RAD ETX-202A EtherAcces Carrier Ethernet Demarcation Device

Model: ETX-202A

In good working condition

Included:

• 1 x RAD ETX-202A EtherAcces Carrier Ethernet Demarcation Device

More Info:
ETX-202A Carrier Ethernet Demarcation Device

ETX-202A is acarrierEthernetdemarcation device owned and operated by the service provider and installed at the customer premises. The device is part of RAD’s EtherAccess® portfolio and featuresCarrierEthernetattributes, includingEthernetOAMfor proactiveSLAmonitoring, quality of service (QoS) perEthernetflow, advanced traffic management capabilities, and powerfulbandwidthprofiles for differentiated services – all starting at the service handoff points.ETX-202A is equipped with twoEthernetnetworkports (copper or SFP-based interfaces), supporting link protection based on 802.3ad or dual homing for increased service resiliency. The fourEthernetsubscriber ports use copper or SFP-based interfaces. The SFP-basedEthernetports
accommodate a wide range of FastEthernetandGigabit EthernetSFPtransceivers, allowing service providers to seamlessly connect customers located at different distances from the device.

RAD ETX-202A FLEXIBLE TRAFFIC MAPPING
Traffic is mapped to theEthernetflows (EVCs) using very flexible classification criteria that can be combined, for example:
• Port-based (All-to-one DSCP
• Ether Type
• Untagged.
More classification criteria and combinations can be found in the user manual.

HIERARCHICAL SCHEDULING AND SHAPING PER FLOW WITH RAD ETX-202A
Every flow has its own queues and scheduler. ETX-202A supports up to 270 services, and a total of 30 queue blocks pernetworkport. Each queueblockis a group of eight queues perCoS. Each flow can be bound to each queueblock.ETX-202AQOS
Different service types require different levels ofQoSto be provided end-to-end.QoScan be defined per subscriber as well as per service.QoShas three aspects: rate limitation, traffic shaping, and traffic prioritization. Traffic policing is applied per flow or group of flows, and operates according to the dual token bucket mechanism based on user-configurableCIR+ CBS and EIR + EBS. Traffic can be limited to the line rate or the data rate.
For prioritizing user traffic, ETX-202A maps user traffic to eight separate queues. Each can be configured as strict priority queues or weighted fair queues (WFQ). The queues handle traffic with different service demands, such as real-time traffic, premium data, or best-effort data. The device uses the WRED policy to ensure that queues are not congested and high-priority traffic is not dropped.ETHERNETOAM
EthernetOAMis one of the important tools that has upgradedEthernettechnology tocarrierEthernetclass. It enables providers to deliver ‘SONET/SDH-like’ quality over packet-switched networks. ETX-202A implements the full suite ofEthernetOAMstandards, which can be monitored by performance monitoring systems such as RADview or a third-party tool. The RAD ETX-202A provides these types of
EthernetOAM:
• Single-segment (link)OAMaccording toIEEE802.3-2005 (formerly 802.3ah) for remote management and fault indication, including remoteloopback, dying gasp, andMIBparameter retrieval
• End-to-end connectivityOAMbased onIEEE802.1ag that enablesEthernetservice providers to monitor their services proactively and guarantee that customers receive the contractedSLA
• End-to-end service and performance monitoring based on ITU-TY.1731. Fault monitoring and end-to-end performance measurement include frame delay, frame delay variation, frame loss and RAD ETX-202A
Two redundancy modes can be applied:
• Link aggregation (LAG) based on 802.3ad
• Dual homing (1:1), allowing ETX-202A to be connected to two different upstream devices.TYPICAL RAD ETX-202A APPLICATIONS
ETX-202A is used in the following MEF-defined applications:
•EthernetVirtual Private Line (EVPL) – Site-to-site connectivity over sharedbandwidthwith service multiplexing (see Figure 1)
•EthernetPrivate Line (EPL) – Site-to-site connectivity over dedicatedbandwidthwithout service multiplexing (see Figure 2).LAYER-2/ LAYER-3LOOPBACKWITHMACANDIP ADDRESSSWAPPING
Layer-2 and/or layer-3networkintegrity can be tested by a non-disruptiveloopbackperformed per flow, with swapping ofMAC addressand optionallyIP address. When theloopbackis activated, ETX-202A exchanges the source and destination MAC/IP addresses of the
incoming packets. Thisloopbackpasses throughEthernetbridges (MAC address) and routers (IP address).ETX-202A L2CP HANDLING
ETX-202A can be configured to pass through Layer-2 control frames (including other vendors’ L2CP frames) across the network, to peer-supported protocols (802.3ah), or to discard the L2CP frames.FAULT PROPAGATION
The unit provides a user-configurable fault propagation mechanism. When a link failure is detected at thenetworkport, ETX-202A optionally shuts down a userportuntil thenetworklink is restored. The fault propagation mechanism enables routers andswitchesconnected to both ends of the link to reroute the traffic to the redundancy path.

DYING GASP FEATURE OF RAD ETX-202A
Units equipped withACpower supply report power failures to definednetworkmanagement stations by sending traps,
thus enabling the unit to properly disconnect from thenetwork.MANAGEMENT
The unit can be managed using the following ports and applications:
• Local management via anASCIIterminal connected to theRS-232port
• Remote inband management via user ornetworkportsroutedvia separateVLANs,Telnet, or RADview, RAD’s SNMP-based management system
• Out-of-band management via a dedicated managementport.ETX-202A COMMAND LINEINTERFACE
Databases and scripts of commonly used commands can be easily created and applied to multiple units using command lineinterface.SECURITY
The following security protocols are provided by ETX-202A to ensure client server communication privacy and correct user SSH for Secure Shell communication session.JUMBO FRAMES AND EGRESSMTU
The unit supports large frames of up to 12 Kbytes. The egressMTUcan be defined perport(UNI/NNI).DHCPIP address,IPmask, and defaultgatewaycan be automatically obtained using DHCP.

Key points to remember about the ETX-202A device delivering business services over fiber infrastructure
•MEFcertified, supportingEthernetPrivate Line (EPL) andEthernetVirtual Private Line (EVPL) services with flexible mapping of user traffic intoEthernetflows
• Robustbandwidthcontrol mechanism and Service Level Agreement (SLA) monitoring perEthernetflow starting at customer premises
• CompleteEthernetOAMsolution based onIEEE802.3-2005 (formerly 802.3ah),IEEE802.1ag, and ITU-TY.1731for Opex reductions
•Networklink protection based on 802.3ad or dual homing for increased service resiliency

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AJ 111482-2 (I/B 111479)