Allied Telesis AT-x950-28XSQ, Installation Manual

Page: 50 / 190

Chapter 2: Virtual Chassis Stacking
50
Stack Trunks
The switches of a stack are connected with a physical network link called
a stack trunk. Here are general trunk guidelines:
 The ports of a stack trunk can be 10Gbps, 40Gbps, or 100Gbps.
 The switch does not have default trunk ports.
 A stack can have only one trunk, but, as explained in this section, a
trunk can have more than one physical link.

You designate trunk ports with the STACKPORT command in the
AlliedWare Plus operating system.
 Once you have designated ports as trunk ports, you cannot view or
change their parameter settings.

The fiber optic transceivers or direct attach cables of a trunk must
be from Allied Telesis. Transceivers or cables from other network
equipment providers might not perform properly in stack trunks.
For a list of supported transceivers, refer to the Allied Telesis web
site.

A stack of AT-x950-28XSQ Switches cannot have other stacking
products, such as x600 Series switches.
 A trunk must have a minimum of two physical links.The more links
in a trunk the greater its bandwidth and resiliency.

If the trunk fails, the two switches revert to stand-alone devices.
You use ports or transceiver slots from these groups to build a stack trunk:

“10Gbps SFP+ Transceiver Slots,” next

“40/100Gbps Transceiver Slots” on page 53

“Optional XEM2 Line Cards” on page 55
10Gbps SFP+
Transceiver Slots
Here are the guidelines for stack trunks of 10Gbps transceiver slots,
identified in Figure 19:
Figure 19. Base 10Gbps Transceiver Slots

A stack trunk can have from two to eight links.
Base 10Gbps SFP+
Transceivers Slots