User guide

IP TCP/IP command reference
iMG/RG Software Reference Manual (IPNetwork Functions)
4-8
The secondary addresses share the same subnet with the interface.
Secondary addresses therefore allow the IP stack to have more than one address on the same subnet. After
setting the main interface address, one or more additional addresses on the same subnet can be added to the
interface.
4.1.7.1 Configuring secondary IP addresses
You can create and configure secondary IP addresses using the CLI.
The following CLI commands allow you to create and configure secondary IP addresses:
ip interface add secondaryipaddress
ip interface clear secondaryipaddresses
ip interface delete secondaryipaddress
ip interface list secondaryipaddresses
Note: FThe ability to specify a subnet mask with a secondary address is superseded by the functionality of
virtual interfaces. You should use virtual interfaces instead.
Support for adding secondary IP addresses including subnet mask specification will be withdrawn in a future
software release.
4.1.7.2 Functionality of secondary IP addresses
On Ethernet interfaces, secondary IP addresses must be on the same subnet as the interface. Secondary
addresses may be added to virtual interfaces, as well as real interfaces.
On Point-to-Point links, secondary addresses may be added on a different subnet to the main interface address.
This will provide an additional address that the IP stack will respond to for traffic arriving on that interface, but
with no associated local subnet.
This is similar to configuring a virtual interface as an unnumbered interface. This is not a common configuration.
4.1.8 TCP/IP command reference
This section describes the commands available on AT-iMG models to manage the TCP/IP module.
4.1.8.1 IP Tracing commands
You can carry out tracing in the IP stack using the following system commands:
• SYSTEM LOG ENABLE|DISABLE; enables/disables the tracing support output for a specific module and cat-
egory.
• SYSTEM LOG LIST; displays the tracing options for the modules available in the current image