Alcatel-Lucent 1643 AMS User's Operation Manual page 440

Traffic provisioning
Provisioning the rate control mode
The desired rate control mode can be chosen by enabling/disabling oversubscription
support (QoS_osub = enabled/disabled), and by setting the CIR and PIR values.CIR
and PIR values can be set by means of QoS profiles (see
provisioning" (p.
The setting of the QoS_osub configuration parameter in combination with the
relationship between CIR and PIR determines which rate control mode becomes
effective. If, for example, oversubscription support is enabled, and the relationship
between CIR and PIR is CIR = PIR ≤ MAX, then the rate controller is operated in
strict policing mode.
Important!
1. Which of the rate control modes can actually be configured depends on the
2. As a general rule it is recommended to use the oversubscription mode for
Dropper / Marker
Based on the indication of the rate controller, and the rate control mode for the flow,
the dropper/marker will do the following:
Incoming rate < CIR
Incoming rate > CIR
In the dropper function a decision is made whether to drop or forward a packet. On a
TransLAN
implemented. Packets that are marked red are always dropped. If WAN Ethernet link
congestion occurs, frames are dropped. Yellow packets are always dropped before any
of the green packets are dropped. This is the only dependency on queue occupation
and packet color that is currently present in the dropper function. No provisioning is
needed.
....................................................................................................................................................................................................................................
8-88
0 = CIR < PIR < MAX
(CIR)
0 kbit/s
yellow
8-94)).
mode of operation (see
TCP/IP applications, especially in case of meshed or ring network topologies
where multiple end-users share the available bandwidth.
No rate control
mark "green"
mark "green"
®
card a deterministic dropping from tail when the queue is full is
Alcatel-Lucent - Proprietary
PIR
red
"Quality of Service configuration options" (p.
Oversubscription mode
mark "green"
mark "yellow"
See notice on first page
Classification, queueing, and scheduling
Information
rate
"Quality of Service
Strict policing mode
mark "green"
drop
8-82)).
365-312-807R7.2
Issue 4, May 2007