Zte ZXR10 5250-28TC Technical specifications

ZXR10 5250 Product
Description

ZXR10 5250 Product Description
ZTE Confidential Proprietary
© 2013 ZTE CORPORATION. All rights reserved.
I
ZXR10 5250 Product Description
Version
Date
Author
Approved By
Remarks
V1.0
2011-07-25
Liusheng
Not open to the Third Party
V1.1
2012-12-05
Liusheng
ZHUOMUNIAO modification
© 2013 ZTE Corporation. All rights reserved.
ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be
disclosed or used without the prior written permission of ZTE.
Due to update and improvement of ZTE products and technologies, information in this document is
subjected to change without notice.

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TABLE OF CONTENTS
1Overview ......................................................................................................... 1
2Highlights........................................................................................................ 2
2.1 Energy saving and green.................................................................................. 2
2.2 Easy deployment and easy management.........................................................2
2.3 POE Features...................................................................................................3
2.4 Better video service experience........................................................................3
2.5 Perfect security design ..................................................................................... 3
2.6 Smart VLAN......................................................................................................4
2.7 Overall supervision...........................................................................................4
2.8 Bidirectional ACL..............................................................................................4
2.9 Precision user locating......................................................................................4
2.10 Ethernet OAM...................................................................................................5
2.11 Off-power alarm................................................................................................ 5
3Functions........................................................................................................ 6
3.1 Basic service functions.....................................................................................6
3.1.1 MAC address management.............................................................................. 6
3.1.2 VLAN................................................................................................................7
3.1.3 STP features.....................................................................................................8
3.1.4 Link aggregation...............................................................................................8
3.1.5 Basic Ethernet features ....................................................................................8
3.2 Value-Added Service (VAS)..............................................................................9
3.2.1 DHCP-based batch upgrade.............................................................................9
3.2.2 IPTV................................................................................................................. 9
3.2.3 ACL ................................................................................................................10
3.2.4 SFLOW........................................................................................................... 10
3.2.5 RSPAN........................................................................................................... 11
3.2.6 Global counter................................................................................................12
3.2.7 IP source guard..............................................................................................12
3.2.8 Dynamic ARP Inspection (DAI)....................................................................... 12
3.2.9 LLDP ..............................................................................................................13
3.2.10 UDLD .............................................................................................................13
3.2.11 Voice vlan....................................................................................................... 13
3.2.12 802.1x authentication......................................................................................13
3.2.13 Ring protection ...............................................................................................14
3.2.14 ZESS smart switching..................................................................................... 14
3.2.15 DHCP relay ....................................................................................................15
3.2.16 TACACS+.......................................................................................................15
3.2.17 SSH................................................................................................................16
3.2.18 Port loopback check ....................................................................................... 16
3.2.19 MButton.......................................................................................................... 16
4System Architecture..................................................................................... 17
4.1 Appearance.................................................................................................... 17
4.2 Hardware Architecture.................................................................................... 17
4.2.1 Overall Hardware Architecture........................................................................17

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4.2.2 Working Principle of Hardware System...........................................................18
4.2.3 Introduction to Card........................................................................................18
4.3 Software Architecture .....................................................................................20
4.3.1 Operation Support Sub-system.......................................................................20
4.3.2 MUX Sub-system............................................................................................21
4.3.3 L2 Sub-system................................................................................................22
4.3.4 NM and Maintenance Sub-system..................................................................22
5Technical Indexes and Specifications......................................................... 23
5.1 Physical Indexes.............................................................................................23
5.2 Basic Specifications........................................................................................ 23
6Operation and Maintenance......................................................................... 26
6.1 NetNumen U31 Integrated NM Platform .........................................................26
6.1.1 NM Networking...............................................................................................26
6.1.2 NetNumen U31 NM System............................................................................ 27
7Comprehensive Networking Applications .................................................. 30
7.1 Community Access for Enterprise network .....................................................30
7.2 Corridor Access for MAN................................................................................ 31
8Abbreviations................................................................................................ 32

