Brocade Mobility RFS Controller System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 526)

514 Brocade Mobility RFS Controller System Reference Guide
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FIGURE 90 Profile Services screen
5. Refer to the Captive Portal Hosting section to select or set a guest access configuration
(captive portal) for use with this profile.
A captive portal is guest access policy for providing guests temporary and restrictive access to
the network.
A captive portal provides secure authenticated access using a standard Web browser. Captive
portals provide authenticated access by capturing and re-directing a wireless user's Web
browser session to a captive portal login page where the user must enter valid credentials to
access to the network. Once logged into the captive portal, additional Agreement, Welcome
and Fail pages provide the administrator with a number of options on screen flow and user
appearance.
Either select an existing captive portal policy, use the default captive portal policy or select the
Create link to create a new captive portal that can be applied to the profile. For morel
information, see,
Configuring Captive Portal Policies .
6. Use the DHCP Server Policy drop-down menu assign this profile a DHCP server policy. If an
existing DHCP policy does not meet the profile’s requirements, select the Create button to
create a new policy configuration that can be applied to this profile.
Dynamic Host Configuration Protocol (DHCP) allows hosts on an IP network to request and be
assigned IP addresses as well as discover information about the network where they reside.
Each subnet can be configured with its own address pool. Whenever a DHCP client requests an
IP address, the DHCP server assigns an IP address from that subnet’s address pool. When the
onboard DHCP server allocates an address for a DHCP client, the client is assigned a lease,
which expires after an pre-determined interval. Before a lease expires, wireless clients (to
which leases are assigned) are expected to renew them to continue to use the addresses.
Once the lease expires, the client is no longer permitted to use the leased IP address. The
profile’s DHCP server policy ensures all IP addresses are unique, and no IP address is assigned
to a second client while the first client's assignment is valid (its lease has not expired).