CN110505137A

CN110505137A - Function Extension formula wired network devices

Info

Publication number: CN110505137A
Application number: CN201810470616.3A
Authority: CN
Inventors: 吕国正
Original assignee: Realtek Semiconductor Corp
Current assignee: Realtek Semiconductor Corp
Priority date: 2018-05-16
Filing date: 2018-05-16
Publication date: 2019-11-26
Anticipated expiration: 2038-05-16
Also published as: CN110505137B

Abstract

The present invention discloses a kind of Function Extension formula wired network devices, can execute an Ethernet device using an external circuit and not support/stop the operation supporting.One embodiment of the wired network devices includes an Ethernet interchanger and a field programmable gate array (FPGA).The interchanger includes multiple Ethernet ports, including a designated port and a first port, the interchanger receives one first package from the first port, and when first package meets a predetermined condition, modifies first package to export one second package to the designated port.The FPGA receives second package from the designated port, and according to one first modification that the interchanger in second package is made, handles second package to export a third package to the designated port.The interchanger receives the third package from the designated port, and according to one second modification that the FPGA in the third package is made, and handles the third package to export one the 4th package one of to multiple Ethernet port.

Description

Function Extension formula wired network devices

Technical field

The present invention relates to network equipments, especially with respect to the wired network devices with extension function.

Background technique

In the field of communications, tunnel (tunnel) technology can encapsulate the original package for meeting a communication protocol (encapsulate) at the tunnel package for meeting another communication protocol (that is, tunnel protocol (tunnel protocol)), Or tunnel package decapsulation (decapsulate) is obtained to the data of an original package, therefore, tunneling technique can be used for not Data transmission between compatible network equipment, or for providing a secure path in unsafe network.

It is suggested to adapt to different demands there are many new tunnel protocol in recent years.If a traditional Ethernet device is received The package for the tunnel protocol that do not supported to it, it will usually by this package transfer to higher in the Ethernet device (such as: answer With layer) internal processor handle, or (such as peripheral cell quickly interconnects via a non-Ethernet network interface (Peripheral Component Interconnect Express, PCIe) interface) it transfers to outside the Ethernet device Ppu cooperates with suitable software and hardware to handle；However, the problem that aforesaid way available energy is low.

In addition, a privately owned header (private header) can be added to a package to carry in some Ethernet devices Information relevant to tunnel protocol, and give the processing circuit that can recognize and handle the privately owned header to locate the package transmission Reason, since privately owned header is not general, aforesaid way can not be widely used.

Furthermore some thinkings are to allow general Ethernet device to carry using the header of an Ethernet package to assist with tunnel Relevant information is discussed, however, since the function of general Ethernet device (such as: interchanger) is usually inexpansible, because This Ethernet device lack enough designabilities (configurability) by this with tunnel protocol information with Too network package sends a processing circuit to handle, and the Ethernet device can not be also further processed at the processing circuit The package managed.

Summary of the invention

A purpose of the present invention is that providing a kind of Function Extension formula wired network devices (function-expandable Wired network device), the work supported is not supported/stopped executing an Ethernet device using an external circuit Industry.

The present invention discloses a kind of Function Extension formula wired network devices, one embodiment include an Ethernet device with One external circuit.The Ethernet device includes multiple Ethernet ports, and multiple Ethernet port includes a designated ends Mouth and a first port, which is used to receive one first package from the first port, and accords in first package When unifying the first predetermined condition, first package is modified to export one second package to the designated port.External circuit coupling The designated port, for receiving second package from the designated port, and according to the Ethernet device institute in second package One first modification made, handles second package to export a third package to the designated port, wherein the Ethernet device It is further utilized to receive the third package from the designated port, and done according to the external circuit in the third package one second Modification handles the third package to export one the 4th package one of to multiple Ethernet port.In an embodiment party In formula, the external circuit is according to the first modification decapsulation (decapsulate) second package (i.e. tunnel package), to generate The third package；Or the external circuit is based on a particular tunnel agreement (specific Tunnel according to first modification Protocol information) encapsulates (encapsulate) second package, to generate the third package, the wherein Ethernet Device is not supported/stops to support above-mentioned decapsulation operation and packaging operation.

