Link Dependency Group Status
Use the Link Dependency Group Status page to configure link dependency groups. Link dependency
allows the link status of one interface to be dependent on the link status of another interface. Link state
groups define the interface link dependency.
To access this page, click
System
>
Advanced Configuration
>
Link Dependency
>
Group
in the
navigation menu.
Use the buttons to perform the following tasks:
•
To add a link dependency group, click
Add
. Then, specify a group number, link action, and the
interfaces that share a dependency.
•
To change the settings for a group, select the checkbox for the group and click
Edit
.
•
To delete a link dependency group, select the checkbox for each entry to delete and click
Remove
.
•
To view additional information about a group, select the checkbox for the group and click
Details
.
Table 70: Link Dependency Group Status Fields
Field
Description
Group
The unique link dependency group identifier.
Downstream Interfaces
The set of interfaces that depend on other interfaces. In other words, the link
state of the downstream interfaces depends on the link state of the upstream
interfaces.
Upstream Interfaces
The set of interfaces that determine the link state of the downstream interfaces.
Link Action
The action performed on downstream interfaces when the upstream interfaces
are down, which can be one of the following:
•
Up: Downstream interfaces are up when upstream interfaces are down.
•
Down: Downstream interfaces go down when upstream interfaces are down.
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
to handle the fail-over.
State
The group state, which can be one of the following:
•
Up: Link action is up, and no upstream interfaces have their link up, or link
action is down and there are upstream interfaces that have their link up.
•
Down: Link is down when the above conditions are not true.
Available Interfaces
Available in the Add Group dialog, this field lists the interfaces that can be added
to the group. An interface defined as an upstream interface cannot be defined as
a downstream interface in the same link state group or in a different group.
Similarly, an interface defined as a downstream interface cannot be defined as an
upstream interface.
To move an interface between the Available Interfaces and Downstream
Interfaces or Upstream Interfaces fields, click the interface (or
[Ctrl]
+ click to
select multiple interfaces), and then click the appropriate arrow to move the
selected interfaces to the desired field.
Link Up
Available in the Group Entry Details dialog, this field lists the upstream and
downstream interfaces that currently have their link up.
Link Down
Available in the Group Entry Details dialog, this field lists the upstream and
downstream interfaces that currently have their link down.
Configuring System Information
ExtremeSwitching 200 Series: Administration Guide
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