参数资料
型号: ZL50408GDC
厂商: CONEXANT SYSTEMS
元件分类: 网络接口
英文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA208
封装: 17 X 17 MM, 1.40 MM HEIGHT, MO-192, LBGA-208
文件页数: 139/144页
文件大小: 1779K
代理商: ZL50408GDC
ZL50408
Data Sheet
94
Zarlink Semiconductor Inc.
12.3.6
(Group 5 Address) Buffer Control/QOS Group
12.3.6.1
QOSC – QOS Control
IC Address: h04B; CPU Address: h0500
Accessed by CPU and I2C (R/W)
Bit [2]:
Delete MAC report control
0 – Report MAC address deletion (MAC address is deleted from MCT after
aging time) (Default)
1 – Disable report MAC address deletion
Bit [3]:
Delete Control
0 – MAC address entry is removed when it is old enough to be aged (Default)
1 – Disable aging logic from removing MAC during aging
However, a report is still sent to the CPU in both cases, when bit [2] = 0
Bit [4]:
Enable RSVP Packet trapping
0 - Disable RSVP Packet trapping. (Default)
1 - Enable RSVP Packet trapping. IP Multicast also needs to be enabled for
this function.
Bit [5]
Reserved
Bit [6]:
Disable MCT speed-up aging
0 – Enable speed-up aging when MCT resource is low. (Default)
1 – Disable speed-up aging when MCT resource is low.
Bit [7]:
Slow Learning
0 – Learning is performed independent of search demand (Default)
1 – Enable slow learning. Learning is temporary disabled when search
demand is high
Bit [0]:
Enable TX rate control (on RMAC ports only)
0 – Disable (Default)
1 – Enable
Bit [1]:
Enable RX rate control (on RMAC ports only)
0 – Disable (Default)
1 – Enable
Bits [4:2]:
Reserved
Bit [5]:
Select VLAN tag or TOS (IP packets) to be preferentially picked to map
transmit priority and drop precedence
0 – Select VLAN Tag priority field over TOS (Default)
1 – Select TOS over VLAN tag priority field
Bit [6]:
Select TOS bits for transmission priority
0 – Use TOS [4:2] bits to map the transmit priority (Default)
1 – Use TOS [7:5] bits to map the transmit priority
Bit [7]:
Select TOS bits for drop precedence
0 – Use TOS [4:2] bits to map the drop precedence (Default)
1 – Use TOS [7:5] bits to map the drop precedence
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