Ingress Explicitly 'In-Profile' State Packet Handling With Profile-Capped Mode - Alcatel-Lucent 7450 Quality Of Service Manual

Ethernet service switch; service router; extensible routing system

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Policer Interaction with Initial Profile, Discard Eligibility, and Ingress Priority

Explicit in-profile packets do not automatically use the high priority threshold ('threshold-be-

high') within the child policer's PIR bucket. If preferential burst tolerance is desired for

explicit in-profile packets, the packets should also be classified as priority high.

Ingress Explicitly 'In-Profile' State Packet Handling with

Profile-Capped Mode

When profile-capped mode is enabled, the packet handling behavior defined in

'Undefined' Initial Profile

greater threshold is actually honored and the packet will be treated as out-of-profile. The

packet will be sent to egress in the 'soft-out-of-profile' state in this case.

Ingress Explicit 'Out-of-Profile' State Packet Handling

Packets that are explicitly 'out-of-profile' remain 'out-of-profile in the ingress forwarding

plane. Unlike initially 'in-profile' packets, they do not consume the policer's CIR bucket

depth (accomplished by setting the 'threshold-bc' to 0) and thus do not have an impact on the

amount of 'undefined' marked as 'in-profile' by the policer.

While explicit 'out-of-profile' packets remain out-of-profile within the ingress forwarding

plane, the egress forwarding plane treats ingress out-of-profile packets as 'soft-out-of-profile'

and the profile may be changed either by explicit profile reclassification or by an egress

policer with a CIR rate defined.

Egress Explicit Profile Reclassification

An egress profile reclassification overrides the ingress derived profile of a packet and may

set it to either 'hard-in-profile' or 'hard-out-of-profile'. A packet that has not been

reclassified at egress retains its 'soft-in-profile' or 'soft-out-of-profile' status.

Egress in-profile (including 'soft-in-profile' and 'hard-in-profile') packets use the child

policer's high 'threshold-be' value within the child policer's PIR bucket while 'soft-out-of-

profile' and 'hard-out-of-profile' packets use the child policer's low 'threshold-be' value.

is altered in one aspect. The CIR output state of yellow at the

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