Topology-Change - Allied Telesis x510-28GTX Command Reference Manual

G.8032 E R P
THERNET ING ROTECTION
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TOPOLOGY CHANGE

topology-change

Overview Use this command to enable this G.8032 Ethernet Ring Protection (ERP) instance to
send a Flush Event message after notification of a Topology Change Notification
(TCN) by a detecting instance.
Use the no variant of this command to disable the sending of the Flush Event.
Syntax topology-change {g8032}
no topology-change {g8032}
Default Topology change is enabled by default for G.8032.
Mode G8032 Configure Switch
Usage If this ERP instance is on an interconnecting node, then the ERP instance may need
to be notified of a topology change that occurred in another G.8032 sub-ring
attached to this node. The former will be termed the "target" ERP instance, and the
latter the "detecting" ERP instance.
The criteria for notification is:
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When the detecting ERP instance detects a topology change on its sub-ring,
AlliedWare Plus™ will automatically determine which target ERP instance(s) needs
to be notified. It does this by comparing the same data VLANs in the detecting ERP
instance with all the other instances.
If target ERP instances are identified and these instances also have both an East
and a West interface configured, then those target instances are notified. Upon
notification, the target ERP instance has a couple of actions that it has to perform:
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WITCHING OMMANDS
Parameter Description
g8032
Specify that G.8032 is the protocol that is affected by this
command.
the detecting ERP instance is configured as a sub-ring with a Terminating
interface,
it is protecting the same data VLANs as the target instance, and
the target ERP instance must have two ring ports.
To flush the FDB on both its East and West interfaces for the protected
VLANs.
To send out an R-APS flush event message over its East and West interfaces.
The flush event message is sent around the target ring and each node on the
target ring will perform an FDB flush of its protected VLANs. The sending of
a R-APS flush event may not be needed in some cases and as such it is
configurable.
Command Reference for x510 Series
AlliedWare Plus™ Operating System - Version 5.4.7-1.x
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