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FIGURES
Figure 3-1 Typical QinQ networking.....................................................................................7
Figure 3-2 sFlow frame ......................................................................................................11
Figure 3-3 ZESS network topology.....................................................................................15
Figure 4-1 ZXR10 5252-28TC............................................................................................17
Figure 4-2 ZXR10 5252-52TC............................................................................................17
Figure 4-3 ZXR10 5250-28SM ...........................................................................................17
Figure 4-4 ZXR10 5250-52PM ...........................................................................................17
Figure 4-6 Working principle of the system.........................................................................18
Figure 4-7 Control principle................................................................................................19
Figure 4-8 System framework diagram...............................................................................21
Figure 4-9 L2 system structure...........................................................................................22
Figure 7-1 Desktop access for enterprise network..............................................................30
Figure 7-2 MAN access......................................................................................................31
TABLES
Table 5-1 Physical indexes ................................................................................................23
Table 5-2 System specifications.........................................................................................24
Table 8-1 Abbreviations .....................................................................................................32

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ZXR10 5250 Product Description
1 Overview
As a new-generation GE access L2 Ethernet intelligent switch introduced by ZTE, ZXR10
5250 series enhances its features in energy saving, user information security, access
control as well as management and maintenance. 5250 when compared with similar
products are outstanding for its powerful forwarding capability, flexible ACL and rich
monitoring manners. It supports Ethernet OAM and voice vlan, so that is can satisfy MAN
and enterprise network access needs.
ZXR10 5250 include 4 models: ZXR10 5250-28TC, ZXR10 5250-52TC, ZXR10
5250-28SM and ZXR10 5250-52PM

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2 Highlights
2.1 Energy saving and green
ZXR10 5250 perfectly supports 802.3az. It can dynamically set port as idle when there’s
no traffic goes through so as to save the power. It functions well to save the consumption
at single port by reducing 70% consumption at single port. Meanwhile, the device can
provide the statistics of consumption saved by the port and the device so as to provide a
practical effect of energy saving to the customer.
ZXR10 5250 supports dynamic fan adjustment. It can adjust fan speed dynamically
based on the temperature inside the equipment. It raises the fan speed and increases air
flow when the temperature is high. It reduces fan speed when the temperature is low.
By using multiple energy-saving technologies, for example, disable idle ports and adjust
port power consumption as per cable length, ZXR10 5250 try their best to decrease the
power consumption for the customer maximally.
The material used for the product conforms to Europe RoHS environment protection
standard. The environment pollution of the materials is reduced to the least. We make
certain contribution to protection of the whole environment.
2.2 Easy deployment and easy management
Automatic remote batch upgrade can upgrade the equipment of the same type at one
time, which avoids the hardship of the OAM staff going up and down the building carrying
their computers.
Creative M-Button enables the administrator to obtain the status of equipment port,
memory and CPU without logging in the system.
It supports system information display. Via one command, the system operation
information can be collected, which gives conveniences to information collection and
failure location.
It supports off-power warning. When the device is out of power, it is still capable of
sending off-power warning to remote server. In this way, the administration center can be
informed of the failure in the shortest time.
At the same time, the device supports multiple management manners, e.g., web, telnet
and snmp, etc. Also, the equipment can carry out local or remote authority authentication
to guarantee the reliability of the operation.

