Configuring IP Addressing
Loopback Interfaces
For example, if you configure a VLAN with IP address 172.16.100.8/24, you
cannot configure a loopback interface with IP address 172.16.100.8. In the
same way, if you configure a loopback interface (lo1) with IP address
172.16.101.8, you cannot configure another loopback interface (lo2) with
IP address 172.16.101.8.
■ You can configure multiple IP addresses on a loopback interface (lo0 to
lo7). Up to thirty-two IP addresses are supported on a loopback interface.
The following example shows valid IP address configurations on two
loopback interfaces.
ProCurve(config)# interface loopback 0
ProCurve (lo0)# ip address 172.16.101.8
ProCurve (lo0)# ip address 172.16.101.9
ProCurve (lo0)# exit
ProCurve (config)# interface loopback 1
ProCurve (lo1)# ip address 172.16.102.1
ProCurve (lo1)# ip address 172.16.102.2
Displaying Loopback Interface Configurations
To display the list of loopback interfaces which have been assigned IP
addresses, enter the show ip command.
In the show ip command output, information about configured loopback
interfaces is displayed below other IP configuration parameters, such as
packet time-to-live (TTL) and ARP age-out values, and VLAN IP configura-
tions. The following example displays the IP addresses configured for two
user-defined loopback interfaces (lo1 and lo2).
8-18
