A. Command Line InterfaceA-6 May 2001 6371-A2-GB20-20Interface and Service Domain IP Address Commandsifn address {eth1[:ifn] | dsl1[:ifn] }ip-address mask [primary]ifn {dsl1[:ifn] | eth1[:ifn] } primaryifn address dsl1 unnumbereddelete {dsl1[:ifn] | eth1[:ifn] }Minimum Access Level: AdministratorCommand Mode: ConfigSpecifies the IP address associated with either the Ethernet or DSL interface.Examples: ifn address dsl1 135.300.41.8 255.255.255.0ifn dsl1 primaryUp to four (4) IP addresses can be assigned on each interface. An interface address andmask cannot be changed while there is a static route (upstream or downstream) that usesit. Interface IP address ranges must not overlap.eth1, eth1:1, eth1:2, eth1:3, eth1:4 – Ethernet interface (eth1 is the same as eth1:1).dsl1, dsl1:1, dsl1:2, dsl1:3, dsl1:4 – DSL interface (dsl1 is the same as dsl1:1).ip-address – The IP address associated with the specified interface.mask – The subnet mask associated with the specified IP address.primary – The Primary designation of a numbered interface marks that interface as theone whose IP address will be used as the Router ID. (The Router ID is important when theDSL interface is unnumbered.) If no interface is defined as Primary, the last numberedinterface created will become the Primary IP Address.unnumbered – Specifies that the DSL interface is to be unnumbered.NOTES:– For each defined Ethernet interface, a corresponding upstream next hop router IPaddress must be configured for routing of packets received on that interface. Seeiproute create upstream eth1[:ifn] next-hop-ip on page A-7 for more details.– When the eth1 is assigned an IP address, this section also defines the logicalnetwork (subnet) containing the locally attached hosts. An IP route table entry willautomatically be created to correspond to the subnet defined by the mask.– When the DSL interface is numbered, multiple logical Ethernet interfaces can beassigned to the same DSL logical interface by configuring the same upstream nexthop router.– The configured DSL logical interfaces must be either all numbered or a singleunnumbered interface.– When NAT is being used, the DSL interface must be numbered.– When NAT, DHCP Server, or DHCP Relay is enabled, there can be only one servicedomain configured. Only one logical interface must be defined for each physicalinterface, i.e., one IP address to each interface.