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2.3 POE Features
ZXR10 5250 series supports full-port POE and POE+ power supply, conforming to
802.3af and 802.3at standard. It is also compatible with PD equipment which doesn’t
conform to 802.3af or 802.3at standard. The maximal power supply of POE is 15.4W and
the maximal power supply of POE+ is 30W.
The port supports time-sharing POE power supply configuration. It can automatically
forcefully shut down POE power supply of the electrical interface during the period when
power supply is unneeded.
2.4 Better video service experience
ZXR10 5250 supports MVR, provides various rules and channel combination, and
supports multicast QoS. It solves traffic engineering management problem brought by
multiple egress duplication of multicast services, optimizes delay, jitter and packet loss
problem of video flow, and reduces join-in and offline delay of users’video services. At
the same time, it supports multicast service access control, which guarantees security of
multicast service access and users’high-quality video service experience.
2.5 Perfect security design
The security design of ZXR10 5250 is based upon two aspects: one is to guarantee the
normal operation of the device, the other is to ensure the security of the data.
For self security design, some restrictions to peer-end broadcasting message, multicast
message, unknown unicast message. Therefore, these messages will have less impact
to CPU. For CPU, the device uses control plane security service to classify and control
the speed of the protocol messages that CPU needs to process. This mechanism makes
sure that the speed of the delivered the message for the protocol stacking is within a
proper range, which avoids the breakdown of CPU caused by exceeding messages.
Besides common user name and password management, ZXR10 5250 supports multiple
logins such as SSH to prevent the administrative users being spoofed.
For user data security, besides PVLAN service, ZXR10 5250 also uses DHCP snooping
plus IP source guard to make sure user’s validity. For the messages which do not satisfy
bounding table, they will be discarded.
The device is also capable of DAI service. So that it can effectively restrict ARP-based
DOS attack. The device not only can discard arp message which does not accord with
the condition, but also can restrict the number of arp one port learns. This mechanism
successfully prevents equipment table entity from being occupied maliciously, which
makes sure other people can use the resource normally.

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2.6 Smart VLAN
ZXR10 5250 not only gives support to 1:1 vlan map, but also supports N: 1 VLAN map.
In this way, by aggregating vlan at the access side, the device greatly enhances the
usability of vlan resource.
ZXR10 5250 supports standard QinQ service and flexible SVLAN service, which enables
the operator to distinguish user and service at the access side effectively. In this way, the
units can implement different processing policies as per different users and services.
ZXR10 5250 supports dynamic distribution of independent vlan to voice device, and
provide higher priority to data in this vlan by configuring QoS strategy to guarantee voice
quality.
2.7 Overall supervision
ZXR10 5250 supports message mirroring service. It can classify mirroring image
of different messages, so that different message mirroring image can go to
different port.
ZXR10 5250 supports sFlow service. It can sample the message and send it to
the designated server.
ZXR10 5250 support RSPAN service. It is used for the extension of common
mirroring. So that, all the messages on the monitored port will be completely sent
to the remote receiver.
The device also supports intelligent statistic service. Being different from the
traditional accounting service which can only collect the number of the port or
queue, the intelligent statistic service can count any interested traffic or port. The
counting service can be as precise as one user‘s one service, which accordingly
provides effective monitoring way for precise operation.
2.8 Bidirectional ACL
In the course of further developing similar products, ZXR10 5250 at the same time
supports incoming and outgoing ACL. User can implement both incoming and outgoing
traffic classification and speed restriction at the same time. This mechanism enables
more comprehensive and flexible ACL.
2.9 Precision user locating
Via multiple methods like DHCP, option82, PPPOE+ and VBAS, ZXR10 5250 can
provide user’s accurate location for the network management center. The field with user
location information can be configured freely to meet different operators’ requirements.

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ZXR10 5250 Product Description
2.10 Ethernet OAM
Ethernet Operations, Administration, and Maintenance (OAM) is a guarantee to provide
high-quality carrier-class network. It monitors link status change, makes evaluation of
service quality provided by the link, so as to provide great convenience for network
maintenance staff to locate network failures. ZXR10 5250 supports three OAM protocols:
802.1ag, 802.3ah, and Y1731.
2.11 Off-power alarm
When the power supply is off-power, the device sends alarm message to the designated
server, notifying the server that the device stops working because the power supply is off.
Power supply failure is the major failure of the access device. This function can help OAM
staff to make quick decision on device failure and speed up the processing and failure
recovery.

