7.3.2 Stack port and stack link
A stacking port is a port that connects the member switches that make up the stack, and the port type varies depending on the model. The following table describes the port types of stacking ports for each model.
|
Model |
Port type of stacking port |
|---|---|
|
AX3660S-24T4X |
QSFP + port #1 |
|
AX3660S-24T4XW |
|
|
AX3660S-48T4XW |
|
|
AX3660S-16S4XW |
|
|
AX3660S-24S8XW |
|
|
AX3660S-48XT4QW |
QSFP28/QSFP + shared port #2 |
|
AX3660S-24X4QW |
|
|
AX3660S-48X4QW |
- Note #1
-
A stack-only port that can only be used as a stack port. It cannot be used as an Ethernet interface for configuring a network. Therefore, QSFP + port can be used only when the stacking function is running.
- Note #2
-
When using a 100 Gigabit interface as a stacking port, only 100GBASE-CR4 is supported.
A stack link is a connection between two member switch stack ports. Connect the stack link directly on the line. Do not connect any other network device between the stacking ports that connect the two member switches.
A stack link is required for two member switches. We recommend that you configure at least two stack links. Redundancy on two or more stack links ensures that the remaining stack links continue to operate even if a particular stack link fails.
If there are two or more stack links, the stack link load balances communication between the member switches. At this time, if the communication performance between stack links differs, there is a high risk that packets resulting from load balancing are discarded. When configuring two or more stack links, use the same direct attach cable and transceiver type (QSFP+/QSFP28) for the stack ports to achieve the same line speed.
Refer to the "Hardware Instruction Manual" for the connection specifications of the stack link.
The stack port is set by stack parameter of the configuration command switchport mode.
For an Ethernet interface used as a stack port, only the following configuration commands can be set.
-
bandwidth
-
description
-
no snmp trap link-status
-
shutdown
Configuration commands other than the above are the operation when the command is omitted. However, note that the following configuration commands do not operate when the command is omitted:
-
flowcontrol
Both receive and transmit operations are off.
-
link debounce
The link-down detection time is unique to the stack port.
-
mtu
MTU is stack-specific. It is not affected by the setting of the configuration command system mtu.