Dell PowerConnect M6220, Руководство по настройке пользователя

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Configuring Port Characteristics
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You can create a maximum of 72 dependency groups for stacking switches or
16 groups for a standalone switch. The ports participating in the Link
Dependency can be across all the Stack Units (Manager/Member unit).
Link Action
The link action specifies the action that the group members will take when
the dependent port is down. The group members can transition to the same
state as the dependant port, or they can transition to the opposite state. In
other words, if the link action is down and the dependent port goes down, the
members ports will go down as well. Conversely, when the link action is up
and the dependant link goes down, the group member ports are enabled
(brought up).
Creating a link dependency group with the
up link action essentially creates a
backup link for the dependent link and alleviates the need to implement STP
to handle the fail-over.
Link Dependency Scenarios
The Link Dependency feature supports the scenarios in the following list.
• Port dependent on port — If a port loses the link, the switch brings
up/down the link on another port.
• Port dependent on LAG — If all ports in a channel-group lose the link, the
switch brings up/down the link on another port.
• LAG dependent on port — If a port loses the link, the switch brings
up/down all links in a channel-group.
• Multiple port command — If a group of ports lose their link, the switch
brings up/down the link on another group of ports.
• Overlapping ports — Overlapping ports on different groups will be
brought up/down only if both dependent ports lose the link.
NOTE:
Whether the member ports or LAGs are brought
up
or
down
depends on
the link action.