In order to provide enhanced QoS services, traffic must be classified, and conditioned. There are two settings within switched mode: Transparent and IEEE 802.1q mode. Switched Mode: Alcatel-Lucent 1665 DMX can perform VLAN processing and enhanced QoS in switched mode. In PL mode, if rate control is desired, the traffic management mode will be port mode (see Traffic Conditioners below). Private Line: Alcatel-Lucent 1665 DMX can perform rate controlling at a sub-STS level and on a per-port basis in PL mode.
Also, within the two modes below, there are a variety of traffic conditioners which can be applied, depending on the mode) which further govern the QoS capabilities of the pack. The QoS capabilities of the LNW170 are different depending on the mode the card is in. The LNW170 can function in either Private Line or Switched mode. The capabilities of the LNW170 enable enhanced QoS features. If flow control is disabled or ignored by the external equipment, Ethernet frames are dropped when the ingress buffer overflows.
Traffic is buffered and flow control is invoked when ingress traffic on a LAN port exceeds the VCG's SONET bandwidth.
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100 Mbps traffic can be rate-limited by provisioning less SONET bandwidth than required to carry the full line rate. Each LAN port is connected to its own VCG. The LNW74 circuit packs provide 10 Mbps and 100 Mbps Private Line services. LNW170 enables advanced QoS capabilities including CIR rate metering.įor detailed information about Ethernet frame priority levels, see Peak information rate (PIR) policing provides rate limiting with 1 Mbps granularity. Private line service provides dedicated bandwidth between two points service (best QoS).įractional rate services provide basic rate control with SONET tributary granularity.Ĭommitted information rate (CIR) policing provides rate limiting with 1 Mbps granularity. Alcatel-Lucent 1665 DMX supports the following Quality of Service (QoS) capabilities:
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