D-Link xStack DXS-3350SR, Installation & User Manual

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DXS-3350SR Gigabit Layer 3 Switch
So, in this case, you could add extra eight DGS-3324SR Switches to this ring stack. The entire stack would then consist of
nine DGS-3324SR (Token Cost = 2), two DXS-3350SR (Token Cost = 4), three DXS-3326GSR (Token Cost = 2). This
gives a total Token Cost for the stack of:
9 * 2 + 2 * 4 + 3 * 2 ≤ 32
Although the Token Cost is less than 32, the number of Switch boxes is 14, which exceeds the maximum number of 12.
Thus, only extra six DGS-3324SRs can be added to the ring stack.
For further examples, we can:
•
Make a ring stack consisting of 4 DXS-3350SRs (one with module), 3 DGS-3324SRs, 3 DXS-3326GSRs (no
modules). Our Switch count would equal 10 and our token cost would equal 28 (16 + 6 + 6 = 28
≤ 32). Success!
•
Make a ring stack consisting of 4 DGS-3324SRs, 5 DXS-3326GSRs (no modules), 3 DXS-3350SRs (no modules).
Our Switch count would equal 12 and our token cost would equal 30 (8 + 10 + 12 = 30 ≤ 32). Success!
•
Add four 10G modules to an existing ring stack (2 + 2 + 2 + 2 = 8). Using a stack consisting of 6 DGS-3324SRs
and 6 DXS-3326GSRs (12 + 20 = 32). This is the maximum number of Switch boxes allowed in a ring stack. Our
Switch count stays at 12 and our token cost becomes 32 (2 + 2 + 2 + 2 + 24 = 32
≤ 32). Success!
Stacking In a Star Topology
In this case, the DGS-3324SRi is the Master Switch in a star topology. And up to 6 slave Switches can be stacked with
Master Stackable Switch. Check the following examples as a reference guide.
For examples, we can:
•
Make a star stack consisting of 1 DGS-3324SRi (Master), 6 DXS-3350SRs (no modules). Our Switch count would
equal 6+1 and our token cost would equal 26 (2 + 24 = 26
≤ 32). Success!
•
Make a star stack consisting of 1 DGS-3324SRi (Master), 1 DGS-3324SR, 2 DXS-3326GSRs (no modules), 3
DXS-3350SRs (one with module). Our Switch count would equal 6+1 and our token cost would equal 22(2 + 2 +
4 + 14 = 22
≤ 32). Success!
From these examples, we can see that there is a myriad of combinations possible for adding Switches and modules to a
given stack. Yet, you must keep in mind three very important points in configuring the stack:
1. The total Token Cost of Switches stacked must not exceed 32.
2. The total Switch count of Switches stacked in a ring topology cannot exceed 12.
3. The total Switch count of Switches stacked in a star topology cannot exceed 6+1.
NOTE: The total token cost of Switches in a Switch stack cannot exceed 32. Surpassing
this token cost limitation will result in failure of the Switch stack and render the Switches in
it inoperable.
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