Feature, implementation and effect for the present invention, hereby schema being cooperated to make preferred embodiment, detailed description are as follows.

Detailed description of the invention

Fig. 1 shows an embodiment of Function Extension formula wired network devices of the invention；

Fig. 2 shows an embodiments of the Ethernet device of Fig. 1；And

Fig. 3 shows an embodiment of the application of Function Extension formula wired network devices of the invention.

Specific embodiment

A kind of Function Extension formula wired network devices of present disclosure can execute an Ethernet using an external circuit The operation supported is not supported/stopped to device, to reach using upper elasticity.

Fig. 1 shows an embodiment of Function Extension formula wired network devices of the invention.In the present embodiment, Function Extension formula Wired network devices 100 include an Ethernet device 110 and an external circuit 120.One embodiment party of Ethernet device 110 Formula is an Ethernet interchanger (Ethernet switch), which supports or do not support an open flow protocols (Openflow Protocol), depending on implementing the demand of present inventor.One embodiment of external circuit 120 is one existing Field programmable gate array (Field-Programmable Gate Array, FPGA) or its equivalent；However, external circuit 120 It is also possible to one of lower column circuits: central processing unit (Central Processing Unit, CPU) or its equivalent； Network processing unit (Network Processing Unit, NPU) or its equivalent；An and special application integrated circuit (Application-Specific Integrated Circuit, ASIC) or its equivalent.Ethernet device 110 is not necessarily to External circuit 120 can operate；But the Collaboration of Ethernet device 110 and external circuit 120 is filled compared to Ethernet For setting 110 independent running, in specific function (such as the function of supporting a tunnel protocol (tunnel protocol)) side Face, the Collaboration can reach preferred process efficiency.

Please refer to Fig. 1.Ethernet device 110 includes four Ethernet ports P0, P1, P2 and P3, these Ethernets Network port includes an a designated port P0 and first port P1, and Ethernet device 110 is via these network ports and transmission line 10 receive and transmit package.In an embodiment, Ethernet device 110 receives one first package from first port P1, And when first package meets first predetermined condition (or say and carry specific information and the Ethernet in first package When the prestored information of device 100 is consistent), the header of first package is modified to generate one second package and be directed toward (directed To) external circuit 120, then Ethernet device 110 exports second package to external circuit via designated port P0 120；When first package does not meet first predetermined condition, Ethernet device 110 modify first package header with It generates second package and is directed toward another network equipment (such as: another Ethernet interchanger), then via other Ethernet ends One of mouth P1, P2, P3 export second package to another network equipment.One embodiment party of above-mentioned first predetermined condition Formula includes one of a first condition and a second condition, and it is a tunnel package which, which requires first package, (such as: tunnel package (GPRS Tunnel Protocol (GTP) tunnel of Universal Packet Wireless Service tunnel protocol Packet)), (second package is also a tunnel package at this time), external circuit when first package meets the first condition 120 decapsulate second package；It is a primary Ethernet package (native that the second condition, which requires first package, Ethernet packet) (i.e. without the Ethernet package of tunnel encapsulation), and requiring the primary Ethernet package is one The package for needing tunnel encapsulation (that is, the encapsulation for meeting aftermentioned particular tunnel agreement), when first package meets the second condition When (second package is an Ethernet package for needing tunnel encapsulation at this time), external circuit 120 according to a particular tunnel assist The Information encapsulation of view (such as: known/independently developed tunnel protocol of GTP or one) second package.It is worth noting that, in another In one embodiment, Ethernet device 110 includes one or more other designated ports (its effect is same as the designated port P0), should One or more other designated ports can be selected from these Ethernet port P2 and P3, or be wrapped selected from Ethernet device 110 The other Ethernet ports (being not depicted in Fig. 1) contained.

