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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S6720EI and S6720S-EI Service Port Stacking Support
S6720EI and S6720S-EI Service Port Stacking Support
NOTE:
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.
Ports on the ES5D21X08S00 card of S6720EI
series switches cannot function as stack ports.
Since V200R011C10, S6720EI and S6720S-EI 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 3-24 Service port stacking support
Device Series
Port Supporting Stacking
Stack Cable
Rate of a Single Port
Remarks
S6720EI
10GE ports on the front panel
1 m and 3 m SFP+ passive high-speed copper cables
5 m SFP+ passive high-speed copper cables (supported in V200R009C00
and later versions)
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)
10 Gbit/s
A stack can be set up between S6720EI and S6720S-EI if these switches
use the same stack port types. That is, all of them either use 10GE
ports or use 40GE ports.
When 10GE 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.
On an S6720EI switch, when 40GE ports are used as stack member
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 six stack member ports. Each switch can use
a maximum of six service ports as stack member ports.
On an S6720S-EI switch, when 40GE ports are used as stack member
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.
40GE ports do not support the stacking function
after they are split into 10GE ports.
Only the last 16 10GE ports on the front panel
can be used to set up a stack using dedicated stack cables.
On the S6720EI and S6720S-EI, every four of 10GE interfaces on
the left are added to one group. For example, 10GE interfaces numbered
1 to 4 can be added to one group, but 10GE interfaces numbered 2 to
5 cannot. That is, the number of the last 10GE interface in each group
must be the multiple of 4. If you configure any interface in each
group as a physical member interface, configurations on the other
three interfaces in the group will be lost and the three interfaces
cannot be used as service ports.
40GE ports on the front panel and Ports on a 4-port 40GE rear
interface card
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 (supported in V200R009C00 and later versions)
40 Gbit/s
S6720S-EI
10GE 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)
10 Gbit/s
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
NOTE: 
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