I wanted to take a moment to look at spanning tree. By default, ICX switches run 802.1d spanning tree on a per-vlan basis. Ideally, we want to use a protocol with faster convergence such as rapid spanning tree (802.1w). I will go through some general configuration steps and a few best practices. These configurations will not suit all customers, but it is a good starting point for many.
Enabling RSTP on vlan(s)
ICX#conf t ICX(config)#vlan 10 20 30 <--edits three vlans at once. You can edit vlans one at a time or using a range via the 'to' syntax (vlan 1 to 20) ICX(config-mvlan-10*30)#spanning-tree 802-1w
Now that 802.1w is running, we will want to set a root bridge priority. If no priority is defined, the default of 32768 will be used. Let us assume you want this switch to be the root bridge. A lower priority number wins, so let us go ahead and set it to zero to ensure this switch becomes root bridge: