Users Guide

Table Of Contents
Authentication, Authorization, and Accounting 357
Is Captive Portal Dependent on Any Other Feature?
If security procedures require RADIUS authentication, the administrator
must configure the RADIUS server information on the switch (see "Using
RADIUS" on page 269). The RADIUS administrator must also configure the
RADIUS attributes for CP users on the RADIUS server. For information
about the RADIUS attributes to configure, see Table 9-15.
For a list of RADIUS attributes that the switch supports, see "Which
RADIUS Attributes Does the Switch Support?" on page 271.
To support redirection of user entered URLs from a web browser, a DNS
server must be configured in the network. If routing is enabled on the switch,
IP helper should be enabled to allow hosts to obtain an IP address via DHCP.
A DHCP server must be available if it is expected that hosts will obtain IP
addresses dynamically. In addition, if routing is enabled, DHCP relay must be
configured.
The only type of interface where CP can be enabled is a physical port. CP is
not supported on multi-access VLANs or on LAGs.
A physical port’s VLAN membership does not affect CP. A physical port
enabled for CP can be a member of any VLAN or multiple VLANs, which can
be switching or routing VLANs.
A port enabled for CP may be directly connected to a single client (e.g., an
access switch), or the port may serve many clients (e.g., a port on an
aggregation switch).
Port security and CP cannot both be enabled on the same interface.
If a physical port configured with CP is made a member of a LAG, CP is
disabled on the port.
Dell EMC Networking does not support configuring spanning tree on a CP
port. BPDUs received on a port enabled for CP will not receive their normal
prioritization.
CP can coexist on an interface with DHCP snooping and Dynamic ARP
Inspection (DAI).
The administrator can configure the switch to send SNMP trap messages to
any enabled SNMP Trap Receivers for several CP events, such as when a CP
user has an authentication failure or when a CP user successfully connects to