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參數(shù)資料
| 型號(hào)： | MVTX2604 |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | Managed 24-Port 10/100 Mb + 2 Port 1 Gb Ethernet Switch |
| 中文描述： | 管理24端口的10/100 Mb 2端口千兆以太網(wǎng)交換機(jī)1 |
| 文件頁數(shù)： | 28/173頁 |
| 文件大小： | 2097K |
| 代理商： | MVTX2604 |
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MVTX2604
Data Sheet
30
Zarlink Semiconductor Inc.
5.7 Port and Tag Based VLAN
The MVTX2604 supports two models for determining and controlling how a packet gets assigned to a VLAN: port
priority and tag -based VLAN.
5.7.1 Port-Based VLAN
An administrator can use the PVMAP Registers to configure the MVTX2604 for port-based VLAN (see “Registration
Definition” on page 42). For example, ports 1-3 might be assigned to the Marketing VLAN, ports 4-6 to the
Engineering VLAN and ports 7-9 to the Administrative VLAN. The MVTX2604 determines the VLAN membership of
each packet by noting the port on which it arrives. From there, the MVTX2604 determines which outgoing port(s)
is/are eligible to transmit each packet or whether the packet should be discarded.
Table 3 - PVMAP Register
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.
5.7.2 Tag-Based VLAN
The MVTX2604 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 MVTX2604 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 255 VLANs are supported in the MVTX2604. The 4 K VLANs specified in the IEEE 802.1q are mapped to 255
VLAN indexes. The mapping is made by the VLAN index mapping table. Based on the VLAN index (VIXn), the
source and destination port membership is checked against the content in the VLAN Index Port association table. If
the destination port is a member of the VLAN, the packet is forwarded; otherwise it is discarded. If the source port is
not a member, a “New VLAN Port” message is sent to the CPU. A filter can be applied to discard the packet if the
source port is not a member of the VLAN.
Destination Port Numbers Bit Map
Port Registers
26
…
2
1
0
Register for Port #0
PVMAP00_0[7:0] to PVMAP00_3[2:0]
0
1
1
0
Register for Port #1
PVMAP01_0[7:0] to PVMAP01_3[2:0]
0
1
0
1
Register for Port #2
PVMAP02_0[7:0] to PVMAP02_3[2:0]
0
0
0
0
…
Register for Port #26
PVMAP26_0[7:0] to PVMAP26_3[2:0]
0
0
0
0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MVTX2604AG | Managed 24-Port 10/100 Mb + 2 Port 1 Gb Ethernet Switch |
| MVTX2801 | Unmanaged 4-Port 1000 Mbps Ethernet Switch |
| MVTX2801AG | Unmanaged 4-Port 1000 Mbps Ethernet Switch |
| MVTX2802 | Managed 4-Port 1000 Mbps Ethernet Switch |
| MVTX2802AG | Managed 4-Port 1000 Mbps Ethernet Switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MVTX2604A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MVTX260x Physical Port Control |
| MVTX2604AG | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Managed 24-Port 10/100 Mb + 2 Port 1 Gb Ethernet Switch |
| MVTX2801 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Unmanaged 4-Port 1000 Mbps Ethernet Switch |
| MVTX2801A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Unmanaged 4 port Gigabit Ethernet switch |
| MVTX2801AG | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Unmanaged 4-Port 1000 Mbps Ethernet Switch |
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