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3 Functions
3.1 Basic service functions
3.1.1 MAC address management
ZXR10 5250 series fulfills the following MAC functions:
Convert dynamic MAC address into static one
On one hand, the administrator expects that the user is fixed only to a port; on the other
hand, he does not want to configure too many static addresses. The function can be used
to reach the goal.
Bind MAC address to a port
Dynamic, static or permanent MAC address can be added to MAC address table. The
correspondence relation between static or permanent MAC address and port is fixed, and
cannot be cancelled until the address is deleted manually.
Limit MAC address number of a port
MAC address table capacity of a switch is limited. When many users are available and
MAC address table will reach the capacity limit, the MAC address number of low-priority
user port will be restricted.
The restriction can prevent MAC address broadcast to drive MAC address table to
overflow the network attack.
Port MAC address learning protection
When abnormal MAC address learning of a port is checked out, the switch will protect the
MAC address learning for some time. New address learning cannot be done in the
protection. When the protection expires, the port will be in the state of MAC learning
again.
Unknown-source MAC address filtering of a port
Unknown-source MAC address filtering of a switch port is closed by default, and the port
does not filter the unknown-source MAC address. If a switch port is configured with
enabling the unknown-source MAC address filtering, relative port will discard the packet
of unknown-source MAC address received at the port and learn it.
MAC address filtering

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ZXR10 5250 Product Description
Data frame can be filtered according to MAC address in the following ways:
1 Only the source MAC address of data frame is matched. If the source MAC
address is the set MAC address, the data frame will be filtered.
2 Only the destination MAC address of data frame is matched. If the destination
MAC address is the set MAC address, the data frame will be filtered.
3 The source or destination MAC address of data frame is matched. If the source
or destination MAC address is the set MAC address, the data frame will be
filtered.
3.1.2 VLAN
Support port-based vlan, 1:1 and N:1 vlan translation, PVLAN, QinQ and SVLAN.
QinQ, known as the tunnel protocol based on IEEE 802.1Q encapsulation, is also called
VLAN stack. QinQ adds a VLAN label (external label) outside the existing VLAN label
(internal label). The external label can shield the internal label.
QinQ without protocol support can implement simple L2VPN, and is suitable for mini-
LAN taking L3 switch as the backbone.
Typical QinQ networking is as follows. The port connecting user network is Customer port,
the port connecting SP network is Uplink port, and SP network edge access equipment is
called PE (Provider Edge).
Figure 3-1 Typical QinQ networking
Switch A
PE Switch B
PE
SPVLAN 10
Uplink port
SPVLAN 10
Uplink port
SP network
SPVLAN 10
customer
port
SPVLAN 10
customer
port
User network
1
CVLAN1-
100 User network
2
CVLAN1-
100
User network accesses PE via Trunk VLAN. Uplink ports in SP network are connected
symmetrically via Trunk VLAN.
When the packet comes from user network 1 to switch A customer port, no matter
whether the packet is tagged or untagged, switch A will forcedly insert the external label
(VLAN ID is 10). In SP network, the packet reaches switch B via VLAN 10 ports. Switch B

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finds out the port connected to user network 2 is customer port, removes the external
label according to the conventional 802.1Q protocol, restores it to the original packet, and
sends it to user network 2.
The data between user network 1 and 2 can be transmitted transparently via SP network.
User networks can freely plan their own private network VLAN ID to avoid the conflict with
SP network VLAN ID.
3.1.3 STP features
Support RSTP and MSTP as well as such protection features as bpdu guard, root guard
and loop guard.
3.1.4 Link aggregation
Link aggregation, known as Trunk, binds several physical ports into one logic port to
share incoming/outgoing traffic load among member ports. The switch decides according
to port load sharing policy configured by the user via which member port the packet is
sent to the opposite switch. When detecting that a fault occurs to the link of a member
port, the switch will stop sending the packet via the port, and recalculate and decide a
port for packet transport according to load sharing policy. After the faulty port restores,
the switch will recalculate and decide a port for packet transport again. Link aggregation
is an important technology to increase link bandwidth and support link transport resilience
and redundancy.
ZXR10 5250 supports static Trunk and LACP link aggregation.
Static Trunk adds several physical ports directly to Trunk group to form one logic port, but
it is not good at observing the status of link aggregation port.
LACP (Link Aggregation Control Protocol), following IEEE 802.3ad, dynamically
aggregates several physical ports into Trunk group through the protocol to form one logic
port. LACP automatically aggregates to get the maximum bandwidth.
3.1.5 Basic Ethernet features
ZXR10 5250 supports the following basic Ethernet features:
Support port mirroring
Port mirroring copies the data of one or several switch ports (mirrored port) to one
designated destination port (monitored port) to get the data of the monitored port for
traffic analysis and wrong diagnosis port data. The mirroring (RSPAN) of
cross-equipment ports is supported.
Support broadcast storm suppression

