Huawei S3700-28TP-PWR-SI 02354133 User Manual
Product codes
02354133
subordinate VLANs can communicate with ports on the MUX VLAN. Ports on a subordinate
group VLAN can communicate with each other but cannot communicate with ports on other
subordinate group VLANs. Ports on a subordinate separate VLAN cannot communicate with
each other.
group VLAN can communicate with each other but cannot communicate with ports on other
subordinate group VLANs. Ports on a subordinate separate VLAN cannot communicate with
each other.
Voice VLAN
A voice VLAN is used to transmit voice data flows. You can create a voice VLAN and add the
interface connected to the voice device to the voice VLAN. Then voice data flows can be
transmitted on the voice VLAN.
interface connected to the voice device to the voice VLAN. Then voice data flows can be
transmitted on the voice VLAN.
You can apply special QoS configuration to the voice data packets transmitted on the voice
VLAN so that voice data packets are transmitted with high priority. The quality of the voice
service is ensured.
VLAN so that voice data packets are transmitted with high priority. The quality of the voice
service is ensured.
VLAN Mapping
VLAN mapping means that the S3700 replaces the outer VLAN tags of data frames to the
specified VLAN tags according to the preset VLAN mapping table so that services are
transmitted according to the network planning of the carrier.
specified VLAN tags according to the preset VLAN mapping table so that services are
transmitted according to the network planning of the carrier.
The S3700 supports the mapping from one or more customer VLAN IDs (C-VLANs) to a service
VLAN ID (S-VLAN).
VLAN ID (S-VLAN).
NOTE
l C-VLAN is the VLAN that a user-side interface belongs to. It identifies a user or a type of users.
l An S-VLAN is a VLAN defined on the public network by the carrier. The S-VLAN ID identifies a
l An S-VLAN is a VLAN defined on the public network by the carrier. The S-VLAN ID identifies a
service.
3.1.5 QinQ
The 802.1Q-in-802.1Q (QinQ) protocol is a Layer 2 tunneling protocol based on the IEEE
802.1Q. A frame transmitted on the public network has double 802.1Q tags. One tag identifies
the public network and the other identifies the private network.
802.1Q. A frame transmitted on the public network has double 802.1Q tags. One tag identifies
the public network and the other identifies the private network.
Usually, carriers define VLANs on the public network, and users define VLANs on their own
private networks. Therefore, different private networks may use the same VLAN ID. Through
the QinQ function, the S3700 adds public VLAN tags to the packets from private networks.
Then the private VLAN tag becomes the inner VLAN tag. In this way, packets from user
networks are transmitted transparently on the public network, and thus user networks are
separated from the public network.
private networks. Therefore, different private networks may use the same VLAN ID. Through
the QinQ function, the S3700 adds public VLAN tags to the packets from private networks.
Then the private VLAN tag becomes the inner VLAN tag. In this way, packets from user
networks are transmitted transparently on the public network, and thus user networks are
separated from the public network.
Currently, the S3700 supports basic QinQ and selective QinQ.
l
l
Basic QinQ
Basic QinQ is implemented based on interfaces. All the frames that reach the public network
through an interface are tagged with the same public VLAN ID.
Basic QinQ is implemented based on interfaces. All the frames that reach the public network
through an interface are tagged with the same public VLAN ID.
l
Selective QinQ
Selective QinQ extends the basic QinQ function. It enables an interface to determine the
outer VLAN tag according to the private VLAN tag so that packets from different private
networks are transmitted through different paths. Thus different services can be identified
and service deployment is easier. For example, voice data packets from different VLANs
are tagged with the same outer tag to obtain the same QoS level; common data services are
tagged with another VLAN tag to obtain different QoS level.
Selective QinQ extends the basic QinQ function. It enables an interface to determine the
outer VLAN tag according to the private VLAN tag so that packets from different private
networks are transmitted through different paths. Thus different services can be identified
and service deployment is easier. For example, voice data packets from different VLANs
are tagged with the same outer tag to obtain the same QoS level; common data services are
tagged with another VLAN tag to obtain different QoS level.
S3700HI Ethernet Switches
Product Description
Product Description
3 Link Features
Issue 05 (2012-10-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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