Zte ZXR10 8900E series, Product Description

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ZXR10 8900E series Core Switch Product Description
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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