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This document describes the configurations of Device Management, including device status query, hardware management, Stack, SVF, cloud-based management, PoE, monitoring interface, OPS, energy-saving management, information center, fault management, NTP, synchronous ethernet, PTP.
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S6720LI and S6720S-LI Service Port Stacking Support
S6720LI and S6720S-LI Service Port Stacking Support
For the cables that can be used as stack cables,
see "Cables" in the Hardware Description. Using other cables
may cause exceptions in the stack system, for example, frequent error-down
events on stack ports.
Combo ports cannot function as stack member ports.
For stacking-supported service ports, some
of them can be used as stack ports, whereas some can be used as ordinary
service ports.
Since V200R011C10, S6720LI and S6720S-LI series switches can set up stacks in service
port stacking mode using dedicated stack cables.
The number of stacked switches is recommended
to be 2 to 9.
Table 3-25 Service port stacking support
Device Series
Port Supporting Stacking
Stack Cable
Rate of a Single Port
Remarks
S6720LI and S6720S-LI
40GE ports on the front panel
1 m, 3 m, and 5 m QSFP+ passive high-speed copper cables
QSFP+ optical module (QSFP-40G-SR-BD not supported) and optical
fiber
10 m QSFP+ AOC cable
40 Gbit/s
A stack can be set up between S6720LI models and between S6720S-LI
models, but a stack cannot be set up between S6720LI and S6720S-LI.
When 40GE ports on the front panel are used as stack ports, a switch supports a maximum of two logical
stack ports, and each logical stack port supports a maximum of two
stack member ports. Each switch can use a maximum of two service ports
as stack member ports.
When 10GE optical ports on the front panel are used as stack ports, a switch supports a maximum
of two logical stack ports, and each logical stack port supports at
least one stack member port and at most eight stack member ports.
A switch supports a maximum of 16 stack member ports.
Two rate of ports on an S6720LI or S6720S-LI can both
be configured as stack member ports, but each logical stack port contains
only the same rate of stack member ports.
40GE ports do not support the stacking function
after they are split into 10GE ports.
If stack member ports on the front panel are
connected using 1 m, 3 m, or 5 m QSFP+ passive high-speed copper cables,
their working speed can be increased to 48 Gbit/s using the stack port speed command. After their working speed is
increased to 48 Gbit/s, switches using these ports cannot set up a
stack with switches using ports with the working speed 40 Gbit/s.
Only the last 16 10GE ports on the front panel
can be used to set up a stack using dedicated stack cables.
10GE optical ports on the front panel
1 m, 3 m, and 5 m SFP+ passive high-speed copper cables
10 m SFP+ active high-speed copper cables
3 m and 10 m AOC cables
10GE SFP+ optical module and optical fiber
0.5 m and 1.5 m SFP+ dedicated stack cable (supported in V200R011C10
and later versions)
