Rockwell ArmorStratix 5700 series, Instructions Manual

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Rockwell Automation Publication 1783-UM007F-EN-P - September 2016 225
Configure Switch Features Chapter 7
You can configure DHCP for ring devices on the Config DHCP tab in Device
Manager, as shown on
page 228 . Before you configure DHCP for ring devices,
you must enable DHCP and configure an IP address pool to use for the ring
devices, as described on
page 238 .
Once you configure DHCP for ring devices, the changes take effect when the
ring converges after the loss of a network connection. However, if you assign a
new IP address to a device currently in use, the new IP address does not take
effect until the device’s current address lease expires or until the device restarts.
Be aware that a mismatch between the number of configured devices and the
number of physical ring devices triggers an alarm. This mismatch can be a
result of a topology change or a configuration change.
Multiple Rings
Stratix 5400 switches support as many as three device-level rings with these
configuration rules:
• Ring ports function only as access ports.
• Multiple rings cannot share the same ring ports. Valid ring ports are
defined in Table 41 on page 215 .
• All ring ports within the same ring or belonging to different rings must
be assigned to the same access VLAN.
• The same Stratix 5400 switch must serve as the active gateway for all
rings.
• The same Stratix 5400 switch must serve as the backup gateway for all
rings.
Figure 20 shows an example of a Stratix 5400 switch configured for three rings.
Figure 20 - Stratix 5400 Switch with Multiple Rings
32650-M
Stratix 5400 Switch
VLAN 100
VLAN 100
VLAN 100