Dell Force10 S4820T Installing the S4820T System - Page 33

Connecting the Stacking Ports (Optional), Important Port-Stacking Points to Know

Get Dell Force10 S4820T PDF manuals and user guides View all Dell Force10 S4820T manuals
Add to My Manuals
Save this manual to your list of manuals

Page 33 highlights

Connecting the Stacking Ports (Optional) Before you make your stacking port connections, rack-mount the systems or insert them into a cabinet. To connect the stacking ports, insert one end of the cable into a configured port and insert the other end of the cable into a similarly configured port of the adjacent system. NOTE: The maximum number of S4820T switches that can be stacked together is six. There are no unique stacking ports; you can configure the RJ-45 and QSFP+ ports to act as stacking ports. The RJ-45 ports are labeled 0-47. The QSFP+ ports are labeled 48 and 56 for the lower QSFP+ ports and 52 and 60 for the upper QSFP+ ports. NOTE: The S4820T system cannot be stacked with other S-Series systems. NOTE: Data Center Bridging is not supported on the S4820T if ports 0 - 47 are being used for stacking. Important Port-Stacking Points to Know When stacking the S4820T, keep the following in mind: • Data ports are configured as stacking ports in predefined stacking groups of 40G (four 10G ports or one 40G port). • When a stack-group number is assigned, the ports associated with that group are configured as stacking ports (Figure 4-7): • stack-group 0 = ports 0-3, stack-group 1 = ports 4-7, stack-group 2 = ports 8-11, and so on through stack-group 11 = ports 44-47. • stack-group 12 = port 48, stack-group 13 = port 52, stack-group 14 = port 56, stack-group 15 = port 60. • All the ports in a stack-group are placed in stacking mode. You cannot use the unused ports in that group as data ports. Figure 4-7. S4820T Stack-Group Assignment Stack Group 1 Stack Group 3 Stack Group 11 SG-13 SG-15 Stack Group 0 Stack Group 2 Stack Group 10 SG-12 SG-14 You can connect the systems while they are powered down or up. Stacking ports are bi-directional. The S4820T supports stacking in either a ring or a cascade topology (Figure 4-8). To provide redundant connectivity, Dell Force10 recommends using the ring topology when stacking S4820T systems. Installing the S4820T | 33

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
Installing the S4820T
|
33
Connecting the Stacking Ports (Optional)
Before you make your stacking port connections, rack-mount the systems or insert them into a cabinet.
To connect the stacking ports, insert one end of the cable into a configured port and insert the other end of
the cable into a similarly configured port of the adjacent system.
NOTE:
The maximum number of S4820T switches that can be stacked together is six.
There are no unique stacking ports; you can configure the RJ-45 and QSFP+ ports to act as stacking
ports. The RJ-45 ports are labeled 0-47. The QSFP+ ports are labeled 48 and 56 for the lower QSFP+
ports and 52 and 60 for the upper QSFP+ ports.
NOTE:
The S4820T system cannot be stacked with other S-Series systems.
NOTE:
Data Center Bridging is not supported on the S4820T if ports 0 - 47 are being used for stacking.
Important Port-Stacking Points to Know
When stacking the S4820T, keep the following in mind:
•
Data ports are configured as stacking ports in predefined stacking groups of 40G (four 10G ports or one
40G port).
•
When a stack-group number is assigned, the ports associated with that group are configured as stacking
ports (
Figure 4-7
):
•
stack-group 0 = ports 0-3, stack-group 1 = ports 4-7, stack-group 2 = ports 8-11, and so on
through stack-group 11 = ports 44-47.
•
stack-group 12 = port 48, stack-group 13 = port 52, stack-group 14 = port 56, stack-group 15 =
port 60.
•
All the ports in a stack-group are placed in stacking mode. You cannot use the unused ports in that group
as data ports.
Figure 4-7.
S4820T Stack-Group Assignment
You can connect the systems while they are powered down or up. Stacking ports are bi-directional. The
S4820T supports stacking in either a ring or a cascade topology (
Figure 4-8
). To provide redundant
connectivity, Dell Force10 recommends using the ring topology when stacking S4820T systems.
Stack Group 0
Stack Group 1
Stack Group 2
Stack Group 3
Stack Group 11
Stack Group 10
SG-13
SG-15
SG-12 SG-14