Zte ZXR10 8900E series Technical specifications

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ZXR10 8900E
series Core
Switch Product Description

ZXR10 8900E series Core Switch Product Description
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ZXR10 8900E series Core Switch Product Description
Version Date Author Approved By Remarks
V1.00 2011-03-25 Li Ying Shen Chunsheng Not open to the Third Party
V1.01 2012-6-13 Li Ying Huang HongRu Delete wrong description
V1.02 2012-10-10 Li Ying Huang HongRu
Add new function in version
3.00.02 including VSC、L2PT、
MFF and so on. Modify the
description about main control
board and interface board.
Update IPv6 function.
2012-11-16 Li Ying Huang HongRu Update：The description error
2013-02-19 Li Ying Huang HongRu Update：The description about
software load and unload
© 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........................................................................................................3
2.1 Super Big capacity/ High Density Interfaces .....................................................3
2.2 VSC Construct Solid Cloud Core......................................................................3
2.3 Distributed Module Operating System ROS 5.0................................................3
2.4 Multi-service Bearing Capabilities.....................................................................4
2.5 Comprehensive IPv6 Features .........................................................................4
2.6 Multi-Dimensional Security & Reliability Mechanism Guarantees Ever-online
Services...........................................................................................................4
2.7 Environment-friendly Innovations......................................................................5
3Function introduction.....................................................................................6
3.1 L2 function........................................................................................................6
3.1.1 Basic Ethernet features ....................................................................................6
3.1.2 VLAN and relative features...............................................................................7
3.1.3 Link aggregation.............................................................................................11
3.1.4 Spanning tree.................................................................................................13
3.1.5 L2 multicast ....................................................................................................15
3.1.6 L2PT...............................................................................................................16
3.2 L3 function......................................................................................................17
3.2.1 IPv4 route protocol..........................................................................................17
3.2.2 Ipv6 Routing ...................................................................................................20
3.2.3 IPv4/IPv6 Transition........................................................................................20
3.2.4 L3 Multicast ....................................................................................................21
3.2.5 Controllable Multicast .....................................................................................23
3.2.6 MCE ...............................................................................................................25
3.3 MPLS VPN .....................................................................................................26
3.3.1 Basic Functions of MPLS................................................................................26
3.3.2 MPLS TE........................................................................................................29
3.3.3 MPLS L2 VPN ................................................................................................30
3.3.4 MPLS L3 VPN ................................................................................................34
3.4 QoS................................................................................................................35
3.4.1 Basic QoS ......................................................................................................35
3.4.2 MPLS QoS .....................................................................................................40
3.5 OAM...............................................................................................................41
3.5.1 Ethernet OAM.................................................................................................41
3.6 Clock synchronization.....................................................................................42
3.6.1 Clock source...................................................................................................42
3.6.2 Synchronous Ethernet....................................................................................42
3.6.3 IEEE 1588 v2..................................................................................................43
3.6.4 Clock protection..............................................................................................44
3.7 Reliability protection........................................................................................45
3.7.1 Equipment-level protection .............................................................................45
3.7.2 Network detection mechanism........................................................................46
3.7.3 VSC................................................................................................................48
3.7.4 Ethernet intelligent protection .........................................................................49

