User guide

E
XTREME
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ARE
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OFTWARE
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SER
G
UIDE
4-9
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OAD
S
HARING ON THE
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LACK
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IAMOND AND
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LPINE
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WITCH
The address-based and round-robin load-sharing algorithms are supported by
BlackDiamond switch modules that use the “i” chipset and all Alpine 3800 switch
modules. The modules end with an “i” in their model designation (for example,
G12SXi), and require the use of the MSM64i. For more information on “i” chipset
products, refer to Chapter 1.
C
ONFIGURING
B
LACK
D
IAMOND AND
A
LPINE
S
WITCH
L
OAD
S
HARING
To set up the BlackDiamond or Alpine switch to load share among ports, you must
create a load-sharing group of ports. Load-sharing groups are defined according to the
following rules:
• The first port in the load-sharing group is configured to be the “master” logical port.
This is the reference port used in configuration commands. It can be thought of as
the logical port representing the entire port group.
On I/O modules that do not have the “i” chipset, the following additional rules apply:
• Ports in a load-sharing group must be contiguous.
• Ports on the I/O module are divided into groups of two or four.
Follow the outlined boxes in Ta ble 4 -2 , Table 4-3 , and Ta bl e 4-4 to determine the valid
port combinations.
Tab le 4-2, Ta bl e 4- 3, and Ta bl e 4 - 4 show the possible load-sharing port group
combinations for the G4X module, the G6X module, and the F32T and F32F modules,
respectively.
Table 4- 2: Port Combinations for the G4X Module
Load-Sharing
Group
1 23 4
4-port groups x x x x
2-port groups x x x x