Described in brought forward, Ethernet device 110 can table look-up means or other known means seem to compare journey by known Sequence, come judge first package header some/certain fields (such as: the word of data link layer (Data Link Layer) The field of section and/or network layer (Network Layer)) content whether meet the first condition and second condition wherein it One, should/example of the contents of these fields be following message at least one: destination MAC addresses (Destination Media Access Control Address,DMAC)；Source medium access control address (Source Media Access Control Address,SMAC)；Destination Internet Protocol address (Destination Internet Protocol Address,DIP)；Source Internet Protocol address (Source Internet Protocol Address, SIP)；Destination port (the destination of User Datagram Protocol (User Datagram Protocol, UDP) port)；And carrying (Bearer).For example, Ethernet device 110 is that a support is open flow protocols (OpenFlow) Interchanger, by user set and the table 1 of executable multiple tracks determining program such as Fig. 2 to table 5 (Table_1~Table_5) institute Show, table 1 to table 5 is described below:

(1) table 1 represents Ethernet device 110 and judges whether the DMAC of first package is Ethernet device 110 MAC (i.e. the label " Key:DMAC " of table 1), if the judging result of table 1 is yes, the judgement journey of the execution table 2 of Ethernet device 110 Sequence (i.e. the label " Hit:Goto Table_2 " of table 1), if the judging result of table 1 be it is no, Ethernet device 110 give up this One package (i.e. the label " Miss:Drop " of table 1)；

(2) table 2 represent Ethernet device 110 according to DIP, SIP and UDP of first package destination port extremely It is few one of them come judge first package whether be a tunnel package (i.e. table 2 label " Key:DIP, SIP, UDP_DP "), If the judging result of table 2 is yes, the one parameter NHOP_IDX of setting of Ethernet device 110, and executes the determining program of table 5 (i.e. Label " the Hit:Set NHOP_IDX of table 2；Go to Table_5 "), if the judging result of table 2 is no, Ethernet device 110 execute the determining program (i.e. the label " Miss:Go to Table_3 " of table 2) of table 3；

(3) table 3 represents Ethernet device 110 according to the SMAC of first package to judge whether first package needs Tunnel encapsulation (i.e. the label " Key:SMAC " of table 3), if the judging result of table 3 is yes, one parameter of setting of Ethernet device 110 BEARER and determining program (i.e. label " the Hit:Set BEARER of table 3 for executing table 4；Go to Table_4 "), if table 1 Judging result be it is no, parameter BEARER is set as determining program (the i.e. table of 0 and execution table 4 by Ethernet device 110 3 label " Miss:Set BEARER=0；Go to Table_4")；

(4) table 4 represent Ethernet device 110 according to first package Bearer and DIP at least one come Determine how forwarding first package (i.e. table 4 label " Key:BEARER, DIP "), if the judging result of table 4 is sentenced for the first Break as a result, Ethernet device 110 sets parameter NHOP_IDX and executes determining program (the i.e. label of table 4 of table 5 "Hit:Set NHOP_IDX；Go to Table_5 "), if the judging result of table 4 is second of judging result, Ethernet dress Set determining program (i.e. label " the Miss:Set NHOP_IDX of table 4 of 110 settings parameter NHOP_IDX and execution table 5；Go To Table_5 "), wherein the setting of the parameter NHOP_IDX of the first judging result is different from the parameter of second of judging result The setting of NHOP_IDX；And

(5) table 5 represents Ethernet device 110 and refers to the parameter NHOP_IDX (i.e. label " Key:NHOP_ of table 5 IDX "), with when parameter NHOP_IDX meets one of multiple pre-stored parameter values, set first package DMAC, At least one (the i.e. label of table 5 of SMAC, output port and remaining time (time to live, TTL) to successively decrease " Hit:Set DMAC/SMAC, output port, TTL-1 "), or do not meet these in parameter NHOP_IDX and prestore parameter When value, give up first package (i.e. the label " Miss:Drop " of table 5).