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3.7.5 L3 route protection..........................................................................................52
3.7.6 VPN Protection...............................................................................................53
3.7.7 FRR Protection...............................................................................................56
3.8 Security and Authentication............................................................................60
3.8.1 ACL ................................................................................................................60
3.8.2 Device Authentication.....................................................................................61
3.8.3 Access Security..............................................................................................63
3.8.4 MFF................................................................................................................65
3.8.5 Network Security ............................................................................................66
3.9 Network Traffic Analysis .................................................................................68
3.9.1 Sflow ..............................................................................................................68
4System Architecture.....................................................................................70
4.1 Appearance....................................................................................................70
4.1.1 ZXR10 8912E Appearance.............................................................................70
4.1.2 ZXR10 8908E Appearance.............................................................................72
4.1.3 ZXR10 8905E Appearance.............................................................................74
4.1.4 ZXR10 8902E Appearance.............................................................................76
4.2 Hardware Architecture....................................................................................76
4.2.1 Overall Hardware Architecture........................................................................77
4.2.2 Working Principles of Hardware System.........................................................79
4.3 Hardware Boards............................................................................................81
4.3.1 Switching Main Control Board.........................................................................81
4.3.2 Power Module.................................................................................................88
4.3.3 Interface Module.............................................................................................89
4.4 Software Architecture .....................................................................................92
4.4.1 System Software Architecture.........................................................................92
4.4.2 Software Platform...........................................................................................94
5Technical Specifications..............................................................................98
5.1 Basic features.................................................................................................98
5.2 Interface Specifications...................................................................................99
5.3 Functions......................................................................................................101
5.3.1 L2 features ...................................................................................................101
5.3.2 L3 features ...................................................................................................102
5.3.3 Multicast features .........................................................................................102
5.3.4 MPLS ...........................................................................................................102
5.3.5 QoS..............................................................................................................103
5.3.6 Service Management....................................................................................104
5.3.7 Reliability......................................................................................................104
5.3.8 System security............................................................................................105
5.3.9 Clock synchronization...................................................................................106
5.3.10 Operating and Maintenance..........................................................................106
6Typical Networking Mode...........................................................................108
6.1 Application in Metro Ethernet........................................................................108
6.2 Application in Data Center............................................................................109
6.3 Application in Campus Network....................................................................110
6.4 Application in FTTx.......................................................................................111
6.5 Application in IP RAN ...................................................................................112

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7Operation and Maintenance....................................................................... 113
7.1 NetNumen U31 Unified Network Management Platform ............................... 113
7.1.1 Network Management Networking Mode......................................................113
7.1.2 NetNumen U31 Network Management System.............................................114
7.2 Maintenance and Management ....................................................................116
7.2.1 Multiple Configuration Modes .......................................................................116
7.2.2 Monitoring and Maintenance.........................................................................117
7.2.3 Software Upgrade.........................................................................................118
7.2.4 File System Management.............................................................................118
8Glossary......................................................................................................120

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FIGURES
Figure 1-1 ZXR10 8900E series product appearance...........................................................2
Figure 3-1 MC-ELAM structure...........................................................................................13
Figure 3-2 L2TP Networking.............................................................................................16
Figure 3-3 Architecture of MCE..........................................................................................25
Figure 3-4 MPLS working principle.....................................................................................27
Figure 3-5 MPLS header structure.....................................................................................28
Figure 3-6 Basic VPWS network model..............................................................................30
Figure 3-7 Basic VPLS network model...............................................................................32
Figure 3-8 H-VPLS networking with U-PW access.............................................................32
Figure 3-9 H-VPLS networking with QinQ access..............................................................33
Figure 3-10 Basic BGP MPLS VPN network model............................................................34
Figure 3-11 end to end MPLS QoS ....................................................................................41
Figure 3-12 SyncE synchronization....................................................................................43
Figure 3-13 IEEE 1588 synchronization.............................................................................44
Figure 3-14 SQA association .............................................................................................48
Figure 3-15 VSC system logic connection diagram............................................................48
Figure 3-15 ZESR break alarm...........................................................................................49
Figure 3-16 ZESS protection mechanism...........................................................................51
Figure 3-17 ZESR+ working principle.................................................................................51
Figure 3-18 PW single-hop redundancy protection.............................................................54
Figure 3-19 PW multi-hop redundancy protection ..............................................................54
Figure 3-20 CE dual-homing to PE.....................................................................................55
Figure 3-21 UPE dual-homing to NPE................................................................................56
Figure 3-22 Route switching diagram.................................................................................56
Figure 3-23 Label switching diagram..................................................................................57
Figure 3-24 TE FRR local link and node protection............................................................58
Figure 3-25 CE dual-homing model....................................................................................59
Figure 3-26 Multi-Level Processing Procedure......................Error! Bookmark not defined.
Figure 3-27 sFlow Multi-level Architecture..........................................................................69
Figure 4-1 ZXR10 8912E appearance................................................................................71
Figure 4-2 ZXR10 8912E structure.....................................................................................72
Figure 4-3 ZXR10 8908E appearance................................................................................73