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It can limit the number of broadcast packet allowed to pass Ethernet port per second.
When broadcast traffic exceeds the value set by the user, the system will discard
broadcast traffic, thus broadcast traffic will be reduced to a reasonable range to suppress
broadcast storm and avoid network congestion to assure network services of normal
operation. Broadcast storm suppression takes the set rate as the parameter. The smaller
rate means the smaller broadcast traffic allowed to pass.
Support such configuration as port rate, duplex mode and adaptation.
Support line diagnosis analysis and test
ZXR10 5250 supports cable line diagnosis analysis and test. It can check line and
connection and find the location of cable fault to facilitate network management and fault
locating.
GE electrical interface is connected to other devices via network cable. Network cable
has 4 twisted pairs. 100M network cable uses twisted pair 1-2 and 3-6, and 1000M 1-2,
3-6, 4-5 and 7-8. The status of each twisted pair can be detected in line check. Line
statuses are as follows:
1 Open: Open-circuit line
2 Short: Short-circuit line
3 Good: Normal line
4 Broken: Open-circuit or short-circuit line
5 Unknown: Unknown or no result
6 Crosstalk: Line coupling
7 Fail: Failed detection
3.2 Value-Added Service (VAS)
3.2.1 DHCP-based batch upgrade
ZXR10 5250 supports the DHCP-based batch upgrade. By supporting DHCP option66,
67 and 150, the device gets the server address, catalog and filename storing the version.
Option150 stores the server IP address, option66 the version path, and option67 the
version filename. With the information, the device can automatically get the version from
the designated location via FTP or TFTP, which simplifies upgrade procedure, facilitate
operation & maintenance and increase working efficiency.
3.2.2 IPTV
IPTV, known as interactive network TV and launched by carriers based on broadband,
uses IP broadband network and integrates Internet, multimedia and telecom technologies

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to provide for the user such interactive services as live TV, video VOD and Internet
browse. The user gets the services via PC or “IP set top box+TV”.
Controllable multicast is one of key technologies of ZTE’s IPTV system structure, and
usually works at the broadband access network side. The equipment (BRAS, access
equipment or switch) implementing the multicast control policy is called the multicast
control point. As the termination point of user multicast IGMP request, the multicast
control point decides according to relative IGMP request and control policy whether to
copy multicast flow to user port. The closer the multicast control point is, the more
network bandwidth the user can save. As the key equipment to implement the multicast
control policy, Multicast control point supports the following services: IGMP V1/V2，
IGMP Snooping, IGMP Filter, IGMP Proxy, IGMP Fastleave, MVR(Multicast Vlan
Register), SGR(Static Group Register), UGAC(User Group Access Control) and
UGAR(User Group Access Record). User’s on-demand authority can be controlled by
binding rules and channels.
3.2.3 ACL
ZXR10 5250 supports egress and ingress ACL.
ZXR10 5250 offers the following four types of ACL.
Basic ACL: Only match source IP address.
Extension ACL: Match source IP address, destination IP address, IP protocol type,
TCP source port No., TCP destination port No., UDP source port No., UDP
destination port No., ICMP type, ICMP Code, DSCP (DiffServ Code Point), and
ToS.
L2 ACL: Match source MAC address, destination MAC address, source VLAN ID,
L2 Ethernet protocol type, and 802.1p priority value.
Mixed ACL: Match source MAC address, destination MAC address, source VLAN
ID, source IP address, destination IP address, TCP source port No., TCP
destination port No., UDP source port No., and UDP destination port No.,
including all matching fields of the above types.
3.2.4 SFLOW
sFlow is the IETF standard traffic monitoring technology. It has low hardware
requirements, less equipment resource consumption and high technical commonality, so
it is now used by multiple vendors.
sFlow service mainly consists of three parts: sFlow message sampling unit, sFlow proxy
unit and sFlow collector (or named analyzer ). The sampling and proxy units of sFlow are
integrated in the network equipment; while sFlow collector which analyzes messages of