Please refer to Fig. 1.In an embodiment, designated port P0 is to receive second package for the coupling of external circuit 120, And according to one first modification that Ethernet device 110 in second package is made, second package is handled to export a third Package is to designated port P0, and wherein Ethernet device 110 further receives the third package from designated port P0, and according to One second modification made according to external circuit 120 in the third package handles the third package to export one the 4th package and extremely should One of multiple Ethernet port P0~P3.In an embodiment, first modification is comprising to first package The modification of DMAC and/or SMAC, therefore, external circuit 120 can execute a decapsulation according to the value of the DMAC and/or SMAC (decapsulation) one of operation or encapsulation (encapsulation) operation；More particularly, when this first When package meets aforementioned first condition (first package is a tunnel package at this time), this first is modified so that second package DMAC is one first value, and (first package is one to need tunnel at this time when first package meets aforementioned second condition The primary Ethernet package of encapsulation), first modification is so that the DMAC of second package is a second value, thus external circuit 120 can decapsulate second package when DMAC of second package is first value to generate the third package, and external Circuit 120 can in the DMAC of second package be the second value when, based on aforementioned particular tunnel agreement information (such as: GTP's Table and tunnel endpoint identifier (Tunnel Endpoint Identifier, TEID)) second package is encapsulated, with generate should Third package.In an embodiment, second modification comprising to the DMAC of second package modification (such as: the DAMC quilt Be revised as the MAC of Ethernet device 110) and SMAC to second package modification (such as: when 120 envelope of external circuit When filling second package to generate the third package, which is modified to carry the information that TEID etc. meets tunnel protocol), because This, Ethernet device 110 can accept the third package according to the value of the DMAC to do subsequent processing, and the value according to the SMAC The third package is modified to transmit the 4th package to another network equipment (such as: another Ethernet interchanger), or is passed Sending the 4th package to external circuit 120, (under this situation, external circuit 120 is previously that decapsulation should to carry out the packaging operation Second package is to generate the third package).In an embodiment, Ethernet device 110 is not supported/stops to support that this is specific Tunnel protocol (or Ethernet device 110 can not be in the envelope not by handling the particular tunnel agreement in the case of CPU/NPU Packet), therefore pass through the assistance of external circuit 120, Function Extension formula wired network devices 100 are able to that the particular tunnel is supported to assist View.

Described in brought forward, Ethernet device 110 can determine whether the third package meets one second predetermined condition, to determine The 4th package is transmitted to another network equipment, or transmits the 4th package to external circuit 120.In detail, if this Three packages meet second predetermined condition, and Ethernet device 110 modifies the third package to export the 4th package to this and refer to Fixed end mouthful P0, allows external circuit 120 to receive and process the 4th package whereby；If the third package does not meet the second predetermined item Part, Ethernet device 110 modify the third package with export other than the 4th package to designated port P0 it is multiple with Too one of network port P1, P2, P3 transmits the 4th package to another network equipment whereby.In an embodiment In, second predetermined condition is similar to aforementioned second condition；In detail, it is an ether which, which requires the third package, Network package, and requiring the Ethernet package is one to need tunnel encapsulation (that is, the encapsulation for meeting aforementioned particular tunnel agreement) Package.In an embodiment, when the third package meets second predetermined condition, external circuit 120 is according to the 4th The third modification that Ethernet device 110 is made in package, handles the 4th package, specified to this to export one the 5th package Port P0；Later, Ethernet device 110 receives the 5th package from designated port P0, and according to the 5th package China and foreign countries One the 4th modification that portion's circuit 120 is made, handles the 5th package to export other than one the 6th package to designated port P0 One of multiple Ethernet port P1, P2, P3.In an embodiment, similar first modification of third modification, Modification comprising DMAC and/or SMAC to the third package, similar second modification of the 4th modification, comprising to the 4th envelope The modification of the DMAC and SMAC of packet.In an embodiment, external circuit 120 encapsulates this according to aforementioned particular tunnel agreement 4th package is to export the 5th package to designated port P0.

