Services are configured with default QoS policies. Additional policies must be explicitly created and associated. There is one default service ingress QoS policy, one default access egress QoS policy, two default network QoS policies (one each for the network QoS policy of the ip-interface type and of the port type) and two default port scheduler policies. Only one ingress QoS policy and one egress QoS policy can be applied to a SAP, access port, IP interface, network port, hybrid port, or access uplink port (the support for QoS policy association is different on different 7210 SAS platforms).
When creating a QoS policy, default values are provided for most parameters, with the exception of the policy ID and descriptions. Each policy has a scope, default action, description, meters for ingress policies, and queues for egress policies. The queue is associated with an FC.
QoS policies can be applied to the following service types on 7210 SAS-Sx/S 1/10GE, 7210 SAS-Sx 10/100GE, and 7210 SAS-T (based on the service supported in the particular mode of operation):
Epipe
Only SAP ingress policies are supported on an Epipe service access point (SAP).
VPLS
Only SAP ingress policies are supported on a VPLS SAP.
VPRN
Only SAP ingress policies are supported on a VPRN SAP.
R-VPLS
Only SAP ingress policies are supported on a R-VPLS SAP.
QoS policies can be applied to the following entities on the 7210 SAS-Sx/S 1/10GE, 7210 SAS-Sx 10/100GE, and 7210 SAS-T:
access egress policies and port scheduler policies on access ports
network QoS policies on network ports and hybrid ports in network mode and on access uplink ports in access uplink mode
network queue policies (egress) on network ports and hybrid ports in network mode and on access uplink ports in access uplink mode
On the 7210 SAS-Sx/S 1/10GE, 7210 SAS-Sx 10/100GE, and 7210 SAS-T, all SAPs across all services on a specific port share the egress port queues, which can be configured using the access egress policy and port scheduler policy on an access port.
QoS policies can be applied to the following service types on the 7210 SAS-Mxp, 7210 SAS-R6, and 7210 SAS-R12 in SAP-based egress queuing mode. SAP-egress policies are not supported when port-based egress queuing mode is configured:
Epipe
SAP ingress policies and SAP egress policies are supported on an Epipe SAP.
VPLS
SAP ingress policies and SAP egress policies are supported on a VPLS SAP.
VPRN
SAP ingress policies and SAP egress policies are supported on a VPRN SAP.
IES
SAP-ingress and SAP-egress policies are supported on an IES service.
R-VPLS
SAP ingress policies and SAP egress policies are supported on a R-VPLS SAP.
SAP egress policies are not supported when port-based egress queueing mode is configured. Instead, access egress policies must be used when port-based scheduling is configured and all the SAPs on the port share the egress port queues.
QoS policies can be applied to the following entities on the 7210 SAS-R6 and 7210 SAS-R12, and 7210 SAS-Mxp:
option to use access egress policies for marking in SAP-based scheduling mode and to configure queues and marking in port-based scheduling mode; access egress policies on access ports
network QoS policies on network ports and hybrid ports in network mode and on access uplink ports in access uplink mode
network queue policies (egress) on network ports and hybrid ports in network mode
QoS policies allow operators to prioritize traffic according to the FC and use congestion management to control access ingress, access egress, and network traffic (network port or access-uplink port), enqueuing packets according to their priority (color).