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ZXR10 5250 Product Description
multiple sFlow proxies is out of the system structure. The entire basic system architecture
is as shown in the following figure:
Figure 3-2 sFlow frame
sFlow sampling unit is the basis of sFlow mechanism. sFlow samples network packets
at the network interface supporting sFlow and sends sampled packets to sFlow agent
equipment for processing. sFlow Collector is the network equipment sFlow uses to
manage, monitor, collect and analyze. It stores and analyzes network packets from sFlow
Agents, and gives equipment traffic and service analysis reports and tables.
3.2.5 RSPAN
Remote Switched Port Analyzer (RSPAN), i.e. remote port mirroring, without asking the
mirrored port and the mirroring port on the same switch, enables cross-network mirrored
port and mirroring port. This gives great conveniences to the administrator for remote
switch management.
The following switches can fulfill the RSPAN function.

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Source switch: The switch of the monitored port makes L2 forwarding of the traffic,
which needs to be mirrored, at Remote-probe VLAN L2 and forwards it to
intermediate switch or destination switch.
Intermediate switch: The switch between source switch and destination switch in
the network transports the mirroring traffic to the next intermediate switch or
destination switch via Remote-probe VLAN. If source switch and destination
switch are directly connected, there will be no intermediate switch.
Destination switch: The switch of destination port for remote mirroring forwards
the mirroring traffic received from Remote-probe VLAN to the monitoring
equipment via the mirroring destination port.
3.2.6 Global counter
ZXR10 5250 has unique global counter. The port and flow to be monitored can be bound
to a separate global counter. The specific flow can be decided according to flow
classification. For example, monitor a specific source IP and destination IP. After binding,
global counter separately counts the packets matching the flow.
Global counter provides the carriers with an effective way to monitor network traffic status,
which may be for a specific traffic of each user, so as to offer more data for network
structure planning.
3.2.7 IP source guard
IP source guard is a policy control technology. Based upon dynamic DHCP snooping
table entry or manual static table entry, it is mainly responsible for checking if IP+MAC
the same as DHCP snooping table entry or manual static table entry. If they are not the
same, the message will be judged as illegal. Then it will be discarded or sent to CPU.
3.2.8 Dynamic ARP Inspection (DAI)
ARP attack is the most commonly seen means in the network. It has two ways: One is to
transmit a lot of ARP packets which is beyond normal processing capability and break
down the equipment; the other is to transmit faked ARP packets and make the equipment
learn wrong table items, thus the packets of a normal user are wrongly forwarded to the
hacker faking the ARP packets and let him get private information of the user.
DAI service can effectively process ARP attack. After initiating DAI, the equipment can
restrict the number of ARP sent by the port, which guarantees adequate processing
capability of the equipment. Also, DAI service can check the legality of the received ARP
message according to user table entry generated dynamically. When the received ARP
message does not accord with the user dynamic table entry of this port, this message will
be dropped to make sure the correctness of the forwarding table entry.

