Allied Telesis AT-S63 - Manual (Page 548)

Chapter 32: Internet Protocol Version 4 Packet Routing
548 Section VII: Internet Protocol Routing
Here are several other items to note concerning routing interfaces on an
AT-9400 Series switch:
ˆ The switch can support up to 512 interfaces at one time, which means
it can route the IPv4 traffic on up to 512 local subnets and networks.
ˆ A single VLAN on a switch can contain up to sixteen interfaces.
ˆ The AT-9408LC/SP, AT-9424T/GB, and AT-9424T/SP switches do not
support the IPv4 packet routing feature. However, you can create one
routing interface on the switches to support those management
functions that require the device to have an IP address. For more
information, refer to “Routing Interfaces and Management Features”
on page 557 and “AT-9408LC/SP AT-9424T/GB, and AT-9424T/SP
Switches” on page 560.
ˆ The commands for managing interfaces are “ADD IP INTERFACE” on
page 570, “DELETE IP INTERFACE” on page 577, and “SET IP
INTERFACE” on page 583.
Note
Routing interfaces can be configured from either the command line
interface or the menus interface.
The following subsections describe the three main components of a
routing interface:
ˆ VLAN ID (VID)
ˆ Interface number
ˆ IP address and subnet mask
VLAN ID (VID)
An interface must be assigned to the VLAN on the switch where its
network or subnet resides. The VLAN is identified by its VLAN
identification (VID) number. The sequence of operations is to create the
VLAN first and then the routing interface. Creating the interface before the
VLAN is not permitted. For background information on VID numbers, refer
to the AT-S63 Management Software Menus Interface User’s Guide.
A VLAN can have more than one interface in circumstances where a
virtual LAN contains more than one subnet. The maximum number is
sixteen routing interfaces per VLAN, making sixteen the maximum number
of subnets you can have in an VLAN and still support packet routing on all
of them.