Dell PowerConnect J-EX4200-24T Software Manual page 795

Overview and Topology
Before you begin, be sure you have:
Confirmed that the existing Virtual Chassis configuration is operating correctly. See
"Example: Configuring a Virtual Chassis with a Master and Backup in a Single Wiring
Closet" on page 717.
A Virtual Chassis configuration can be expanded without disrupting the site's network
connectivity. This example describes adding a member switch to an existing Virtual
Chassis configuration to provide additional access ports for connecting more PCs and
VoIP phones at this location. You can continue to expand the Virtual Chassis configuration
with additional members in the same wiring closet, using the same procedure. If you want
to expand the Virtual Chassis configuration to include member switches in another wiring
closet, see "Example: Configuring a Virtual Chassis Interconnected Across Multiple Wiring
Closets" on page 733.
If you want to retain the roles of the existing master and backup switches, explicitly
configure the mastership priority of these switches, specifying the highest possible value
(255) for both the master and the backup.
During expansion, the existing Virtual Chassis configuration can remain powered on and
connected to the network. Before powering up the new switch, interconnect it to the
other the switches using the dedicated VCPs on the rear panel. Do not run the EZ Setup
program on the added member switch.
This example shows an existing Virtual Chassis configuration composed of two J-EX4200
switches. The Virtual Chassis configuration is being expanded to include a J-EX4200-24T
switch as a linecard member.
The topology for this example consists of:
One J-EX4200-48T switch (SWA-0) with 48 access ports, 8 of which support Power
over Ethernet (PoE)
Two J-EX4200-24T switch (SWA-1 and SWA-2) each with 24 access ports, including
8 ports that support PoE
One uplink module with two 10-gigabit ports is installed in the J-EX4200-48T switch.
These ports can be configured as trunk ports to connect to a distribution switch or
customer edge (CE) router or as Virtual Chassis ports (VCPs) to interconnect with a
member switch that is located too far for dedicated VCP cabling. (The uplink module
ports on the SFP and SFP+ uplink modules and the SFP network interfaces on the
J-EX4200-24F switches can also be used for these purposes.) For information on
configuring the uplink ports as trunk ports to a distribution switch, see "Configuring
Gigabit Ethernet Interfaces (CLI Procedure)" on page 919 or "Configuring Gigabit Ethernet
Interfaces (J-Web Procedure)" on page 909. For information on configuring uplink ports
as Virtual Chassis ports, see "Setting an Uplink Module Port as a Virtual Chassis Port
(CLI Procedure)" on page 792.
Table 103 on page 724 shows the configuration settings for the expanded Virtual Chassis.
Chapter 44: Virtual Chassis—Configuration Examples
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