HP 9304m Installation And Getting Started Manual page 150

Figure 5.6 Examples of valid aggregate links
HP ports enabled for link
aggregation follow the same rules
as ports configured for trunk groups.
In this example, assume that link aggregation is enabled on all of the links between the HP device on the left and
the device on the right (which can be either an HP device or another vendor's device). Notice that some ports are
not able to join an aggregate link even though link aggregation is enabled on them. The ports that are not
members of aggregate links in this example are not following the configuration rules for trunk links on HP devices.
The HP rules apply to an HP device even if the device at the other end is from another vendor and uses different
rules. See "Trunk Group Rules" on page 5-3.
The link aggregation feature automates trunk configuration but can coexist with HP's trunk group feature. Link
aggregation parameters do not interfere with trunk group parameters.
Configuring Trunk Groups and Dynamic Link Aggregation
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