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Figure 4-4 ZXR10 8908E structure.....................................................................................74
Figure 4-5 ZXR10 8905E appearance................................................................................75
Figure 4-6 ZXR10 8905E structure.....................................................................................75
Figure 4-7 ZXR10 8902E appearance................................................................................76
Figure 4-8 ZXR10 8902E structure.....................................................................................76
Figure 4-9 ZXR10 8912E/8908E/8905E hardware system architecture..............................77
Figure 4-10 ZXR10 8902E hardware system architecture..................................................77
Figure 4-11 ZXR10 8905E/8908E/8912Esystem hardware diagram ..................................80
Figure 4-12 ZXR10 8902E system hardware diagram........................................................80
Figure 4-13 Principle diagram of 8912E/8908E/8905E main control board.........................81
Figure 4-14 Principle diagram of 8902E main control board...............................................81
Figure 4-15 8912EMSC1D main control board panel diagram ...........................................84
Figure 4-16 8912EMSC1A main control board panel diagram............................................85
Figure 4-17 8908EMSC1D main control board panel diagram ...........................................85
Figure 4-18 8905EMSC1D main control board panel diagram ...........................................85
Figure 4-19 8902EMSC1D main control board panel diagram ...........................................85
Figure 4-20 8902EMSC1A main control board panel diagram............................................86
Figure 4-21 8912E/8908E/8905E DC power board diagram...............................................88
Figure 4-22 8912E/8908E/8905E AC power board diagram...............................................89
Figure 4-23 8902E DC power board diagram.....................................................................89
Figure 4-24 8902E AC power board diagram.....................................................................89
Figure 4-25 E1GF24A........................................................................................................91
Figure 4-26 H2GF24D........................................................................................................91
Figure 4-27 H2GF48D........................................................................................................91
Figure 4-28 H2GT48D........................................................................................................91
Figure 4-29 H2XF8D..........................................................................................................91
Figure 4-30 S1XF12A ........................................................................................................91
Figure 4-31 S2XF48A ........................................................................................................91
Figure 4-32 S2LQ6L2A ......................................................................................................92
Figure 4-33 8900E software system architecture ...............................................................93
Figure 4-34 New-generation ZXROS V5.0 software platform system architecture..............95
Figure 6-1 Application in metro network...........................................................................108
Figure 6-2 Application of Data Center ..............................................................................109
Figure 6-3 Enterprise network Application........................................................................110
Figure 6-4 FTTx Application.............................................................................................111

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Figure 6-5 Application in IP RAN......................................................................................112
TABLES
Table 4-1 Main control board panel interface features........................................................86
Table 4-2 Main control board panel button function description..........................................87
Table 4-3 Main control board panel indicator function description......................................87
Table 4-4 8900E interface board type ................................................................................90
Table 5-1 Basic features and performance.........................................................................98
Table 5-2 Interface Specifications......................................................................................99
Table 5-3 L2 features.......................................................................................................101
Table 5-4 L3 features.......................................................................................................102
Table 5-5 Multicast features.............................................................................................102
Table 5-6 MPLS feature...................................................................................................102
Table 5-7 QoS..................................................................................................................103
Table 5-8 Service Management .......................................................................................104
Table 5-9 Reliability..........................................................................................................104
Table 5-10 System security..............................................................................................105
Table 5-11 Clock synchronization ....................................................................................106
Table 5-12 Operating and Maintenance...........................................................................106
Table 8-1 Abbreviations ...................................................................................................120

