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physical-interface (DDoS Flow Detection)

 

Syntax

Hierarchy Level

Release Information

Statement introduced in Junos OS Release 12.3.

Support for Enhanced Subscriber Management added in Junos OS Release 17.3R1.

Description

(MX Series routers with only MPCs, T4000 Core Routers with only FPC5s, or EX9200 switches) Configure flow bandwidth, flow control mode, or flow detection mode at the physical interface flow aggregation level for the packet type.

Options

flow-bandwidth—Bandwidth for the flow at the physical interface level. Available only at the [edit system ddos-protection protocols protocol-group packet-type flow-level-bandwidth] hierarchy level.

Default: 20,000 packets per second

Range: 1 through 50,000 packets per second

flow-control-mode—Mode for how traffic in the detected flow is controlled at the physical interface level. Available only at the [edit system ddos-protection protocols protocol-group packet-type flow-level-control] hierarchy level.

Note

The configuration at this level overrides the global configuration using the flow-level-control statement at the [edit system ddos-protection global] hierarchy level.

  • drop—Drop all traffic in flow.

  • keep—Keep all traffic in flow.

  • police—Police the traffic to within its allowed bandwidth.

Default: drop

flow-detection-mode—Mode for how flow detection operates at the physical interface level when a policer has been violated. Available only at the [edit system ddos-protection protocols protocol-group packet-type flow-level-detection] hierarchy level.

Note

The configuration at this level overrides the global configuration using the flow-detection-mode statement at the [edit system ddos-protection global] hierarchy level.

  • automatic—Search flows at the physical interface level only when a DDoS policer is being violated and only when the policer violation is not discovered at the finer aggregation levels, logical interface or subscriber. Flows at the physical interface level are subsequently not searched again until a subsequent violation occurs that cannot be found at the subscriber or logical interface levels.

  • off—Disable flow detection at the physical interface level so that flows are never searched at this level.

  • on—Search flows at the physical interface level, even when no DDoS protection policer is currently being violated. Monitoring continues at this level regardless of whether a suspect flow is identified at this level.

Default: automatic

Required Privilege Level

admin—To view this statement in the configuration.

admin-control—To add this statement to the configuration.