ETX-220A 10 GbE Carrier Ethernet Demarcation Device
ETX-220A 10 GbE Carrier Ethernet Demarcation point for SLA-based Ethernet business services and
mobile backhaul
Key
points of the RAD ETX-220A include:
Carrier-class 10 GbE Ethernet demarcation device providing 40Gbps system throughput
MEF compliant, supporting MEF applications Ethernet Private Line (EPL) and Ethernet Virtual Private Line (EVPL) with flexible mapping of user traffic into
Ethernet flows
Robust bandwidth control mechanism and Service Level Agreement (SLA) monitoring per Ethernet flow starting at customer premises
Complete Ethernet OAM solution based on IEEE 802.3-2005 (formerly 802.3ah), IEEE 802.1ag-D8, and ITU-T Y.1731 for Opex reductions
Built-in RFC-2544 generator and analyzer
The ETX-220A is a Carrier Ethernet demarcation device that provides end-to-end service control and
performance management across packet
backhaul.
The device delivers SLA-based business services to the customer premises over native Ethernet access networks.
ETX-220A transports up to 40 Gbps
system throughput (20 Gbps ingress and 20 Gbps egress) while ensuring SDH/SONET-like performance and Five
Nines reliability.
ETX-220A can deliver IP VPN, VoIP, and dedicated Internet access over the same physical link as a Layer-2 LAN-to-LAN
service, all with differentiated quality of service and end-to-end monitoring.
RAD ETX-220A TYPICAL APPLICATIONS
ETX-220A can be used as follows:
Ethernet 10 GbE demarcation device ETX-220A can be used in a wholesale Ethernet environment to separate the
service provider network, the access
provider network, and the customer network, providing proactive service monitoring and easy fault localization
throughout the entire network. (see Figure 1)
3G/4G mobile demarcation device ETX-220A can be placed in the concentration point and support
hundreds of services and concurrent OAM sessions. (see Figure 2)
Dual chassis ETX-220A provides end-to-end traffic management and service control with redundancy (see
Figure 3).
ETX-202A Services
ETX-220A provides the following services:
Ethernet Private Line (EPL) ETX-220A provides site-to-site connectivity over
dedicated bandwidth without service multiplexing
Ethernet Virtual Private Line (EVPL) ETX-220A delivers site-to-site connectivity over shared bandwidth
with service multiplexing.
FLEXIBLE TRAFFIC MAPPING
Traffic is mapped to the Ethernet flows using very flexible classification criteria
that can be combined, for example:
Port-based (All-to-one bundling)
VLAN + VLAN priority
VLAN + IP precedence
VLAN + DSCP
Ether Type
IP/MAC source/destination address
UDP port
Untagged.
More classification criteria and combinations can be found in the user manual.
QOS USING THE ETX-220A FROM RAD
Different service types require different levels of QoS to be provided end-to-end.
QoS can be defined per subscriber as well
as per service. QoS has 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-configurable CIR + CBS and EIR + EBS.
Traffic can be limited to the line rate or the data rate.
For prioritizing user traffic, ETX-220A maps user traffic to up to eight separate
queues per service. 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 RAD ETX-220A uses the WRED policy to ensure that in case of congestion, green
packets are not dropped (yellow packets may be dropped).
HIERARCHICAL SCHEDULING AND SHAPING PER FLOW
Every flow per EVC or EVC.cos has its own queues and scheduler. ETX-220A supports
up to 320 flows, and a total of 64 queue blocks per network/user port, enabling shaping of the EVCs. Each queue block is a
group of eight queues per CoS.
ETX-220A COLOR-AWARE P-BIT RE-MARKING
The VLAN priority bit in Ethernet frames can be modified at network ingress according to the color of the frame. This
allows service consistency and QoS
continuity across color-aware (Drop Eligible-enabled) as well as color-unaware networks.
L2CP HANDLING
The device can be configured to pass through Layer-2 control frames (including other vendors L2CP frames) across the
network, to peer supported protocols
(IEEE 802.3-2005 and LACP), or to discard the L2CP frames.
RFC-2544
The ETX-220A provides a built-in RFC-2544 wirespeed traffic generator and analyzer
for unidirectional and bidirectional testing of throughput, latency, and frame loss.
The tests are performed over Layer-2, based on standard OAM messages, and can be performed for multiple flows.
