IP-COM G3210P, Руководство пользователя

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Advanced Settings
By default, the 802.1P
priority tags are mapped to the Switch’s priority queues as follows:
802.1p Priority Queue
1,2 1
0,3 2
4,5 3
6,7 4
2
．
DSCP Priority
As shown in the figure above, the ToS (Type of Service) in an IP header contains 8 bits.
The first three bits indicate IP precedence in the range of 0 to 7. RFC2474 re-defines the
ToS field in the IP packet header, which is called the DS field. The first six bits of the DS
field indicate DSCP precedence in the range of 0 to 63. The last 2 bits are reserved.
On the Web management page, you can configure different DS field mapping to the
corresponding priority levels. Non-IP datagram with 802.1Q tag are mapped to different
priority levels based on 802.1P priority mode and on which data frames are tagged or not.
By default, t
he DSCP priority tags are mapped to the Switch’s CoS priority queues as
follows:
DSCP Priority CoS Priority
0~15 1
16~31 3
32~47 5
48~63 7
3
．
Port Priority
The port priority is based on switch's physical ports in a range of 0 to 7. It is used to
determine the forwarding sequence of packets which are not carrying priority identifiers.
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Scheduling Mode Overview