Dimensión 3: Capacidad de respuesta
3.1 Análisis descriptivo
3.27.1 Description of SR000386: QoS Aware Ethernet Switching
Introduction to the feature
This feature provides Ethernet switching between the available Ethernet interfaces in the SBTS for co-location and chaining scenarios. Quality of service (QoS) and VLAN
awareness are supported.
3.27.1.1 Benefits
End-user benefits
This feature does not affect the end-user experience.
Operator benefits
This feature provides the following benefits to the operator:
• allows separation of traffic flows on Ethernet level by means of separate Ethernet broadcast domains (VLANs)
• eliminates the need for an external device for providing Ethernet switching functionality
• enables traffic aggregation in co-location scenarios
• enables chaining of BTSes
3.27.1.2 Requirements
Hardware requirements
This feature requires Flexi Multiradio 10 System Module (FSMF).
3.27.1.3 Functional description
The feature introduces:
• configurable basic switching
• configurable VLAN aware processing (VLAN ingress filtering, learning, switch look-up, egress processing)
• configurable QoS processing per physical interface (QoS classification, egress scheduling and shaping)
Basic switching
The feature enables configurable switching between the external Ethernet interfaces. To enable basic switching and activate the feature the following must be performed:
• switching between physical interfaces parameter activation
• configuration of physical ports
Each physical port can be activated at the system startup.
An important part of the basic switching functionality is the handling of MAC address learning. The information at which port each MAC address is received is stored in the Forwarding Database (FDB).
VLAN awareness
If switching between physical Ethernet interfaces is enabled, it is possible to also enable VLAN awareness.
When VLAN awareness is enabled the following applies:
• The FDB becomes VLAN aware. The VLAN-ID of a received frame is stored in FDB, so it is possible to differentiate between frames sent from the same source (MAC address) but different VLANs (VLAN-ID). This mechanism is called independent VLAN learning (IVL).
• It is possible to configure which frame types (all, tagged only, untagged + priority-tagged only) are accepted in the ingress direction.
• For each port a configurable Port Default VLAN (PVID) is defined, to determine the forwarding of received untagged and priority-tagged frames.
• For each port a configurable Port Default Priority (PCP) is defined, to determine the QoS behavior of received untagged and priority-tagged frames at the switch egress port, and in the next Ethernet network segment.
• It is possible to configure to which VLAN-IDs each external switch-port belongs (for the internal switch-port it is done automatically). A frame can only egress on those ports that are members of the frame's VLAN-ID. To determine the egress port for a frame the FDB has to be checked for the frame's MAC address and VLAN-ID.
• If the PVID configured on the egress port is the same as the VLAN-ID of the received frame, the VLAN tag of the out-going frame is removed.
Quality of service (QoS) processing
If switching between physical Ethernet interfaces is enabled, it is possible to also enable
Figure 23 Scheduling and shaping of the aggregated traffic Multiradio
10BTS
IP /Ethernet Backhaul
3.27.1.4 System impact
Interdependencies between features This feature requires the following feature:
• SR000350: Ethernet Termination
This feature is a precondition for the features:
• SR000589: IPv4/IPv6 Transport Stack
• SR000402: BTS QoS Support for Terminated and Routed Traffic
Impact on interfaces
This feature has no impact on interfaces.
Impact on network and network element management tools
This feature has no impact on network management or network element management tools.
Impact on system performance and capacity
This feature has no impact on system performance or capacity.
3.27.1.5 SR000386: QoS Aware Ethernet Switching management data
For information on alarm, counter, key performance indicator, and parameter documents, see Reference documentation.
Alarms
There are no alarms related to this feature.
BTS faults and reported alarms
There are no BTS faults related to this feature.
Measurements and counters
Table 77: New counters lists counters introduced with this feature.
Table 77 New counters
Counter ID Counter name Measurement
M51363C0 EthVlanIfDiscFrames Bridge Port Statistics
M51363C1 DiscardedTxFrames_EF Bridge Port Statistics
M51363C2 DiscardedTxFrames_AF1 Bridge Port Statistics
M51363C3 DiscardedTxFrames_AF2 Bridge Port Statistics
M51363C4 DiscardedTxFrames_AF3 Bridge Port Statistics
M51363C5 DiscardedTxFrames_AF4 Bridge Port Statistics
M51363C6 DiscardedTxFrames_BE Bridge Port Statistics
Key performance indicators
There are no key performance indicators related to this feature.
Parameters
Table 78: New parameters lists parameters introduced with this feature.
Table 78 New parameters
Full name Abbreviated name Managed object
Switch port acceptable frame types acceptableFrameTypes BRGPRT
Bridge port object identifier brgPrtId BRGPRT
Bridge port statistics interval bridgePortStatisticsInterval BRGPRT
Table 78 New parameters (Cont.)
Full name Abbreviated name Managed object
Flush fdb on LOS mode flushFdbOnLos BRGPRT
Layer 2 switch burst size l2BurstSize BRGPRT
Ethernet interface shaper rate l2ShaperRate BRGPRT
Layer 2 switch member VLAN identifier list l2VlanIdList BRGPRT Upper value of VLAN identifier range highValue BRGPRT
Low value of VLAN identifier range lowValue BRGPRT
Default VLAN identifier for layer 2 switching portDefaultVlanId BRGPRT Port default VLAN priority portDefaultVlanPriority BRGPRT Internal Bridge port object identifier iBrgPrtId IBRGPRT Default VLAN identifier for layer 2 switching portDefaultVlanId IBRGPRT Port default VLAN priority portDefaultVlanPriority IBRGPRT
DSCP to queue mapping dscpToQueueMap L2SWI
Differentiated services code point (DSCP) value
dscp L2SWI
queue queue L2SWI
Enable layer 2 QoS awareness per switch-port
l2QoSEnabled L2SWI
L2 switch identifier l2SwiId L2SWI
Enable layer 2 switching between physical ports
l2SwitchingEnabled L2SWI
Switch-port scheduler weight for forwarding class AF1
l2WeightAF1 L2SWI
Switch-port scheduler weight for forwarding class AF2
l2WeightAF2 L2SWI
Switch-port scheduler weight for forwarding class AF3
l2WeightAF3 L2SWI
Switch-port scheduler weight for forwarding class AF4
l2WeightAF4 L2SWI
Switch-port scheduler weight for forwarding class BE
l2WeightBE L2SWI
PCP to queue mapping pcpToQueueMap L2SWI
PCP value pcp L2SWI
queue queue L2SWI
Priority queue for non-classified traffic priorityQueueNonClassified L2SWI QoS classification mode qosClassificationCriteria L2SWI VLAN aware switching enable vlanAwarenessEnabled L2SWI
VLAN ID to queue mapping vlanIdToQueueMap L2SWI
queue queue L2SWI
Table 78 New parameters (Cont.)
Full name Abbreviated name Managed object
Upper value of VLAN identifier range vlanIdHighValue L2SWI Low value of VLAN identifier range vlanIdLowValue L2SWI Bridge port statistics measurement interval bridgePortStatisticsInterval PM
3.27.1.6 Sales information
Table 79 Sales information
BSW/ASW License control in network element
BSW