Allied Telesis X610-24SPS/X User Manual

x610 Series Layer 3 Gigabit Ethernet Switches Installation Guide

67

The proprietary high-speed communication protocol that is used over the 
stacking links requires multiple twisted pairs and a high level of shielding. 
This means that to stack x610 switches, specialized cables and 
connections are required.

The stacks are connected via the stacking ports on the VCStack stacking 
modules, which are installed in the back of each switch. There are two 
VCStack stacking modules available:



The AT-StackXG, which has two full-duplex, 12 Gbps stacking ports



The AT-x6EM/XS2, which has two 10 Gbps SFP+ stacking slots

The following cables are used to connect the stacking ports when using 

L/A 2

Off

Stack Port 2 has not established a link to a 
stacking port on another VCStack stacking 
module.

Solid 
Green

Stack Port 2 has established a link to a 
stacking port on another VCStack stacking 
module.

Flashing 
Green

Stack Port 2 has established a link to a 
stacking port on another VCStack stacking 
module and is sending or receiving packet 
traffic.

PRES

Off

The expansion slot for the VCStack stacking 
module is empty.

Solid 
Green

A VCStack stacking module is installed in the 
switch.

MASTER  Off

Indicates that the switch is not the Stack 
Master.

Flashing 
Green

Indicates the specific stack member’s ID of the 
switch in response to the ‘show stack indicator’ 
command. The LED will repeatedly flash ‘n’ 
times in quick succession, followed by a longer 
pause, where n is the stack member's ID.

Solid 
Green

Indicates that the switch is the STACK Master.

Table 16. STACK LED Descriptions (Continued)