ZXR10 8900E series Core Switch Product Description
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1
1 Overview
ZXR10 8900E switch is ZTE’s new generation enhanced core switch. With years of
experience in telecom network, ZTE designs and develops 8900E which has ultra-large
system capacity, ultra-high port density and ultra-strong service functions. It can address
immediate needs of metro network, data center network, campus network and enterprise
network for network core equipment.
Today, telecom network tends to larger user broadband, service bearing over IP and flat
network structure. Basic network is the uniform, converged and efficient platform bearing
various services. Because of large-scale growth of VOIP/IPTV/VIP access/3G services
and the introduction and deployment of IPv6 technology, there are higher requirements
for core /convergence switch. And the network is more complex, CAPEX and
maintenance cost remains high, more devices are in use, security and user experience
(UX) is difficult to improve. How to get out of these troubles is a hard nut for carriers and
network administrators.
ZXR10 8900E core switch with large capacity adopts distributed design to provide
high-density FE, GE and 40G/100G port, low-power-consumption component, innovative
fan and power supply. With physical port intelligent management mechanism, it expands
network capacity, increases convergence rate with low investment, reduces the cost per
user, saves the space in equipment room, and drops energy consumption. It offers
reliable equipment/link/network-level protection, and supports independent supervision
plane. Adopting reconfigurable design, the software supports multiple switching
technologies, and guarantees E2E service experience with multilevel QoS, and improves
network reliability and quality to bring down user maintenance cost. It supports
multiservice bearing, several clock synchronization technologies, IPTV, IPv6, and
all-directional security. It can bear data, video and voice services, and integrates the
characteristics of multiple network equipments to meet the requirements of different
networks and reduce CAPEX. It offers excellent performance and features to help the
users to build efficient, intelligent and reliable network.
ZXR10 8900E series include ZXR10 8912E, ZXR10 8908E, ZXR10 8905E and ZXR10
8902E, which have 12, 8, 5 and 2 service slots respectively. They have high-integration
interface boards and a wide variety of service functions. Their appearance is shown in
Figure 1-1.

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Figure 1-1 ZXR10 8900E series product appearance

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2 Highlights
2.1 Super Big capacity/ High Density Interfaces
With distributed modular design, non-blocking switching architecture, brand new
big-bandwidth fabric, ZXR10 8900E is an advanced core switch in the industry.
Each single slot of ZXR10 8900E can provide maximally 48*10GE interfaces or 8*40GE
interfaces. In the future 8900E will be able to be smoothly upgraded to provide 100G
interfaces.
2.2 VSC Construct Solid Cloud Core
ZXR10 8900E supports Virtual Switch Clustering (VSC), which means the virtualization of
multiple physical switches into one logical switch. VSC enhances cluster system capacity
and port density, while at the same time simplifies simple topology and eases
administration.
Multiple physical switches can be interconnected through the normal line cards. The
80KM interconnection capability makes it possible to implement remote IDC backup.
The bandwidth of the VSC interconnection can reach 320Gbps, eliminating any possible
bottleneck in the VSC system.
The forwarding inside VSC system is optimized so that there will be least amount of traffic
passing between VSC members.
Switchover between master and slave in VSC system is really fast and the switchover will
not cause any service interruption.
2.3 Distributed Module Operating System ROS 5.0
ZXR10 8900E adopts full-distributed modular design: each process enjoys its dedicated
resources alone; the coordination between processes is efficient and secure.
Each line card has its own CPU, while the main-control card is equipped with a more
powerful CPU. Distributed protocol processing helps promote the overall computing
efficiency.
The expansion of management interfaces is flexible. Currently ZXR10 8900E is
compatible with management interfaces Netconf.

