Unnumbered Ip Examples - Avaya G250 Administration

Configuring the router
Routes discovered on an unnumbered interface by the RIP and OSPF routing protocols are
displayed as "via routes" in the routing table. The next-hop is listed as "via" the IP unnumbered
interface instead of the source address of the routing update.
To configure unnumbered IP on an interface:
1. Decide which interface from which to borrow the IP address. If necessary, configure the
interface. You can use the show interfaces command to display existing interface
configuration.
2. Enter the context of the interface on which you want to configure an unnumbered IP
address (usually the Dialer interface).
3. Use the ip unnumbered command, specifying the interface from which to borrow the IP
address.

Unnumbered IP examples

In the following example, a VLAN interface is configured, and then the Dialer interface is
configured with an unnumbered IP address, borrowing the IP address from the VLAN interface.
//enter the context of vlan interface 1:
G250-001(super)# interface Vlan 1
//to configure the IP address of the vlan interface:
G250-001(super-if:Vlan 1)# ip address 180.0.0.1 255.255.255.0
G250-001(super-if:Vlan 1)# exit
G250-001# !
//enter the context of the Dialer interface:
G250-001(super)# interface dialer 1
G250-001(super-if:Dialer 1)# dialer string 1 3001
G250-001(super-if:Dialer 1)# dialer persistent delay 1
G250-001(super-if:Dialer 1)# dialer modem-interface USB-Modem
//to configure IP unnumbered on the Dialer interface, borrowing the IP address
from vlan interface 1, configured above:
G250-001(super-if:Dialer 1)# ip unnumbered 1 Vlan 1
G250-001(super-if:Dialer 1)# exit
G250-001(super)# !
316 Administration for the Avaya G250 and Avaya G350 Media Gateways