Allied Telesis AT-S63 - Manual (Page 92)

Chapter 4: Enhanced Stacking
92 Section I: Basic Operations
the interface must be assigned to the common subnet that interconnects
the switches of the stack. Furthermore, the interface must be designated
as the switch’s local interface. The act of designating an interface as the
local interface tells the switch which interface and which subnet it should
use for the enhanced stacking feature.
For background information on the IPv4 routing feature, refer to the latest
version of the AT-S63 Management Software Command Line Interface
User’s Guide. To configure routing interfaces using the menus interface,
refer to Chapter 29, “Internet Protocol Version 4 Routing Interfaces” on
page 695 in this guide.
Slave Switches
The slave switches of an enhanced stack must be connected to the
master switch through a common VLAN. A slave switch can be connected
indirectly to the master switch so long as there is an uninterrupted path of
the common VLAN from the slave switch to the master switch.
A slave switch does not need a routing interface on the common VLAN if
you use the Default_VLAN (VID 1) as the common VLAN. A routing
interface in the common VLAN is required if you use any other VLAN other
than the Default_VLAN as the common VLAN of the switches in the stack.
The routing interface in the common VLAN on a slave switch does not
have to be designated as the local interface. The only circumstance in
which you might want to designate a local interface on a slave switch is if
you want to be able to remotely manage the device independently of the
stack. However, for the switch to remain part of an enhanced stack, the
interface designated as the local interface must be in the common VLAN.
For further information on remote management, refer to “Planning for
Remote Management” on page 49.
Enhanced
Stacking
Compatibility
This version of enhanced stacking is compatible with earlier AT-S63
versions and the enhanced stacking feature in the AT-8000 Series,
AT-8400 Series, and AT-8500 Series switches. As such, an enhanced
stack can consist of various switch models, though the following issues
need to be considered when building this type of enhanced stack:
ˆ The management VLAN of an AT-8000 Series, AT-8400 Series, or
AT-8500 Series switch must be assigned to the common VLAN that
interconnects the switches of the stack. For instructions on how to
select the management VLAN on an AT-8000 Series, AT-8400 Series,
or AT-8500 Series switch, refer to the appropriate user’s guide.
ˆ Though the master switch of an enhanced stack can be any switch that
supports this feature, Allied Telesyn recommends choosing an
AT-9400 Series switch to perform that role. To use an AT-8000 Series,
AT-8400 Series, or AT-8500 Series switch as the master switch, you
must assign it an IP address that is part of the same common subnet
that interconnects the switches of the stack. For instructions on how to