In case of any wrong stack trunk connections, secure setup will not be performed. An invalid stack
trunk message or no new units discovered messages will be displayed.
5. Secure setup will not be performed if the setup as loops.
ICX7750-48F Router# stack secure
CPU utilization too high: 81 percent. Check loops in the network and try again...
6. The Boot up time for a 12 unit Sidewinder Stack is less than 90 seconds approximately. For the stack
to boot up, assign a standby and get protocols ready so it can be ready for failover, which takes less
than 3 minutes.
7. In case of any image mismatch on member units, active unit will trigger Autocopy. Autocopy is
supported only between minor and patch releases and not between major releases.
8. When a 40G uplink port is being converted to stacking ports, the uplink configuration should be
removed before it can be configured as a stack port.

Chapter 3: ICX7250 Stack

Technical Architecture

The Brocade ICX 7250 is expected to meet various customer deployment needs so there will be five
SKUs based on port density, PoE capability and port type.
The SKU types are as follows:
• ICX7250-24G
• ICX7250-24
• ICX7250-24P
• ICX7250-48
• ICX7250-48P
ICX 7250-24G
This hardware unit has 24-Port RJ45 10/100/1000Mbps Ethernet port platform with EEE. In addition it
has one fixed module providing 4x1F SFP uplink ports. The ICX7250-24G is not stackable.
Brocade ICX 7450, Brocade ICX 7750, and Brocade ICX 7250 Stacking Deployment Guide
53-1003581-03
Brocade ICX7750 recommendations and restrictions
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