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2.4 Multi-service Bearing Capabilities
ZXR10 8900E supports rich features, including full L2/L3 features, multicast, MPLS L2/L3
VPN, etc.
ZXR10 8900E supports complete L2/L3 multicast technologies, including administratively
scoped multicast, MVR, IGMP Snooping, Filtering, Proxy, Fast Leave, IGMP,PIM-DM/SM,
PIM-SSM, DVMRP and MSDP. All these features help Enterprise user to deploy
multicast applications such as video conferencing and video surveillances.
2.5 Comprehensive IPv6 Features
ZXR10 8900E supports comprehensive IPv6 features, to facilitate the migration to IPv6
network. For example, ZXR10 8900E supports all basic IPv6 features such as ICMPv6,
ND, SNMPv6, RADIUSv6; It also supports IPv6 routing protocols such as OSPFv3,
IS-ISv6, BGP4+, PIM-SM for IPv6, MLD snooping; Multiple tunnel technologies are also
supported including 6to4 tunnel, ISATAP tunnel, 6PE, etc.
2.6 Multi-Dimensional Security & Reliability
Mechanism Guarantees Ever-online Services
Security/Reliability related designs in ZXR10 8900E fall into five categories, which
are secure architecture, secure management and control, secure operating system,
secure calculation and reliable service.
Secure architecture: Redundant backup design has been put in place for the
forwarding control engines. Fast active/standby switchover is supported. Redundant
power supply module, fan module and clock module combined to make the switch
more robust. What’s more, ZXR10 8900E supports intelligent inspection, control,
warning and hot-swappable components.
Secure management and control: Independent control, monitoring and forwarding
planes guarantee superior equipment stability.
Secure operating system: ZXR10 8900E supports modular service, intelligent
function modules
Secure processing: Based upon multi-core CPU, ZXR10 8900E implements
multi-thread parallel high-performance processing to guarantee seamless
collaboration of multiple modules.
Reliable services: ZXR10 8900E supports multiple kinds of redundancy/backup
mechanisms including ZESR intelligent Ethernet smart ring, VRRP, LACP, FRR,
NSF and BFD.Service reliability can be well guaranteed.

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2.7 Environment-friendly Innovations
ZXR10 8900E supports multiple environmental-friendly innovations, including
centralized power management, 5 level intelligent fan speed adjustment. All these
environmental friendly designs help cut the power consumption.
ZXR10 8900E supports dying gasp, in case there is a power failure, 8900E can still
send out an alarm to the network OAM center, to inform about the reason of the
network break down. In this way, the time to do the trouble-shooting on these kinds
of events could be minimized.

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3 Function introduction
3.1 L2 function
3.1.1 Basic Ethernet features
3.1.1.1 MAC address management
As all forwarding tables of ZXR10 8900E are closely associated with MAC addresses,
MAC management is the most basic and most important module of Ethernet switch. It
can maintain MAC address learning and synchronization and complete the following
management function:
MAC address binding: Bind specific MAC address to switch port. After binding, do
not dynamic learn MAC, which will limit user physical location and protect important
MAC address.
MAC address filtering: After receiving the packets from source or destination MAC
address to specific MAC address, the switch discard some packets to filter some
undesired users.
MAC address number limit: Limit MAC address number of some ports to control
user number of some ports, and prevent system resources of running out when the
ports suffer from DOS attack.
MAC address freeze: Freeze some important physical ports in stable network, e.g.,
address of uplink port, so as to avoid network disconnection caused by the
infringement of key MAC address.
MAC address multi-angle display: Display and count VLAN table according to
VLAN, port, static and dynamic aspects, provide network diagnosis, and maintain
network operation.
3.1.1.2 Port mirroring
Port mirroring can automatically copy the traffic of one port to the port so that network
administrator makes real-time analysis on port traffic when he judges network issues. It
provides network administrator with a monitoring means. For ZXR10 8900E, any port can
be configured to mirroring port; the ports at different rate can mirror to each other;
many-to-one, one-to-many and many-to-many port mirroring can also be done. The
equipment supports cross-card port mirroring, and simultaneous mirroring of several

