Virtual Private LAN Services
7210 SAS M Services Guide Page 261
VPLS and Rate Limiting
Traffic that is normally flooded throughout the VPLS can be rate limited on SAP ingress through
the use of service ingress QoS policies. In a service ingress QoS policy, individual meters can be
defined per forwarding class to provide rate-limiting/policing of broadcast traffic, MAC multicast
traffic and unknown destination MAC traffic.
MAC Move
The MAC move feature is useful to protect against undetected loops in a VPLS topology as well
as the presence of duplicate MACs in a VPLS service.
If two clients in the VPLS have the same MAC address, the VPLS will experience a high re-learn
rate for the MAC. When MAC move is enabled, the 7210 SAS M will shut down the SAP or
spoke SDP and create an alarm event when the threshold is exceeded.
MAC move allows sequential order port blocking. By configuration, some VPLS ports can be
configured as “non-blockable” which allows simple level of control which ports are being blocked
during loop occurrence.
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