Huawei S3700-52P-PWR-SI 02354132 User Manual
Product codes
02354132
4.4.2 Prompt Leave of Multicast Member Interfaces
When a multicast member leaves a multicast group, the host sends an IGMP Leave message.
When an interface on the S3700 is connected to only one host, the S3700 deletes the Layer 2
multicast forwarding entry of the interface immediately after receiving the IGMP Leave
message. This saves bandwidth and system resources and implements fast switching of services.
When an interface on the S3700 is connected to only one host, the S3700 deletes the Layer 2
multicast forwarding entry of the interface immediately after receiving the IGMP Leave
message. This saves bandwidth and system resources and implements fast switching of services.
4.4.3 Multicast Traffic Control
Unknown multicast packets refer to the multicast packets that do not have forwarding entries in
the Layer 2 multicast forwarding table. When receiving unknown multicast packets, the
S3700 discards the packets or broadcasts them on the VLAN that the inbound interface belongs
to.
the Layer 2 multicast forwarding table. When receiving unknown multicast packets, the
S3700 discards the packets or broadcasts them on the VLAN that the inbound interface belongs
to.
The S3700 can also control inbound multicast traffic volume by limiting the percentage of
multicast packets on an Ethernet interface.
multicast packets on an Ethernet interface.
4.4.4 Inter-VLAN Multicast Replication
Inter-VLAN multicast replication means that an MVLAN aggregates multicast flows and
replicates the flows to different user VLANs.
replicates the flows to different user VLANs.
The S3700 forwards multicast packets through the multicast VLAN, and then replicates the
packets based on the L2 multicast forwarding entries. Then, the S3700 sends these packets to
different MVLANs. user VLAN multicast replication transmits multicast data in different
VLANs. It facilitates the management and control of multicast flows and saves bandwidth.
packets based on the L2 multicast forwarding entries. Then, the S3700 sends these packets to
different MVLANs. user VLAN multicast replication transmits multicast data in different
VLANs. It facilitates the management and control of multicast flows and saves bandwidth.
4.4.5 Controllable Multicast
Multicast protocols do not provide user authentication. Therefore, a user can join or leave a
multicast group freely. The multicast source does not know when a user joins or leaves a
multicast group, so the number of users receiving multicast traffic on a network in a certain
period is unknown. Therefore, the carrier cannot perform accounting for the users. The
controllable multicast technology is introduced to solve these problems. Users have to pass
authentication before receiving multicast traffic. Furthermore, only authorized multicast traffic
can be received by users. Users who pass authentication are allowed to preview unauthorized
multicast traffic and can receive multicast traffic in specified periods within a day. Controllable
multicast does not apply to static multicast.
multicast group freely. The multicast source does not know when a user joins or leaves a
multicast group, so the number of users receiving multicast traffic on a network in a certain
period is unknown. Therefore, the carrier cannot perform accounting for the users. The
controllable multicast technology is introduced to solve these problems. Users have to pass
authentication before receiving multicast traffic. Furthermore, only authorized multicast traffic
can be received by users. Users who pass authentication are allowed to preview unauthorized
multicast traffic and can receive multicast traffic in specified periods within a day. Controllable
multicast does not apply to static multicast.
4.5 QoS
The S3700 provides the class-based QoS mechanism and supports the 802.1p priority. It provides
guarantee of low end-to-end delay, jitter, and high bandwidth.
guarantee of low end-to-end delay, jitter, and high bandwidth.
The S3700 classifies traffic according to certain rules and then performs corresponding actions
on the packets such as priority re-marking, traffic policing, congestion management, congestion
avoidance, and rate limit on the interface. In this way, value-added services such as NGN
services, IPTV, and broadband access are provided with better network service.
on the packets such as priority re-marking, traffic policing, congestion management, congestion
avoidance, and rate limit on the interface. In this way, value-added services such as NGN
services, IPTV, and broadband access are provided with better network service.
4.5.1 Traffic Classification
Traffic classification is a function of identifying the packets of a certain type by matching
information in the packet header. For example, the 802.1p priority of the packets sent by the
Operating Support System (OSS) and NMS is set to 7; the 802.1p priority of VoIP packets is
information in the packet header. For example, the 802.1p priority of the packets sent by the
Operating Support System (OSS) and NMS is set to 7; the 802.1p priority of VoIP packets is
S3700HI Ethernet Switches
Product Description
Product Description
4 Service Features
Issue 05 (2012-10-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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