LAYER-2/ LAYER-3 LOOPBACK WITH MAC AND IP ADDRESS SWAPPING
Layer-2 and/or layer-3 network integrity can be tested by a non-disruptive loopback performed per flow, with
swapping of MAC address and optionally
IP address. When the loopback is activated, ETX-220A exchanges the source and destination MAC/IP addresses of the
incoming packets. This loopback passes
through Ethernet bridges (MAC address) and routers (IP address).
JUMBO FRAMES AND EGRESS MTU
The RAD ETX-220A supports large frames of up to12 Kbytes.
Figure 2.
HARDWARE-BASED ETHERNET OAM
ETX-220A provides these types of Ethernet OAM:
Single-segment (link) OAM according to IEEE 802.3-2005 (formerly 802.3ah) for remote management and fault
indication, including remote loopback, dying gasp, and MIB parameter retrieval. Active and passive mode are
supported.
End-to-end connectivity OAM based on IEEE 802.1ag-D8 that enables Ethernet service providers to monitor their
services proactively and guarantee that
customers receive the contracted SLA
End-to-end service and performance monitoring based on ITU-T Y.1731. Fault monitoring and end-to-end
performance measurement include
frame delay, frame delay variation, frame loss and availability. Featuring ultra fast, hardware-powered
processing, ETX-220A performs OAM and
PM measurements in line rate with maximum precision, offering the following powerful benefits:
Immediate detection of loss of continuity (LOC), ensuring under 50 ms protection switching
Highly accurate frame loss measurements with live traffic testing
Flow-level monitoring, enabling simultaneous processing of hundreds of OAM sessions
Loopback testing at line rate.
MANAGED QOS IN NEXT-GENERATION RADIO ACCESS NETWORKS
ETX-220A delivers managed quality of service in next-generation radio access networks (RANs), allowing mobile
operators to enhance their 3.5G/4G
service performance by combining Ethernet aggregation with OAM and SLA enforcement capabilities.
ETX-220A FAULT PROPAGATION
The RAD ETX-220A provides a user-configurable fault propagation mechanism in the
network-to-user or user-to-network direction. When a link failure is detected
or OAM failure received, ETX-220A can shut down the affected port or forward the OAM failure message. The fault
propagation mechanism enables routers
and switches connected to both ends of the link to reroute the traffic to the redundancy path.
RAD ETX-220A NETWORK INTERFACE RESILIENCY
Flow-based resiliency on uplinks is provided, as well as G.8031 Ethernet linear protection on the network ports.
ETX-220A implements EPS Ethernet Path
protection according to ITU-T G.8031. The device protects one or multiple EVCs in the network via standard APS messages
and via OAM ETH AIS/LOC criteria, ensuring
protection switching under 50 msec. The protected EVC runs over one uplink or dual
uplinks per customer requirement. The protection is available for the
following topologies:
End-to-end EPS path protection for one or multiple EVCs transported over MPLS/VPLS access network
Opposite standard PE supporting G.8031 EPS. Additionally, the following protection
methods are provided via port-based resiliency on the network ports:
Link aggregation (LAG) based on 802.3ad with or without LACP
Dual homing (1:1), allowing ETX-220A to be connected to two different upstream devices.
DYING GASP
ETX-220A reports power failures to defined network management stations by sending an IEEE 802.3-2005 message or
SNMP trap, thus enabling the unit to
properly disconnect from the network with notification of the reason for the service problem.
ENVIRONMENT
ETX-220A/H is a temperature-hardened version with matching SFPs intended for industrial installations.
ETX-220A MANAGEMENT
The RAD ETX-220A can be managed using the following ports and applications:
Local management via an ASCII terminal connected to the RS-232 port
Remote inband management via Ethernet port routed via separate VLANs, Telnet, or an SNMP-based
management system
Out-of-band management via a dedicated management port
SFTP Secure File Transfer Protocol.
SECURITY
The following security protocols are provided by ETX-220A to ensure client server communication privacy and correct
user authentication:
SNMPv3
RADIUS (client authentication)
TACACS+ (client authentication and accounting)
SSH for Secure Shell communication session.
TRAP SYNCHRONIZATION
Traps are sent with sequence IDs to network manager groups, to enable the managers to detect when traps are lost
and request the traps be sent again.
DHCP
IP address, IP mask, and default gateway can be automatically obtained using DHCP.
COMMAND LINE INTERFACE
Databases and scripts of commonly used commands can be easily created and applied to multiple units using command
line interface.
ETX-220A product data sheet (pdf)
