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DGS-3130 Series Layer 3 Stackable Managed Switch Hardware Installation Guide
Switch Stacking
The DGS-3130 series supports stacking up to 9 switches together while being managed through one console
connection on the master switch, or by an IP address through the MGMT port, or by multiple IP addresses through
any of the RJ45/SFP/SFP+ ports using Telnet, the Web UI, and SNMP. This cost-effective switch provides an
affordable solution for administrators to upgrade their networks using the combo RJ45/SFP+ ports to scale and stack
the Switches. This increases overall reliability, serviceability, and availability.
•
Duplex Chain – The Duplex Chain topology stacks switches together in a chain-link format. Using this
method, data transfer is only possible in one direction. If there is a break in the chain, then data transfer will
be affected.
•
Duplex Ring – The Duplex Ring stacks switches in a ring or circle format where data can be transferred in
two directions. This topology is very resilient due to the fact that, if there is a break in the ring, data can still be
transferred through the stacking cables between switches in the stack using the alternate path.
Switches in the series can be physically stacked using RJ45 cables, optical fiber cables connected to SFP+
transceivers, or Direct Attached Cables (DAC) with SFP+ connectors. Only the last 6 ports on the Switch can be used
for physical stacking.
Physical stacking needs to be enabled and can be configured to support either a 2-port or a 4-port stacking
configuration. When the 2-port stacking configuration is used, a full-duplex speed of up to 40Gbps will be used
between two switches. When the 4-port stacking configuration is used, a full-duplex speed of up to 80Gbps will be
used between two switches.
•
Stacking Cost – Physical stacking number in a stack is limited by stacking cost or maximum stacking device
number. In DGS-3130 series, the total stacking cost is 12 and the maximum stacking device number is 9.
DGS-3130-30TS/30S/30PS model consumes one stacking cost and DGS-3130-54TS/54S/54PS consumes
two stacking costs in a stack. Therefore, if the stack is constructed of DGS-3130-30TS/30S/30PS series, the
maximum stacking number is 9 devices per stack. If the stack is constructed of DGS-3130-54TS/54S/54PS
series, the maximum stacking number is 6 devices per stack due to stacking cost of DGS-3130-
54TS/54S/54PS is two. If the stack is constructed of DGS-3130-30TS/30S/30PS and DGS-3130-
54TS/54S/54PS series, the stacking number is limited by stacking cost and maximum stacking number of 9.
For some stacking combinations, please refer to the table below.
Combination
DGS-3130-30TS/30S/30PS
1
2
3
4
5
6
7
Figure 4-2 Connecting the Switch to another switch/hub
Device Number
9
8
7
6
5
4
3
DGS-3130-54TS/54S/54PS
Device Number
0
1
2
3
3
4
4
40
Stacking Number
Stacking Cost
9
9
9
9
8
8
7
9
10
11
12
11
12
11
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