Stacking; Unmanaged Switch Functions; Stacking Network Configuration; Stacking Formation / Stacking Port Number Determination - NEC UNIVERGE SV9100 Features And Specifications

Rate Limiting
Ingress Policer
Egress rate control
Stacking (SV9100 Chassis Only)
The idea of stacking allows the user the ability to manage multiple GSWU cards in one system as one
switch, instead of individual units and IP addresses, etc. For example, a set of three cards would appear
to the UI as a 24-port switch, instead of three 8-port switches.
Stacking will work by assigning a Master Management Card (or Main card), which will provide all the GUI
information for all cards in the same stack. The CCPU will assign the Main card by issuing an IP address
and configuring the Main Card assignment to the GSWU via data program. All other GSWU cards
detected in the system will not be assigned an IP address and will be configured as "Add-on", signifying
them as Add-on cards.
A PBX system can have up to 12 GSWU cards per system. However, only three GSWU units can be
grouped together to form a single 20-port switch. When more than three GSWU units are present within
a system, the units other than the three designated will not have any of the software features specified in
this document. They will behave as unmanaged Gigabit Ethernet switches.

Unmanaged Switch Functions

In the Unmanaged mode, a GSWU unit will have following functions only:
10/100/1000 Ethernet ports (x8)
PoE Class 1 (lowest power class)

Stacking Network Configuration

The GSWU Main board will maintain the network configuration and card initialization sequence. The
provision of IP address from the back plane will identify the Main board. If, during initialization, the IP
address is set to "0" by the CPU, then the card is determined to be an "Add-on" card.
The IP address for the GSWU will be assigned in program Program 10-55 on the SV9100. It contains
settings for IP Address, Subnet Mask and a gateway IP address.
Stacking Formation
When a GSWU determines that it is an "Add-on" by the configuration setting in Program 10-55-03, the
Add-on GSWU will send a broadcast message to all the GSWU units in the Chassis, until it receives an
acknowledge message from a Main board.
The Main board receiving this broadcast message will acknowledge by sending port identification
information to the Add-on board and a board type (i.e. Add-on 1, Add-on 2, etc.).
The board type will identify the Add-on board to system (Main GSWU) of its port assignments. A board
type of "Add-on 1" will be Ports 9~16. A board type of "Add-on 2" will be Ports 17~24. A GSWU that has
been designated as the "Main" board will always be assigned Ports 1~8.
Stacking Port Number Determination
When a Main board is initialized, it assigns the first eight ports as port 1 through 8. When subsequent
add-on boards' broadcast messages are received, the CCPU, by manual means or any other means,
will assign a Board Type to the Add-on card. This will automatically assign its port numbers.
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