Stack Trunk; 40Gbps Stack Trunks; Table 17: Default (40Gbps) And Optional (10Gbps) Trunk Ports - Allied Telesis AT-x550-18XTQ Installation Manual

Chapter 2: Virtual Chassis Stacking

Stack Trunk

40Gbps Stack
Trunks
54
A stack trunk connects the switches of a stack together. It consists of two
ports on each device. For switches with AlliedWare Plus v5.4.8-0.2 or
later, you can choose the two ports. Refer to Table 17:
Table 17. Default (40Gbps) and Optional (10Gbps) Trunk Ports
Switch
AT-x550-18XTQ
AT-x550-18XSQ
AT-x550-18XSPQm 7/S1, 8/S2
1. 1Gbps and 10Gbps twisted pair ports.
2. 1Gbps SFP and 10Gbps SFP+ transceiver slots.
3. 1/2.5/5/10Gbps PoE+ twisted pair ports.
Note
For switches with AlliedWare Plus v5.4.7A-0, you have to use
QSFP+ ports 17 and 21 for the stack trunk.
The guidelines are discussed in the following sections:
 "40Gbps Stack Trunks," next
 "10Gbps Stack Trunks" on page 61
Note
The following discussions apply to AlliedWare Plus v5.4.8-0.2 or
later. Earlier versions of the operating system have different trunk
rules and restrictions.
Here are the stacking guidelines for 40Gbps trunks:
 40Gbps trunks use the two QSFP+ ports 17 and 21.
 The 40Gbps QSFP+ ports are the default stacking ports.
 You can use the QSFP+ ports to build stacks of two, three, or four
AT-x550 Series switches.

The QSFP+ ports can be used as regular Ethernet networking
ports by disabling the stacking feature or using 10Gbps ports for
the stack trunk.
Optional Trunk Ports
(10Gbps)
15/S1, 16/S2
15/S1, 16/S2
3
15/S3, 16/S4
Default Trunk
Ports
(40Gbps)
1
17/S3, 21/S4
2
17/S3, 21/S4
3
17/S5, 21/S6