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Multifield Classifier for Ingress Queuing on MX Series Routers with MPC

Beginning with Junos OS Release 16.1, the multifield classifier for ingress queuing is an implementation point for firewall filters configured with specific traffic shaping actions. These filters allow you to set the forwarding class and packet loss priority for packets, or drop the packets prior to ingress queue selection. The filters are applied as ingress queue filters. Class-of-service (CoS) commands can then be used to select ingress queue, set rate limiting and so forth.

Firewall filters configured at the protocol family level are able to distinguish specific types of traffic from other types by matching on multiple fields within the packet header. The number and types of matches available depend on which protocol family is used in the filter. Before the introduction of the ingress queuing filter, these firewall filters could only be applied to traffic after the ingress queue had been selected based solely on the behavior aggregate (BA). With the introduction of the ingress queuing filter, firewall filters can be used to set forwarding classification and packet loss priority based on multiple fields within the packet header prior to forwarding queue selection. CoS functions provide traffic classification options and the ability to assign that classified traffic to specific forwarding queues.

Note:

Ingress queuing filters are only available when the traffic manager mode is set to ingress-and-egress at the [edit chassis fpc fpc-id pic pic-id traffic-manager mode] hierarchy level.

The ingress-queuing-filter configuration statement is used at the [edit interfaces interface-name unit unit-number family family-name] hierarchy level to designate a previously configured firewall filter to be used as an ingress queuing filter. The following list shows which protocol families are compatible with the ingress-queuing-filter statement:

  • bridge

  • ccc

  • inet

  • inet6

  • mpls

  • vpls

The named firewall filter is a normal firewall filter that must be configured with at least one of the following actions: accept, discard, forwarding-class, and loss-priority.

Related Documentation

Release History Table
Release
Description
16.1
Beginning with Junos OS Release 16.1, the multifield classifier for ingress queuing is an implementation point for firewall filters configured with specific traffic shaping actions.