Extreme Networks ExtremeWare 7.2e, Installation And User Manual

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Network Login
ExtremeWare 7.2e Installation and User Guide 159
DHCP Server on the Switch
A DHCP server with limited configuration capabilities is included in the switch to provide IP addresses
to clients. The DHCP server is not supported as a standalone feature. It is used only as part of the
Network Login feature.
DHCP is enabled on a per port, per VLAN basis. To enable or disable DHCP on a port in a VLAN, use
one of the following commands:
enable dhcp ports <portlist> vlan <vlan name>
disable dhcp ports <portlist> vlan <vlan name>
configure vlan <vlan name> netlogin-lease-timer <seconds>
The switch responds to DHCP requests for unauthenticated clients when DHCP parameters such as
dhcp-address-range
and
dhcp-options
are configured on the network login VLAN. The switch can
also answer DHCP requests after authentication if DHCP is enabled on the specified port. If you want
network login clients to obtain DHCP leases from an external DHCP server elsewhere on the network,
then do not enable DHCP on the switch ports.
Displaying DHCP Information
To display the DHCP configuration, including the DHCP range, DHCP lease timer, network login lease
timer, DHCP-enabled ports, IP address, MAC address, and time assigned to each end device, use the
following command:
show vlan <vlan name> dhcp-address-allocation
Displaying Network Login Settings
To display the network login settings, use the following command:
show netlogin {port <portlist> vlan <vlan name>}
Disabling Network Login
Network login must be disabled on a port before you can delete a VLAN that contains that port. To
disable network login, use the following command:
disable netlogin ports <portlist> vlan <vlan name>
Additional Configuration Details
This section discusses additional configuration like switch DNS name, default redirect page, session
refresh and logout-privilege. URL redirection requires the switch to be assigned a DNS name. The
default name is
network-access.net
. Any DNS query coming to the switch to resolve switch DNS
name in unauthenticated mode is resolved by the DNS server on the switch in terms of the interface (to
which the network login port is connected) IP-address.
To configure the network login base URL, use the following command:
configure netlogin base-url <url>