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mirroring group. It supports port-based mirroring as well as flow-based and ACL-based
one-to-many, many-to-one, and many-to-many mirroring.
ZXR10 8900E can perform port mirroring in the same equipment, and remote port
mirroring in RSPAN and ERSPAN. For RSPAN, mirroring port and mirrored port may be
in different switches. In some cases, monitoring equipment and switch are physically far
away from each other, so a remote span technology is needed for monitoring. RSPAN
monitoring principle is: set RSPAN source port at source switch, configure remote VLAN,
and send it out via Reflector port to reach destination switch via intermediate switch;
configure destination port at destination switch to reach remote monitoring destination.
ERSPAN (Encapsulated Remote SPAN), another remote port mirroring technology,
adopts GRE tunnel to encapsulate service stream of source port and transport it to
remote destination switch port. In the mirroring mode, data stream can fulfill the mirroring
across L3 interface, and ordinary SPAN and RSPAN can only fulfill the mirroring across
L2 network.
3.1.1.3 Port security and protection
ZXR10 8900E supports port traffic control, broadcast storm suppression, whether to
allow jumbo frame to pass, and rate negotiation to effectively control port data traffic,
avoiding network blocking and ensuring normal operation of network services.
ZXR10 8900E can analyze line diagnosis, check whether line and line connection are
normal, and accurately locate line fault.
ZXR10 8900E can set some or all port to loop check, and not check by default. The
function can check user or switch loop of port connection to process the port so as to
avoid switch broadcast storm and limit the effect to a certain port.
ZXR10 8900E supports VLAN-based loop check. The loop check can be performed in
PVID VLAN or user-specified VLAN. One port supports the loop check of at most 8
VLANs at the same time.
The implementation principle of port loop check is that the port sends L2 multicast every
15 seconds; if there is a loop at a port, L2 multicast packet is returned to the port, thus it
can be judged that the loop is available.
3.1.2 VLAN and relative features
VLAN protocol, a basic protocol of L2 switching equipment, enables the administrator to
divide one physical LAN into several VLAN. Each VLAN has one VLAN ID which uniquely
identifies the VLAN. Several VLANs share the switching equipment and links of physical
LAN.

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Each VLAN is logically like one independent LAN. All frame traffic in one VLAN is limited
to the VLAN. Cross-VLAN access is made through L3 forwarding which will improve
network performance and reduce the entire traffic in physical LAN.
VLAN reduces network broadcast storm and increases network security and centralized
management control.
ZXR10 8900E supports 802.1Q VLAN. The untagged packet can be added with VLAN
tag based on subnet, protocol and port to support a wide variety of VLAN features.
According to 802.1Q VLAN protocol, 12-bit VLAN is limit to 4096 in number, which affect
some actual applications. 8900E has four extension modes: QinQ, PVLAN, VLAN
translation, and L3-related Super VLAN.
3.1.2.1 PVLAN
Private VLAN is a mechanism that provides additional Layer 2 traffic isolation between
ports within a regular VLAN. This feature places constrains on traffic flow between
specific ports in a VLAN. For instance, in an enterprise network, client ports can
communicate with server ports, but not among each other.
Private VLAN is port based and it can be enabled through PVLAN_ENABLE field in
PORT_TABLE for each port. There are three types of private VLAN ports:
Promiscuous port—a promiscuous port can communicate with all interfaces,
including the community and isolated ports within a private VLAN.
Isolated port—an isolated port has complete Layer 2 separation from all other ports
within the same private VLAN except for the promiscuous ports. Private VLANs
block all traffic to isolated ports except traffic from promiscuous ports. Traffic
received from an isolated port is forwarded only to promiscuous ports.
Community port—Community ports communicate among themselves and with the
promiscuous ports. These interfaces are isolated at Layer 2 from all other interfaces
in other communities or isolated ports within their private VLAN.
PVLAN can effectively ensure the communication security of network data. The user is
connected only to his default gateway. Without several VLAN and IP subnets, one
PVLAN can provide the connection with L2 data communication security. All users can
access PVLAN to connect default gateway without any access to other users in the
PVLAN. PVLAN ensure that the ports in one VLAN do not communicate with each other,
but the services can go through Trunk port. Thus, the users in one VLAN will not affect
each other because of service broadcast.
PVLAN does not need protocol message. It can be statically configure in ZXR10 8900E.

