The ingress component of the policy defines how the IP DSCP and dot1p values using the DSCP and dot1p classification policies are mapped to the internal FC and profile state for the 7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C. The FC and profile state define the Per Hop Behavior (PHB) or the QoS treatment through the system. The mapping on each access-uplink port defaults to the mappings defined in the default network QoS policy until an explicit policy is defined for the access-uplink ports. It also defines the bandwidth-limiting parameters for the traffic mapped to each FC. Traffic mapped to each FC can be limited to configurable bandwidth values using separate queues for unicast traffic and multipoint traffic.
The 7210 SAS platforms provide different mechanisms to limit the bandwidth per FC. On the 7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C, use the queue with packet buffers and a rate shaper to limit and shape the traffic per FC. Use of queues with shapers allows better TCP traffic behavior in the network.
The egress component of the network QoS policy defines the marking values associated with each FC.
The user has an option to define the number of queues to use per access-uplink port and map the FC to queues. By default, network QoS policy ‟1” is used for access-uplink ports, until an explicit policy is associated. The default policy creates eight queues per access-uplink port. The queues are assigned default values for all the parameters defined with the default policy.
Access-uplink port egress marking supports the following:
For packets sent out of an access-uplink port, the network QoS policy defines the marking values (for example, IEEE 802.1p bits and so on) to use based on the FC and the profile state.
The default map of FC to marking values (for example, 802.1p bits) is as shown in the default network QoS policy, policy-id 1.
All non-default network QoS policies inherit the default map and can be modified by the user.
Remarking can be enabled or disabled on access-uplink ports.
An option is available to map FC and profile to either IP DSCP and dot1p bits along with DEI bit.
Non-default network policy parameters can be modified. The no form of the command reverts to the default values.
Changes made to a policy are applied immediately to all access uplink ports where the policy is applied. For this reason, when a policy requires several changes, Nokia recommends that you copy the policy to a work area policy-id. The work-in-progress copy can be modified, and then the original policy-id can be overwritten using the config qos copy command.
See the CLI usage chapter in the 7210 SAS-D, Dxp, K 2F1C2T, K 2F6C4T, K 3SFP+ 8C Basic System Configuration Guide for information about the tasks and commands required to access the CLI, and to configure and maintain your devices.