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 Mobile Groups
Page 19-5
Mobile Groups
Switch ports can be dynamically assigned to mobile groups through AutoTracker policies. 
Support for dynamic port assignment is one of the main differences between mobile groups 
and non-mobile groups. AutoTracker rules are assigned directly to a mobile group. In 
contrast, AutoTracker rules are assigned to the VLANs within a non-mobile group. No 
AutoTracker VLANs are contained within a mobile Group, and each mobile group constitutes 
a single spanning tree.
A switch port can belong to multiple mobile groups, whereas a switch port can belong to 
only one non-mobile group. However, a port can not belong to a mobile and a non-mobile 
group at the same time. 
Ports can be assigned to mobile groups either statically or dynamically. A port is statically 
assigned to a mobile group when one of the following occurs:
• Port by default assigned to default group 1
• Port assigned to a group through 
crgp
 or 
addvp
 commands
Although switch ports can belong to multiple mobile groups, it is not possible to assign a port 
to two different groups using the 
addvp
 command. However, a switch port could be assigned 
to one mobile group via the 
addvp
 command and then gain membership to another mobile 
group by matching the policy criteria for that group.
A switch port is dynamically assigned to a mobile group after one of its attached devices 
matches an AutoTracker policy for that mobile group. An overview of how ports and devices 
are dynamically assigned to mobile Groups can be found in How Ports Are Assigned to Groups 
on page 19-2.
Authenticated Groups
Mobile groups provide the added flexibility of user-authentication policies. Using Authentica-
tion Management Console (
AMC
) software, you can configure mobile groups to use log-in 
procedures as a means of assigning group membership. Mobile groups that use authentica-
tion are a special group type called an Authenticated Group. Authenticated Groups are 
described in more detail in the Switch Network Services User Manual.
Configuring Mobile Groups
You configure mobile Groups through the 
crgp
 command. During the 
crgp
 procedure you 
will receive a prompt asking if you want to create a mobile Group
Enable Group Mobility on this Group ? [y/n] (n):
You must answer 
Yes
 to this prompt to set up a mobile group. After this question, you will be 
asked to configure virtual ports and AutoTracker policies for the Group. Documentation for 
the full 
crgp