Alcatel-Lucent 7210 SAS M Service Manual page 385

local-age
Syntax local-age aging-timer
no local-age
Context config>service>vpls
Specifies the aging time for locally learned MAC addresses in the forwarding database (FDB) for the
Description
Virtual Private LAN Service (VPLS) instance. In a VPLS service, MAC addresses are associated with
a Service Access Point (SAP). MACs associated with a SAP are classified as local MACs, and MACs
associated with are remote MACsQinQ / access uplink SAPs.
Like in a Layer 2 switch, learned MACs can be aged out if no packets are sourced from the MAC
address for a period of time (the aging time). The local-age timer specifies the aging time for local
learned MAC addresses.
The no form of this command returns the local aging timer to the default value.
local age 300 — Local MACs aged after 300 seconds.
Default
aging-timer — The aging time for local MACs expressed in seconds.
Parameters
mac-move
Syntax [no] mac-move
Context config>service>vpls
This command enables the context to configure MAC move attributes. A sustained high re-learn rate
Description
can be a sign of a loop somewhere in the VPLS topology. Typically, STP detects loops in the
topology, but for those networks that do not run STP, the mac-move feature is an alternative way to
protect your network against loops.
When enabled in a VPLS, mac-move monitors the re-learn rate of each MAC. If the rate exceeds the
configured maximum allowed limit, it disables the SAP where the source MAC was last seen. The
SAP can be disabled permanently (until a shutdown/no shutdown command is executed) or for a
length of time that grows linearly with the number of times the given SAP was disabled. You have the
option of marking a SAP as non-blockable in the config>service>vpls>sap>limit-mac-move
context. This means that when the re-learn rate has exceeded the limit, another (blockable) SAP will
be disabled instead.
The mac-move command enables the feature at the service level for SAPs, as only those objects can
be blocked by this feature.
The operation of this feature is the same on the SAP. For example, if a MAC address moves from
SAP to SAP, one will be blocked to prevent thrashing.
mac-move will disable a VPLS port when the number of relearns detected has reached the number of
relearns needed to reach the move-frequency in the 5-second interval. For example, when the move-
frequency is configured to 1 (relearn per second) mac-move will disable one of the VPLS ports when
5 relearns were detected during the 5-second interval because then the average move-frequency of 1
relearn per second has been reached. This can already occur in the first second if the real relearn rate
is 5 relearns per second or higher.
7210 SAS M Services Guide
60 — 86400
Values
Virtual Private LAN Services
Page 385