Please refer to Fig. 1.No matter first package be a new-type tunnel package (its payload (payload) include one with Too network header) or a primary Ethernet package, the embodiment of Fig. 1 also can be in the Ethernet report for not modifying first package It is carried out in the case of head.In an embodiment, Ethernet device 110 supports an old-fashioned tunnel protocol (legacy Tunnel Protocol), therefore, Ethernet device 110 and external circuit 120 are to utilize the old-fashioned tunnel for meeting the old-fashioned tunnel protocol The tunnel protocol supported is not supported/stopped to road header (legacy tunnel header) to carry Ethernet device 110 Information；In detail, when first package is that a tunnel package meets the old-fashioned tunnel protocol, Ethernet device 110 is modified (the old-fashioned tunnel header both deposited is used as at this time is somebody's turn to do (preexisting) old-fashioned tunnel header that the one of first package had both deposited The header of second package) or combine new an old-fashioned tunnel header and first package (the new old-fashioned tunnel header is made at this time For the header of second package) to generate second package；When first package is that a primary Ethernet package or one are new When formula tunnel package does not meet the old-fashioned tunnel protocol, Ethernet device 110 combines an old-fashioned tunnel header and first envelope Packet is to generate second package.In an embodiment, when first package does not include an old-fashioned tunnel header, aforementioned first Modification is combined as second package comprising the old-fashioned tunnel header and first package, so that external circuit 120 is according to this Second package of information processing entrained by old-fashioned tunnel header is to export the third package to designated port P0.Implement in one In mode, when first package includes the old-fashioned tunnel header that one had both deposited, first modification is comprising to the old-fashioned tunnel both deposited Road header modification (such as: the modification to the DMAC/SMAC of the old-fashioned tunnel header both deposited, or to this both deposited it is old-fashioned The modification of the unemployed field of tunnel header), so that external circuit 120 is according to entrained by the old-fashioned tunnel header both deposited Information processing second package to export the third package to designated port P0.In an embodiment, when first envelope When packet includes the old-fashioned tunnel header that one had both deposited, first modification is comprising combining a new old-fashioned tunnel header and first package To generate second package, so that the old-fashioned tunnel header both deposited will not be modified, and external circuit 120 is new old according to this Second package of information processing entrained by formula tunnel header is to export the third package to designated port P0.In an embodiment party In formula, it is aforementioned second modification comprising in second package as the old-fashioned tunnel header of header modification (such as: it is old-fashioned to this The modification of the DMAC/SMAC of tunnel header), so that Ethernet device 110 is according to information entrained by the old-fashioned tunnel header The third package is modified to export the 4th package.In summary, the embodiment of Fig. 1 can be carried using above-mentioned old-fashioned tunnel header Information needed for subsequent processing (such as: imposing tunnel encapsulation to package and impose decapsulation to tunnel package), and may be selected Avoid modifying to property the script header of first package.

Please refer to Fig. 1.In an embodiment, multiple Ethernet port P0, P1, P2, P3 at least one As the port an at least aggregation of bandwidth (Link Aggregation, LAG), which includes designated port P0, Ethernet device 110 forms an aggregation of bandwidth via at least port LAG with external circuit 120 and connect, wherein the bandwidth Assemble a transmission rate of connector unification IEEE 802.3ad standard criterion and aggregation of bandwidth connection not less than per second 10000000000 (10Gigabit/s).In an embodiment, via being transmitted as multiple Ethernet port P0, P1, P2, P3 Full duplex (full-duplex) transmission.In an embodiment, as shown in figure 3, Function Extension formula wired network devices 100 can Gateway (the Serving Gateway- of client layer as a mobile core network (mobile core network) 310 User Plane,SGW-U)312；Function Extension formula wired network devices 100 also can be used as a mobile relations with network operation framework 320 SGW-U 322, at this point, Function Extension formula wired network devices 100 are to be set to following therebetween: Long Term Evolution One evolution node B (eNB) 330 of (Long Term Evolution, LTE) is used to communicate with client 340；One local clothes Be engaged in device (local server) 324, is connected to SGW-U 322；And one client layer packet data mesh network close (packet Data network gateway, PDN Gateway-User Plane (PGW-U)) 314, it is connected to SGW-U 312 and one Internet 350.It is worth noting that, it includes it that mobile core network 310 and mobile relations with network operation framework 320, which visually implement demand, Its hardware and/or other connection relationships, this partly belongs to the prior art, and related description is omitted herein.

Aforementioned packet header modification (such as: first modification, second modification, third modification, the 4th modification) though mostly with For the modification of DMAC and/or SMAC, so implementation of the invention is not limited, and the present invention can also be by modifying data link layer And/or other fields (such as: EtherType (ETHER TYPE), virtual local area network tags (VLAN TAG)) of network layer are to take Band specific information (such as: information relevant to tunnel protocol) it is distinguished for ether network equipment 110 and/or external circuit 120 Know and take appropriate operation.It is worth noting that, modification package header belong to the prior art, to package impose tunnel encapsulation with And decapsulation is imposed to tunnel package and also belongs to the prior art, therefore understand and implement not influencing one skilled in the art Under the premise of the present invention, the explanation of the above-mentioned prior art is omitted herein.Separately it is worth noting that, being embodied as possible premise Under, the art tool usually intellectual optionally implements the part or complete in aforementioned any embodiment/embodiment Portion's technical characteristic, or some or all of selectively implement in aforesaid plurality of embodiment/embodiment the combination of technical characteristic, Increase the elasticity when present invention is implemented whereby.