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3.1.2.2 VLAN Translation
VLAN translation is an extension of VLAN function. If a port of the switch starts VLAN
translation, the data stream from the port must be tagged packet. VLAN translation uses
PORT plus VLAN ID in tagged packet as the index to search in MAC –VLAN table and
get a new VID, then the traffic is switched in the new VLAN to translate data from one
VLAN to the other.
VLAN translation does not need protocol message. It can be statically configure in
ZXR10 8900E. It should be noticed that if VLAN translation is started, VLAN cannot be
divided based on MAC address; if VLAN is divided based on MAC address, VLAN
translation cannot be started.
In addition single tag conversion, 8900E uses VLAN translation and SVLAN to fulfill the
following functions:
1. If the incoming packet is single tagged, be able to add outer tag according to policy,
and modify outer tag’s 802.1P value according to inner tag’s 1P value, supporting
policy-based mapping or one-to-one mapping;
2. If the incoming packet is single tagged, be able to modify inner tag and add outer tag
according to policy, and modify inner and outer tag’s 1P value according to incoming
tag’s 1P value, supporting policy-based mapping or one-to-one mapping;
3. If the incoming packet is double tagged, be able to delete outer tag according to
policy;
4. If the incoming packet is double tagged, be able to delete outer tag, and modify
inner tag according to policy, and modify 1P value of the new inner tag according to
outer tag 1P value, supporting policy-based mapping or one-to-one mapping;
5. If the incoming packet is double tagged, be able to modify outer tag according to
policy, and modify 1P value of the new outer tag based on 1P value of the incoming
outer tag, supporting policy-based mapping or one-to-one mapping;
6. If the incoming packet is double tagged, be able to modify inner tag according to
policy, and modify 1P value of the new inner tag based on 1P value of the outer tag,
supporting policy-based mapping or one-to-one mapping;
7. If the incoming packet is double tagged, be able to modify inner and outer tag
according to policy, and modify 1P values of the new inner and outer tags according
to 1P value of the incoming outer tag, supporting policy-based mapping or
one-to-one mapping.
8. If the incoming packet is untagged, be able to add inner and outer tag according to
policy at one time.

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3.1.2.3 Super VLAN
Super VLAN can make the hosts, which are in the same physical switching equipment
but in different virtual broadcast domains, to locate in one IPv4 subnet and use one
default gateway. In one large-scale switching LAN, the mechanism has several
advantages over the traditional IPv4 addressing system. The biggest advantage is to
save address space occupancy in IPv4 system.
Super VLAN and sub VLAN can be used to divide VLAN again. One or several sub
VLANs belong to one Super VLAN and use its default gateway IP address, namely,
aggregate several sub VLANs into one Super VLAN and use the same IP subnet and
default gateway.
Super VLAN is a software function. Ethernet ASIC chip is transparent to the function and
switches data according to software module VLAN setting. Super VLAN does not need
protocol message. It can be statically configure in ZXR10 8900E.
3.1.2.4 QinQ
QinQ with the multilayer VLAN tag stack, refers to tunnel protocol based on 802.1 Q
encapsulation. The core idea is to encapsulate private network VLAN tag to public
network VLAN tag; the message with double-layer tag goes through backbone network to
offer the user with a simple L2 VPN tunnel. QinQ, a simple and manageable protocol,
does not need protocol message. It can be statically configure in ZXR10 8900E. It is
applied to convergence-layer switch which can use QinQ (with double tags) to increase
VLAN number in metro network.
In ZXR10 8900E software system, QinQ software functional module statically configures
QinQ, and then correctly set the chip. QinQ VLAN consists of the following types:
SVLAN (Service VLAN): The VLAN defined in backbone network;
CVLAN (Customers VLAN): User-defined VLAN.
QinQ software functional module adds an attribute to the VLAN table. The attribute
indicates that the VLAN is SVLAN or CVLAN, and drive interface function at the lower
layer to set the QinQ function of the interface.
Ordinary QinQ only adds one outer tag to the datagram of a port, which greatly limits
networking flexibility. For the flow received from one port, SVLAN (Selective VLAN) can
selectively add different outer tag based on different inner tag according to user
demands.
With Selective VLAN, service providers can use a unique VLAN (called a service-provider
VLAN ID, or SP-VLAN ID) to support customers who have multiple VLANs, which offers
the multipoint-to-multipoint virtual LAN transparent transport and a simple L2 VPN tunnel.
Customer VLAN IDs (CE-VLAN IDs) are preserved and traffic from different customers is