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参数资料
| 型号： | ZL50408GDG2 |
| 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, LEAD FREE, MO-192, LBGA-208 |
| 文件页数： | 83/144页 |
| 文件大小： | 1779K |
| 代理商： | ZL50408GDG2 |
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ZL50408
Data Sheet
43
Zarlink Semiconductor Inc.
For example, in the above table a 1 denotes that an outgoing port is eligible to receive a packet from an incoming
port. A 0 (zero) denotes that an outgoing port is not eligible to receive a packet from an incoming port.
In this example:
Data packets received at port #0 are eligible to be sent to outgoing ports 1 and 2.
Data packets received at port #1 are eligible to be sent to outgoing ports 0 and 2.
Data packets received at port #2 are NOT eligible to be sent to ports 0 and 1.
5.9.2
Tag-Based VLAN
The ZL50408 supports the IEEE 802.1q specification for “tagging” frames. The specification defines a way to
coordinate VLANs across multiple switches. In the specification, an additional 4-octet header (or “tag”) is inserted in
a frame after the source MAC address and before the frame type. 12 bits of the tag are used to define the VLAN ID.
Packets are then switched through the network with each ZL50408 simply swapping the incoming tag for an
appropriate forwarding tag rather than processing each packet's contents to determine the path. This approach
minimizes the processing needed once the packet enters the tag-switched network. In addition, coordinating VLAN
IDs across multiple switches enables VLANs to extend to multiple switches.
Up to 4 K VLANs are supported in the ZL50408. When tag-based VLAN is enabled, each MAC address is learned
with it associated VLAN.
See IEEE 802.1Q VLAN Setup application note, ZLAN-51, for more information.
5.9.3
VLAN Stacking (Q-in-Q)
The ZL50408 partially supports VLAN stacking, also called IEEE 802.1Q-in-Q. This technology allows an additional
VLAN tag, called a provider VLAN tag, to be inserted into an existing IEEE 802.1Q tagged Ethernet frame. This
technology has been widely adapted in Metro Ethernet applications since it provides a very cost-effective solution
to transport multiple customers' VLAN across the service provider's MAN/WAN without interfering each other. The
below figure illustrates the IEEE 802.1Q frame and the Q-in-Q frame, where the provider VLAN tag is inserted in
front of the IEEE 802.1Q tag.
Destination Port Numbers Bit Map
Port Registers
9
…
2
1
0
Register for Port #0
PVMAP00_0[7:0] to PVMAP00_1[1:0]
01
1
0
Register for Port #1
PVMAP01_0[7:0] to PVMAP01_1[1:0]
01
0
1
Register for Port #2
PVMAP02_0[7:0] to PVMAP02_1[1:0]
00
0
…
Register for Port #9
PVMAP09_0[7:0] to PVMAP09_1[1:0]
00
0
Table 7 - Port-Based VLAN Mapping
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ZL50409 | 制造商:ZARLINK 制造商全称:Zarlink Semiconductor Inc 功能描述:Managed 9-Port 10/100M Ethernet Switch |
| ZL50409GDC | 制造商:ZARLINK 制造商全称:Zarlink Semiconductor Inc 功能描述:Managed 9-Port 10/100M Ethernet Switch |
| ZL50409GDC1 | 制造商:Microsemi Corporation 功能描述: |
| ZL50410 | 制造商:ZARLINK 制造商全称:Zarlink Semiconductor Inc 功能描述:Managed 8-Port 10/100M + 1-Port 10/100/1000M Ethernet Switch |
| ZL50410GDC208 | 制造商:ZARLINK 制造商全称:Zarlink Semiconductor Inc 功能描述:Managed 8-Port 10/100M + 1-Port 10/100/1000M Ethernet Switch |
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