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ZXR10 5250 Product Description
3.2.9 LLDP
LLDP (Link Layer Discovery Protocol) is a kind of neighbor discovery protocol. With LLDP,
network device notifies its information to other devices and establish neighbor
relationship with different devices. ZXR10 5250 supports multiple LLDP TLV attributes. It
can correctly notify its port and system information to its neighbors.
At the same time ZXR10 5250 supports LLDP MED (LLDP for Media Endpoint Devices).
The switch uses this protocol to configure the terminal device that connected to it.
3.2.10 UDLD
UDLD is a L2 network protocol used to detect the single-pass on physical link between
the devices. Sometimes only receiving is normal or only transmitting is normal on the
physical link between two devices. At this time, the link status may be normal but the
packet transmission is abnormal. Detecting the abnormality, UDLD can send alarm or
close the port, which is decided based on the configuration.
3.2.11 Voice vlan
Voice VLAN provides high forwarding priority for voice data packet. When voice device
access is detected, no matter what the default priority for the voice data flow is, ZXR10
5250 transfers the legal voice data to the specified voice VLAN and distributes a high
priority to it, so as to guarantee the voice packet is forwarded with priority.
3.2.12 802.1x authentication
DOT1X (IEEE 802.1x) is the port-based network access control protocol. It optimizes
authentication means and authentication architecture and resolves the issues caused by
conventional PPPoE and Web/Portal authentication, so it is more suitable for broadband
Ethernet.
IEEE 802.1x protocol architecture consists of three major parts: Supplicant System,
Authenticator System and Authentication Server System.
1 Supplicant system is a user terminal system which is usually installed with a
supplicant software. The user starts the software to initiate the authentication in
IEEE802.1x protocol. In order to support the port-based access control,
supplicant system needs to support EAPOL (Extensible Authentication Protocol
Over LAN).
2 Authenticator system is usually the network equipment supporting IEEE802.1x
protocol, such as switch. The equipment corresponds to the ports of different
users (They may be physical ports, or MAC address, VLAN and IP of user
equipment). Two logic ports are available: controlled port and uncontrolled port.

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1) Uncontrolled port is always in bidirectional connection status and transmits
EAPOL protocol frame to ensure that the supplicant can always send or
receive the authentication.
2) Only when the authentication is passed, can controlled port be opened to
transmit network resource and service. Controlled port can be configured to
bidirectional control or input control for different applications. If the user
does not pass the authentication, controlled port will be in authentication
status, and the user will not access the service provided by authenticator
system
3 Authentication server is usually RADIUS server. It can store the user-related
information, e.g., user VLAN, CAR parameters, priority, and user access control
list. When the user passes the authentication, authentication server passes the
user-related information to authenticator system which creates the dynamic
access control list, and subsequent user traffic will be under the supervision of
the above parameters. Device communicates with RADIUS server through
RADIUS protocol.
3.2.13 Ring protection
ZTE Ethernet Smart Ring (ZESR) based upon EAPS principle of rfc3619 protocol makes
some progresses. It makes sure if the ring works smoothly. Also it confirms there’s only
one logic smooth path between two nodes. The port status can be changed between
block and forward status according to the situation of the ring (through-break,
break-through), which enables fast switchover of the logical path.
ZESR supports multiple such as network topologies as tangent ring and intersectant ring
as well as multi-domain configuration. ZXR10 5250 ZESR supports to work with PVLAN
to comply with MEF networking model.
3.2.14 ZESS smart switching
ZTE Ethernet Smart Switch (ZESS), providing an Ethernet intelligent switchover
technology introduced by ZTE, describes a highly efficient link switchover mechanism.
When the active link breaks down, traffic can be switched over to the standby link, which
makes sure normal data transmission.
As shown in Figure 3, node 1 supports ZESS. Port 1 is master port and port 2 is slave
port. When node 1 finds that master port and slave port are UP, the protection service
VLAN forwarding of slave port will be blocked. When node 1 finds that master port is
DOWN, the protection service VLAN forwarding of master port will be blocked, and the
protection service VLAN forwarding of slave port will be opened. When node 1 finds that
master port restores to UP, inversion and non-inversion modes are available. In inversion
mode, master port is opened and slave port is blocked again. In non-inversion mode,