US 8,045,461 B2Granted

Method and device for implementing virtual-switch

AssigneeHuawei Technologies Co., Ltd.

InventorsLingyuan Fan, Yuepeng Chen, Dengchao Wu

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Abstract

The present invention provides a method and a device for implementing a V-Switch. Through setting up a V-Switch correlation with respect to at least two VLAN tags, a DRE performs a V-Switch transmission on an Ethernet frame received according to the V-Switch correlation with respect to at least two VLAN tags. The invention can expand the number of V-Switch connections carried on a local link to 4096×4096, or even to 4096×4096×4096 . . . Therefore, the problem of insufficient VLAN tag resources is solved, and the requirements for the scale of V-Switch technology is met. Moreover, a more effective V-Switch method is provided, the switching capability of V-Switch is improved, and the application scale of V-Switch technology is enlarged.

Claims14

Dependent claims

A method for implementing a Virtual-Switch (V-Switch), comprising:

setting up a V-Switch correlation with respect to at least two Virtual Local Area Network (VLAN) tags;
receiving a data frame;
and
performing, by a Data Retransmission Entity (DRE), a V-Switch transmission on the data frame according to the V-Switch correlation with respect to the at least two VLAN tags;
wherein the at least two VLAN tags comprise an outer VLAN tag and an inner VLAN tag, and the inner VLAN tag comprises at least a one-layer VLAN tag, and
the V-Switch correlation is a correlation:
between a first port with a first port VLAN tag and a second port with a second port outer VLAN tag and a second port inner VLAN tag, or
between the first port with a first port outer VLAN tag and a first port inner VLAN tag and the second port with the second port outer VLAN tag with the second port inner VLAN tag,
wherein, the correlation is set in a VLAN switching table and
wherein:
an inner VLAN tag field comprising a first inner VLAN tag and a second inner VLAN tag is configured in the VLAN switching table;
when the first inner VLAN tag corresponding to one port in a record of the VLAN switching table is invalid and the second inner VLAN tag corresponding to the other port is valid, information stored in the record is the V-Switch correlation between the first port, the first port outer VLAN tag and the second port the second port outer VLAN tag. the second port inner VLAN tag;
when the first inner VLAN tag and the second inner VLAN tag corresponding to the two ports in the record of the VLAN switching table are both valid, the information stored in the record is the V-Switch correlation between the first port, the first port outer VLAN tag, the first port inner VLAN tag and the second port, the second port outer VLAN tag, the second port inner VLAN tag;
and
when the first inner VLAN tag and the second inner VLAN tag corresponding to the two ports in the record of the VLAN switching table are both invalid, the information stored in the record is the V-Switch correlation between the first port, the first port outer VLAN tag and the second port, the second port outer VLAN tag.

12 more elements

A device for implementing a V-Switch, comprising:

a storage module adapted to store a V-Switch correlation in a VLAN switching table with respect to at least two VLAN tags,
wherein the at least two VLAN tags comprise an outer VLAN tag and an inner VLAN tag, and the inner VLAN tag comprises at least one-layer VLAN tag,
wherein the V-Switch correlation is:
between a first port with a first port VLAN tag and a second port with a second port outer VLAN tag and a second port inner VLAN tag, or
between a first port with a first port outer VLAN tag and a first port inner VLAN tag and a second port with a second port outer VLAN tag and a second port inner VLAN tag;
and
a forwarding module configured to transmit an Ethernet frame received according to the V-Switch correlation stored in the storage module,
wherein an inner VLAN tag field comprising a first inner VLAN tag and a second inner VLAN tag is configured in the VLAN switch table, and
wherein:
when the first inner VLAN tag corresponding to one port in a record of the VLAN switching table is invalid and the second inner VLAN tag corresponding to the other port is valid, information stored in the record is the V-Switch correlation between the first port, the first port outer VLAN tag and the second port, the second port outer VLAN tag, the second port inner VLAN tag;
when the first inner VLAN tag and the second VLAN tag corresponding to the two ports in the record of the VLAN switching table are both valid, the information stored in the record is the V-Switch correlation between the first port, the first port outer VLAN tag, the first port inner VLAN tag and the second port, the second port outer VLAN tag, the second port inner VLAN tag;
and
when the first inner VLAN tag and the second inner VLAN tag corresponding to the two ports in the record of the VLAN switching table are both invalid, the information stored in the record is the V-Switch correlation between the first port, the first port outer VLAN tag and the second port, the second port outer VLAN tag.

10 more elements

A method for implementing a Virtual-Switch (V-Switch), comprising:

setting up a V-Switch correlation with respect to at least two Virtual Local Area Network (VLAN) tags in a VLAN switching table;
receiving a data frame;
and
performing, by a Data Retransmission Entity (DRE), a V-Switch transmission on the data frame according to the V-Switch correlation with respect to the at least two VLAN tags;
wherein the at least two VLAN tags comprise an outer VLAN tag and an inner VLAN tag, and the inner VLAN tag comprises at least a one-layer VLAN tag, and
the V-Switch correlation is:
between a first port with a first port VLAN tag and a second port with a second port outer VLAN tag and a second port inner VLAN tag, or
between a first port with a first port outer VLAN tag and a first port inner VLAN tag and a second port with a second port outer VLAN tag and a second port inner VLAN tag;
wherein:
a switching mode type field comprising a switching mode type and an inner VLAN tag field are configured in the VLAN switching table;
when the switching mode type in a record of the VLAN switching table is a first predetermined value, information stored in the record is the V-Switch correlation between the first port with the first port outer VLAN tag and the second port with the second port outer VLAN tag and the second port inner VLAN tag;
when the switching mode type in the record of the VLAN switching table is a second predetermined value, the information stored in the record is the V-Switch correlation between the first port with the first port outer VLAN tag and the first port inner VLAN tag and the second port with the second port outer VLAN tag and the second port inner VLAN tag;
and
when the switching mode type in the record of the VLAN switching table is a third predetermined value, the information stored in the record is the V-Switch correlation between the first port with the first port outer VLAN tag and the second port with the second port outer VLAN tag.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/014,170Filed 15 Jan 2008 · continuation
Priority: CN 2005 1 008396815 Jul 2005
Published: US 2008/0112408 A115 May 2008
Granted: 25 Oct 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04L 12/465
Details on frame tagging: wherein a single frame includes a plurality of VLAN tags
H04L 49/354
Switches specially adapted for specific applications: for supporting virtual local area networks [VLAN]
H04L 49/70
Packet switching elements: virtual switches
H04L
Digital communication