User manual
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none multicast address did not allow to add in this table and the format must according to XX-XX-XX-
XX-XX-XX, did not have space or other illegal character, otherwise, will be display warning information.
1. This function has great impact on forwarding multicast, unless you can make sure the address is no problem,
otherwise, please use it with caution.
2. The following multicast addresses are reserved for the device or protocol, please don't use
them: 0180C20000xx, 01005E0000xx.
3. IGMP dynamic learning will not update the multicast address, static multicast forwarding is a kind of safety
mechanism.
6.5 QOS
6.5.1 QOS Classification
QoS provides four internal queues, each queue supports four different levels of traffic, shorter
persistence time of high-priority data packets in the switch, supports lower latency for certain delay-
sensitive traffic. According to port ID, MAC address, 802.1p priority tags, DiONetServ and IP TOS,
equipment can be abale to put the packets to an appropriate level.
users can select the QOS priority queue mechanism, the queue mechanism in two ways: weighted Fair
mode and strict mode.
6.5.2 COS
IEEE P802.1p is the name of a task group active during 1995–98 responsible for adding traffic class
expediting and dynamic multicast filtering to the IEEE 802.1D standard. Essentially, they provided a
mechanism for implementing Quality of Service (QoS) at the media access control (MAC) level. The
group's work with the new priority classes and Generic Attribute Registration Protocol (GARP) was not
published separately but was incorporated into a major revision of the standard, IEEE 802.1D-1998. It
also required a short amendment extending the frame size of the Ethernet standard by four bytes which
was published as IEEE 802.3ac in 1998.
The QoS technique developed by the working group, also known as class of service (CoS), is a 3-
bit field called the Priority Code Point (PCP) within an Ethernet frame header when using VLAN tagged
frames as defined by IEEE 802.1Q. It specifies a priority value of between 0 and 7 inclusive that can be
used by QoS disciplines to differentiate traffic. Although this technique is commonly referred to as
IEEE