参数资料
型号: ZL50418GKG2
厂商: CONEXANT SYSTEMS
元件分类: 网络接口
英文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA553
封装: 37.50 X 37.50 MM, 2.33 MM HEIGHT, LEAD FREE, MS-034, HSBGA-553
文件页数: 97/155页
文件大小: 1928K
代理商: ZL50418GKG2
ZL50418
Data Sheet
46
Zarlink Semiconductor Inc.
3.3.2.2
Read Command
3.4
Stacking
The ZL50418 supports expanded port count by providing stacking capabilities. The Gigabit port is used as the link
between boxes.
In addition to a standard back-to-back configuration of devices, the ZL50418 also provides more powerful stacking
alternatives:
Unidirectional ring configuration. Up to 32 devices. Devices are connected by one Gigabit link. Flow control
cannot be enabled in this configuration, because of the inherent inefficiency in sending flow control
messages upstream in a unidirectional ring.
Bidirectional ring configuration. Up to 32 devices. Devices are connected by two Gigabit links, forming two
rings, one clockwise and one counter clockwise. Flow control may be enabled in this configuration. The
outgoing direction of a packet (clockwise or counter clockwise) is selected using a hash key for load
distribution. The hash key can be a function of source MAC address, destination MAC address, both MAC
addresses, or source port. This configuration provides fault-tolerance when one of the stacking links fail.
Cascade Stacking configuration. Up to 32 devices. Devices are connected to form a list configuration.
Devices are connected by two Gigabit links, except the two devices at both ends, where one Gigabit port is
used as an uplink port. Flow control may be enabled in this configuration.
STROBE-
D0
AUTOFD-
A0 A1 A2 ...
A9
A10
A11
R
D0 D1 D2 D3 D4 D5 D6 D7
START
ADDRESS
COMMAND
DATA
A0 A1 A2
A9 A10 A11
MVTX260x
. . .
MVTX260x
. . .
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