Brocade Mobility RFS7000-GR Controller System Reference Guide (Supporting software release 4.1.0.0-040GR and later) - Manual (Page 297)

Brocade Mobility RFS7000-GR Controller System Reference Guide 283
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Layer 3 Mobility
5
• Data traffic for roamed MUs is tunneled between switches by encapsulating the entire Layer 2
packet inside GRE with a proprietary code-point.
• When MUs roam within the same VLAN (Layer 2 Roaming), the behavior is retained by
re-homing the MU to the new switch so extra hops are avoided while forwarding data traffic.
• MUs can be assigned IP addresses statically or dynamically.
• Forward and reverse data paths for traffic originating from and destined to MUs that have
roamed from one Layer 3 subnet to another are symmetric.
NOTE
When using Layer 3 Mobility ensure that TCP traffic on port 58788 is allowed on the network(s)
where mobile units will be roaming from and to.
To configure Layer 3 Mobility for the switch:
1. Select Services > Layer 3 Mobility from the main menu tree.
The Layer 3 Mobility screen appears with the Configuration tab displayed.
2. Select the Use Default Management Interface checkbox to use the switch’s default
management interface IP address for MUs roaming amongst different Layer 3 subnets. The IP
address displayed to the right of the checkbox is used by Layer 3 MU traffic.
3. If wanting to use a local IP addresses (non switch management interface) for MUs roaming
amongst different Layer 3 subnets, select the Use this Local Address checkbox and enter an IP
address.
4. Use the Roam Interval to define maximum length of time MUs within selected WLAN are
allowed to roam amongst different subnets.
5. Refer to the table of WLANs and select the checkboxes of those WLANs you wish to enable
Layer 3 mobility for.