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238 C
HAPTER
13: R
ESILIENT
L
INKS
Key Guidelines for
Implementation
Consider these important factors when you implement and configure
resilient links.
General Guidelines
■
Create resilient links before you define your VLANs. If you plan to
create resilient links to be part of a VLAN, create the resilient links
before you create the VLAN.
■
You must reboot the module when you finish defining the resilient
links. (You can define multiple links in one
define
operation.)
■
If you perform an
nvData reset
operation, the module erases all
previous resilient link settings.
■
Resilient links are a point-to-point technology; they do not react to
“downstream” network failures.
■
Inactive links take up ports but do not add to network capacity.
■
You cannot set up resilient link pairs if the Spanning Tree Protocol
(STP) is enabled.
■
You cannot disable ports that are part of a resilient link unless a link
failure occurs.
■
You need to define a resilient link only at one end of the link.
■
If an active standby port fails and you have defined a link on the main
port, the ports toggle and the main port becomes active.
Resilient Link
Define and Modify
To define or modify a resilient link, specify the ports that you want to be
in the resilient link.
Important
Considerations
■
When you define or modify a resilient link, you specify the name of
the link and the ports that you want to associate with the link. You
can specify all ports in one
define
operation.
■
You can define more than one resilient link at a time, so that you
reboot the module only once.
■
When you create a resilient link that includes ports that are part of a
VLAN, those ports are removed from the VLAN. You must modify the
VLAN to add the new bridge port. This consideration does not apply
to the Default VLAN. All ports are part of the Default VLAN.