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xStack DES-6500 Modular Layer 3 Chassis Ethernet Switch CLI Manual
17
IP COMMANDS (INCLUDING MULTIPLE IP INTERFACES PER
VLAN)
Multiple IP interfaces per VLAN is a function that allows multiple IP interfaces to be assigned to the same VLAN. 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. Multiple IP interfaces per VLAN is a function that enables the Switch to be 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 multiple IP interfaces per VLAN, 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 be five interfaces per VLAN (one primary, and up to four secondary) 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 multiple interfaces for a specified VLAN (primary and secondary), that set IP interface cannot be changed to another
VLAN.
Multiple IP interfaces per VLAN is a valuable tool for network administrators requiring a multitude of IP addresses, but
configuring the Switch for Multiple IP interfaces per VLAN may cause troubleshooting and bandwidth problems, and should
not be used as a long term solution. Problems may include:
The Switch may use extra resources to process packets for multiple IP interfaces.
The amount of broadcast data, such as RIP update packets and PIM hello packets, will be increased.
The IP interface 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 [enabled | disabled]}
config ipif <ipif_name 12> [{ ipaddress <network_address> | vlan
<vlan_name 32> | state [enabled | disabled]} | bootp | dhcp]
enable ipif {<ipif_name 12> | all}
{<ipif_name 12> | all}
delete ipif {<ipif_name 12> | all}
show ipif {<ipif_name 12>}
disable ipif
Each command is listed, in detail, in the following sections.
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 [enabled | disabled]}
This command will create an IP interface.
<ipif_name 12> − The name for the IP interface to be created. The
user may enter an alphanumeric string of up to 12 characters to
define the IP interface.
<network_address> − IP address and netmask of the IP interface
Description
Parameters
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