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Chapter 10: Building Stacks with Multi-Gigabit Copper Ports
Introduction
128
As explained in "Stack Trunks" on page 46, the switches of a stack are
connected by a physical link of two ports on each unit. There are two ways
to build the trunk on GS970EMX Switches. One way is with the SFP+
ports S1 and S2, the default trunk ports. Those ports have the advantage
of supporting short and long distance fiber optic transceivers, making it
possible to build stacks of switches over large distances. For directions,
refer to Chapter 9, "Building Stacks with SFP+ Ports S1 and S2" on page
117.
When the switches are physically close to each other, such as in the same
building or equipment rack, you can use the Multi-Gigabit copper ports for
the trunk instead, and reserve the SFP+ ports for other functions. As
explained in this chapter, using the Multi-Gigabit copper ports as the trunk
requires configuring the individual switches before building the stack. Here
are the main steps:
1. Filling in the "VCStack Worksheet" on page 60.
2. Reviewing "Command Summary" on page 129.
3. "Configuring the Master Switch" on page 133.
4. "Configuring Member Switches" on page 141.
5. "Powering On the Stack" on page 148
6. "Verifying the Stack and Assigning Priority Numbers" on page 123
Review the following information before performing the instructions:
The procedures should be performed in the order presented here.
The master switch can be any GS970EMX Switch, except the
GS970EMX/10 Switch, which does not support the VCStack
feature. Refer to "Master and Member Switches" on page 54.
If network cables are connected to the Multi-Gigabit copper ports,
disconnect them before continuing. You should configure the
switches before cabling the trunk ports.
Note
Cabling the ports of the stack trunk before configuring the switches
may result in loops in your network topology, which can cause poor
network performance.
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