Alcatel-Lucent 7210 SAS-X - Configuration Guidelines for 7210 SAS-R6; Lag Support; OAM Considerations; Qos Considerations

Services
7210 SAS-X, R6 OS Services Guide Page 53
Configuration Guidelines for 7210 SAS-R6
The user needs to reserve VLANs using the system resource-profile command 'g8032-control-
sap-tags'. A maximum of up to 4 VLANs needs to be reserved per line card. These VLANs will be
used to internally identify G8032 CCM messages and R-APS messages. These VLANs cannot be
used on any of the ports of the IMM, in other words, SAPs cannot be configured with VLAN tag
value matching any of the configured VLAN tags using this command.
Lag Support
The 7210 SAS does not support G.8032 Ethernet rings 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.
Service Down MEPs cannot be configured on the same port as the G8032 ring ports.
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
congestion for the CCM forwarding class by controlling the amount of traffic assigned into the
corresponding queue.
Details of the Ethernet ring applicability in the services solution can be found in the respective
Layer 2 sections of the 7210 SAS X OS Services Guide.
Support Service and Solution Combinations