DXS-3326GSR Stackable Gigabit Layer 3 Switch
17
IP MULTINETTING COMMANDS
IP Multinetting is a function that allows multiple IP interfaces to be assigned to the same subnet (or VLANs). This is
beneficial to the administrator when the number of IPs on the original interface is insufficient and the network administrator
wishes not to resize the interface. IP Multinetting is capable of assigning another IP interface on the same VLAN without
affecting the original stations or settings of the original interface.
Two types of interfaces are configured for IP multinetting, primary and secondary, and every IP interface must be
classified as one of these. A primary interface refers to the first interface created on a VLAN, with no exceptions. All other
interfaces created will be regarded as secondary only, and can only be created once a primary interface has been configured.
There may only be two interfaces per VLAN and they are, in most cases, independent of each other. Primary interfaces cannot
be deleted if the VLAN contains a secondary interface. Once the user creates two interfaces for a specified VLAN (primary and
secondary), that set IP interface cannot be changed to another VLAN. Both interfaces support all unicast and multicast routing
protocols but only the primary interface will support the BOOTP relay agent.
IP Multinetting is a valuable tool for network administrators requiring a multitude of IP addresses, but configuring the
Switch for IP multinetting may cause troubleshooting and bandwidth problems, and should not be used as a long term solution.
Problems may include:
Transmitting data within the same VLAN will need double the resources. (The same packet will be sent to two
different IP interfaces on the same VLAN).
The amount of broadcast data, such as RIP update packets and PIM hello packets, will be increased.
If the router fails, traffic within the VLAN will also fail.
The IP multinetting commands in the Command Line Interface (CLI) are listed (along with the appropriate parameters) in the
following table.
Command Parameters
create ipif <ipif_name 12> <network_address> <vlan_name 32> {secondary
| state [enable | disable]}
config ipif <ipif_name 12> [{ ipaddress <network_address> | vlan
<vlan_name 32> state [enable | disable]} | bootp | dhcp}]
enable ipif <ipif_name 12> | all
disable ipif <ipif_name 12> | all
delete ipif <ipif_name 12> | all
show ipif <ipif_name 12>
Each command is listed, in detail, in the following sections.
138
create ipif
Purpose Used to create an IP interface on the Switch.
Syntax
create ipif <ipif_name 12> <network_address> <vlan_name
32> {secondary | {state [enable | disable]}
Description This command will create an IP interface.
Parameters
<ipif_name 12> − The name for the IP interface to be created. The
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