v4.1 bstu4 features and applications copyright © siemens schweiz ag 2007

V4.1 BSTU4 Features and Applications

Copyright © Siemens Schweiz AG 2007

Siemens Switzerland Ltd

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Target for BSTU4 features

Extend and optimize the features of 4 port layer 2 switch compared with STU4 according to the demands and needs of ULAF+ customers

Enable the flexible application for various Ethernet services without external switch

Enable the realization of Ethernet services via TDM and packet data backbone networks with state-of-the-art configuration and maintenance using QoS and CoS according to IEEE standards


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BSTU4: New features compared with STU4

STU44 ports L2 switch VLAN transparent

BSTU4

Embedded Clock Operation

Integrated into ULAF+V5.0

VLAN Support (up to 16 VLANs)

VLAN Termination+ Q-in-Q QoS

Port prioritization Support of BSRU

Link aggregation4, 8 or 16 wire pairs scalable


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BSTU4: 4 port L2-switch

Individually configurable 10/100BaseTX ports IEEE 802.3u(using LCT or AccessIntegratorEM ULAF+)

• Plug-in: 3 ports at the frontand one connected to the backplane of ULAF+ V5.0 subrack • Desktop: 4 ports

Ports can be individually deactivated to save power inremote powered locations

10BaseT/100BaseTX

Full- / half duplex operation; Auto negotiating

Link Failure Propagation (LFP)

Flow control (pause frames or back pressure)

Automatic MDI / MDI-X crossover

VLAN and QoS supported

Handling of oversized frames up to 2000 bytes

Link Aggregation (IEEE 802.3ad)

Self-learning switch (1024 MAC addresses

Ingress Rate Limiting

Broadcast Storm Protection

VLAN IEEE 802.1Q support

Provider VLAN IEEE 802.1ad

16 simultaneous active VLAN


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Quality of Service

Priority Queues

• 4 priority queues

• Transmit Queue Algorithms :

“Weighted Fairness Queuing” (WFQ)

“Strict Priority Queuing” (SP)

Prioritization

• Based on port

• Based on IEEE 802.1p

• Based on DSCP

• Based on VLAN ID


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Applications (1): STU4 versus BSTU4

STU4

QoS-- Based on port-- Based on IEEE 802.1p -- Based on DSCP-- Based on VLAN ID

STU4

C-VLANC-VLAN

BSTU4 BSTU4

C-VLAN: Customer Virtual LAN

SHDSL or networkconnections

C-VLAN C-VLAN

: External switch


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Applications (2): Point-to-point connections

BSTU4

10/100BaseTx 10/100BaseTx

SHDSL via 1…4 wire pairs

C-VLAN A

C-VLAN A

BSTU4

C-VLANB

VoIP

C-VLANB

VoIP-Classify ingress frames (QoS) based on Port / 802.1p / DSCP/VLAN-Limit bandwidth


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Applications (3): Connections via TDM based backbone network

BSTU4

C-VLAN A

BSTU4

VoIP VoIP

C-VLAN A

C-VLAN B

QSTU QSTU

TDM Network

C-LANB

-Classify ingress frames (QoS) based on Port / 802.1p / DSCP/VLAN-Limit bandwidth


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Applications (4): Connections via Metro Ethernet Network

BSTU4

10/100BaseTx

C-VLAN A

BSTU4

VoIP

VoIP P-VLAN Termination Points -Add P-VLAN ID -Classify ingress frames (QoS) - Limit bandwidth

C-VLAN A

C-VLAN B

BSTU4

BSTU4

C-LANB

P-VLAN (Provider VLAN)

C-VLAN A

VoIP

C-LANBBSTU4

ULAF+ V5 subrack

GbE

Metro Ethernet Network


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Integration in ULAF+ V5

BSTU4 plug-in version with direct access to backplane of ULAF+ V5.0 subrack (S3105-B628-A210)

No Ethernet cabling necessary


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Applications in ULAF+ V5 using BSTU4 plug-in

BSTU4 plug-in

ULAF+ V5 subrack*

BSTU4 plug-in

GbE uplink(optical or copper)

WAN

C-VLAN A

C-VLAN B

Packet Network

BSTU4

*S3105-B628-A210


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MCS Comparison with another copper bonding schemes

*) Not yet implemented in ULAF+ systems. Can be implemented on customer request.


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MCS Multi Channel Synchronisation

Bundling of 2..4 channels over transparent or structured TDM networks

Resiliency

Independent Rx- and Tx- data streams

Network delta delay compensation

Minimised additional delay caused by MCS (< 100µs)

Autonomous detection and correction of wire pair or channel interchange

Proprietary and patented inverse multiplexing algorithm


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Embedded clock operation

BSTU desktop units are equipped with 2,048MHz clock input/output interface(BNC 75 Ohm). High quality clock can be provided to the remote location usnig synchronous SHDSL transmission.

SHDSL via 1…4 wire pairs

BSTU4 (RT)

ULAF+ subrack 2,048MHz clock inpute.g.from SDH

Timing output

Mobile network BTS / NodeB

BSTU4 COT

BSTU4 (COT)

2,048MHz clock input

Timing outputSHDSL via 1…4 wire pairs

BSTU4 (RT)


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BSTU4 scalability2x 4 wire pairs with Link Aggregation, up to 45,6Mbit/s

NT1

1

1

1

BSTU4 BSRU BSRU BSTU4

LTP1 2

2

2

2

P1

1... …4

NT1

1

1

1

LTP1 2

2

2

2

P1

P2 P2


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BSTU4DSLAM Backhaul with Link Aggregation

Link Aggregation (IEEE 802.3ad) Ethernet Frames are distributed among different links (based on MAC-Addresses) Up to 91,2Mbit/s over up to 16 wire pairs can be aggregated Easy to set-up and configure with Ulaf+ LCT or AccessIntegrator

BSTU4

BSTU4

BSTU4

BSTU4 BSTU4

BSTU4

BSTU4

BSTU4

22.8MBit/s

22.8MBit/s

22.8MBit/s

22.8MBit/s

Incoming Packets with different MAC addresses

Σ=91,2Mbit/se.g. DSLAM

Metro EthernetNetwork


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Siemens Switzerland Ltd.International Sales EIP AAlbisriederstrasse 245CH-8047 Zurich

Tel.: + 41-585 586 144Fax: + 41-585 585 414e-mail: [email protected]: http://www.siemens.ch/ulaf

Your contact

Sales

v4.1 bstu4 features and applications copyright © siemens schweiz ag 2007

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