Summary of loopback interface configuration

Summary of loopback interface configuration:

  • You can configure a loopback interface only from the CLI; you cannot configure a loopback interface from the WebAgent or Menu interface.

  • Loopback interfaces share the same IP address space with VLAN configurations. The maximum number of IP addresses supported on a switch is 2048, which includes all IP addresses configured for both VLANs and loopback interfaces (except for the default loopback IP address 127.0.0.1).

  • Each IP address that you configure on a loopback interface must be unique in the switch. This means that the address cannot be used by a VLAN interface or another loopback interface.

  • 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 32 IP addresses are supported on a loopback interface.