Configuring and managing IP interfaces and services 123Nortel WLAN—Security Switch 2300 Series Configuration GuideConfiguring and managing IP interfacesMany features, including the following, require an IP interface on the WSS:• Management access through Telnet• Access by WLAN Management Software• Exchanging information and user data with other WSS switches in a Mobility DomainIP interfaces are associated with VLANs. At least one VLAN on a WSS must have an IP interface to provide manage-ment access. Optionally, the other VLANs configured on the switch also can each have an IP interface. Each IP interfacemust belong to a unique, nonoverlapping IP subnet.Adding an IP interfaceYou can add an IP interface to a VLAN by statically configuring an IP address or by enabling the Dynamic Host Config-uration Protocol (DHCP) client on the VLAN.Statically configuring an IP interfaceTo add an IP interface to a VLAN, use the following command:set interface vlan-id ip {ip-addr mask | ip-addr/mask-length}Enabling the DHCP clientThe WSS Software DHCP client enables a WSS to obtain its IP configuration from a DHCP server. A switch can use theDHCP client to obtain the following configuration information:• IP address• Default router (gateway)• DNS domain name• DNS server IP addressThe DHCP client is implemented according to “RFC 2131: Dynamic Host Configuration Protocol” and “RFC 2132:DHCP Options and BOOTP Vendor Extensions”. The client supports the following options:• (12) Host Name (the WSS system name)• (55) Parameter request list, consisting of (1) Subnet Mask, (3) Router, (15) Domain Name, and (6) Domain NameServer• (60) Vendor Class Identifier, set to NRTL x.x.x, where x.x.x is the WSS Software versionThe DHCP client is enabled by default on an unconfigured 2350 when the factory reset switch is pressed and held duringpower on. The DHCP client is disabled by default on all other switch models, and is disabled on an 2350 if the switch isalready configured or the factory reset switch is not pressed and held during power on.You can enable the DHCP client on one VLAN only.WSS Software also has a configurable DHCP server. (See “DHCP server” (page 705).) You can configure a DHCPclient and DHCP server on the same VLAN, but only the client or the server can be enabled. The DHCP client andDHCP server cannot both be enabled on the same VLAN at the same time.
