Lag Support; Oam Considerations; Qos Considerations - Alcatel-Lucent 7210 SAS M Service Manual

mesh-sdp 5006:5 create
exit
no shutdown
exit
Eth-Rings and Sub-Rings offer a way to build a scalable resilient Ethernet transport network.
Figure
connected to a PBB based Ethernet Ring network. The major rings are connected by Sub-Rings to
the top level major ring. These Sub-Rings require virtual channel and will not work with non-
virtual channel. Ring flushing is contained to major rings, or in the case of a Sub-Ring link or node
failure, to the Sub-Ring and the directly attached major rings.

Lag Support

In 7210, Eth-rings does not support Ethernet rings SAPS on LAGs.

OAM Considerations

Ethernet CFM can be enabled on each individual path under an Ethernet ring. Only down MEPs
can be configured on each of them and CCM sessions can be enabled to monitor the liveliness of
the path using interval of 100 msec. Different CCM intervals can be supported on the path a and
path b in an Ethernet ring. CFM is optional if hardware supports Loss of Signal for example.
In 7210 SAS-M network mode, UP MEPs on service SAPs which multicast into the service and
monitor the active path may be used to monitor services.

QoS Considerations

When Ethernet ring is configured on two ports located on different IOMs, the SAP queues and
virtual schedulers will be created with the actual parameters on each IOM.
Ethernet ring CC messages transmitted over the SAP queues using the default egress QoS policy
will use NC (network class) as a forwarding class. If user traffic is assigned to the NC forwarding
class, it will compete for the same bandwidth resources with the Ethernet CCMs. As CCM loss
could lead to unnecessary switching of the Ethernet ring, congestion of the queues associated with
the NC traffic should be avoided. The operator must configure different QoS Policies to avoid
7210 SAS M Services Guide
6 illustrates a hierarchical ring network using PBB where dual homed services are
Services
Page 59