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參數(shù)資料
| 型號(hào)： | IP178C-DS-R06 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8 Port 10/100 Ethernet Integrated Switch |
| 中文描述： | 8端口10/100以太網(wǎng)集成開(kāi)關(guān) |
| 文件頁(yè)數(shù)： | 36/93頁(yè) |
| 文件大?。?/td> | 538K |
| 代理商： | IP178C-DS-R06 |
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IP178C/IP178C LF/IP178CH/IP178CH LF
Datasheet
2.5
Copyright
2004, IC Plus Corp.
36/93
June 21, 2007
IP178Cx-DS-R12
Tag VLAN/ Tag and un-tag function
Tag and un-tag function
IP178C/IP178CH
inserts or removes a tag of a frame if tagging/ un-tagging function is enabled. The
operation is illustrated as follows. The tag information is defined in MII register 30.3~30.11 and EEPROM
register 6~22.
The operation of a port which forwards the packet
Frame type of the
received packet
Forward to a untagged filed
Untagged
Forward
the
packet
without
modification
Forward to a tagged field
Insert a tag using the default VLAN tag
value of the source port
Calculate new CRC
The default VLAN tag value is defined in
the MII register 30.3~30.11.
Keep priority field.
Replace the tag with the default VLAN tag
value of the source port
Calculate new CRC
The default VLAN tag value is defined in
the MII register 30.3~30.11.
Forward the packet without modification
Priority-tagged
(VLAN ID=0)
Strip tag
Calculate new CRC
VLAN-tagged
Strip tag
Calculate new CRC
2.6
Tag VLAN
If tag VLAN function is enabled (MII register 30.13[3] TAG_VLAN_EN is logic high),
IP178C/IP178CH
forwards a packet according to MAC address table and one of the sixteen VLAN output port masks,
defined in MII register 30.14~30.29. One of the sixteen VLAN output mask is selected by VID index,
which is four bits selected from VID field in a tag. VID index is defined in MII register 30.13[2:0] VID_SEL.
For example, VLAN output port mask 1 is selected if VID index selected by VID_SEL is equal to 1.
IP178C/IP178CH
handles an un-tagged packet using the default VLAN tag value of its source port. A
packet with VID equal to 12’b0 will be handled as un-tag frame.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IP178C-DS-R07 | 8 Port 10/100 Ethernet Integrated Switch |
| IP178C-DS-R08 | 8 Port 10/100 Ethernet Integrated Switch |
| IP178C-DS-R09 | 8 Port 10/100 Ethernet Integrated Switch |
| IP178C-DS-R10 | 8 Port 10/100 Ethernet Integrated Switch |
| IP178C-DS-R01 | 8 Port 10/100 Ethernet Integrated Switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IP178C-DS-R07 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch |
| IP178C-DS-R08 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch |
| IP178C-DS-R09 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch |
| IP178C-DS-R10 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch |
| IP178CH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch |
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