IBM TotalStorage L10, Справочное руководство CLI

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Chapter 2. Configuration menu (root/config)
37
Automatic Trunking configuration menu (root/config/trunk)
Multiple links between switches are called ‘trunks’. Trunks provide higher bandwidth
across cascaded switches for systems incorporating multiple initiators. Each trunk can
improve system throughput and provide ‘failover’ capability. A maximum of 4 trunks
between each switch is supported. Trunking is performed automatically when ports are
configured properly.
Each trunk is part of a trunk group. A trunk group consists of two or more cascades
between two switches. There can only be one trunk group between two switches. Each
trunk group contains a primary trunk. All traffic flows through the primary trunk on a
switch unless specified otherwise using the Load Balancing feature. The primary trunk is
always the lowest numbered port of any trunk group.
If the primary trunk fails, the secondary trunk automatically becomes the primary trunk
unless otherwise configured. Multiple cascades also enable switch configuration for
better performance through load balancing (see "Load Balancing" on page 33).
The Automatic Trunking configuration menu enables you to configure trunking by
defining trunk groups and assigning ports to those groups.
Menu commands
Adding port members to trunk groups (root/config/trunk/addprt)
This command adds port members to a trunk group.
To add a port to a trunk:
From the Trunking configuration menu (root/config/trunk), type
addprt <trunk group
number> <port members>
and press E
NTER
.
Note: To add multiple port member, use commas between port members.
For example, to add ports 3, 5, and 7 to trunk group 1:
From the Trunking configuration menu (root/config/trunk), type
addprt 1 3,5,7
and
press E
NTER
.
Note: This feature should be used with caution as it will override any automated
trunking selection already present on the switch. In addition, the automatic
features for detecting cascade connections will be disabled.
Table 20. Automatic Trunking configuration menu commands
Command Description
Additional
Information
1. addprt Adds one or more port members to a trunk port. See page 37.
2. delprt Removes one or more port members from a trunk
port. See page 38.
3. showmem Displays the port members on a trunk port. See page 38.
4. clr Clears one or more trunk ports. See page 38.
5. .. Returns to the previous menu. See page 10.
6. ? Displays additional information on a command. See page 10.