In conclusion Function Extension formula wired network devices of the invention can execute an Ethernet using an external circuit The operation supported is not supported/stopped to network device, to reach using upper elasticity.

Although the embodiment of the present invention is as described above, however these embodiments not are used to limit the present invention, this technology neck The domain tool usually intellectual content that can express or imply according to the present invention imposes variation to technical characteristic of the invention, it is all this Many variations may belong to patent protection scope sought by the present invention, and in other words, scope of patent protection of the invention must regard Subject to the as defined in claim of this specification.

Symbol description

10 transmission lines

100 Function Extension formula wired network devices

110 Ethernet devices

120 external circuits

Designated port in P0 Ethernet port

First port in P1 Ethernet port

P2, P3 Ethernet port

The determining program of Table_1~Table_5 Ethernet device

310 mobile core networks

312,322 SGW-U (gateway of client layer)

314 PGW-U (the packet data mesh network of client layer closes)

320 mobile relations with network operation frameworks

324 local servers

The evolution node B of 330 Long Term Evolutions

340 clients

350 internets.

Claims

1. a kind of Function Extension formula wired network devices, include:

One Ethernet device, includes multiple Ethernet ports, and multiple Ethernet port includes a designated port and one First port, which is used to receive one first package from the first port, and meets one the in first package When one predetermined condition, one first modification is executed to export one second package to the designated port to first package；And

One external circuit couples the designated port, for receiving second package, and according to first modification as a result, to this Second package executes one second and modifies to export a third package,

After wherein the Ethernet device receives the third package, according to this second modification as a result, handle the third package with One the 4th package is exported one of to multiple Ethernet port.

2. Function Extension formula wired network devices as described in claim 1, wherein first modification comprising following modification extremely It is one of few: the modification to a destination MAC addresses of first package；And to the one of first package The modification of source medium access control address.

3. Function Extension formula wired network devices as described in claim 1, wherein second modification includes following modification: to this The modification of one destination MAC addresses of the second package；And the source medium access control to second package The modification of address.

4. Function Extension formula wired network devices as described in claim 1, wherein the external circuit is according to the first modification solution Second package is encapsulated, to generate the third package；Or the external circuit is assisted according to first modification based on a particular tunnel The information of view encapsulates second package, to generate the third package.

5. Function Extension formula wired network devices as claimed in claim 4, wherein first predetermined condition includes one first One of part and a second condition；It is a tunnel package that the first condition, which requires first package,；Second condition requirement First package is an Ethernet package, and requiring the Ethernet package is a package for needing tunnel encapsulation；When this When one package meets the first condition, which is used to decapsulate second package；And when first package meets this When second condition, which is used to the information according to the particular tunnel agreement to encapsulate second package.

6. Function Extension formula wired network devices as claimed in claim 5, wherein when first package meets the first condition When, which includes so that a destination MAC addresses of second package are one first value；And works as and be somebody's turn to do When first package meets the second condition, which includes so that the destination medium plan of second package Location is a second value.

7. Function Extension formula wired network devices as described in claim 1, wherein making a reservation for if the third package meets one second Condition, the Ethernet device execute third modification to the third package to export the 4th package to the designated port；With And if the third package does not meet second predetermined condition, which modifies the third package to export the 4th envelope Packet is one of to multiple Ethernet port.

8. Function Extension formula wired network devices as claimed in claim 7, wherein when to meet this second predetermined for the third package When condition, which is used to receive the 4th package from the designated port, and according to third modification as a result, to this Four packages execute one the 4th modification to export one the 5th package, which is further utilized to receive the 5th package, And according to the 4th modification as a result, handle the 5th package with export one the 6th package to multiple Ethernet port its One of.

9. Function Extension formula wired network devices as described in claim 1, wherein the Ethernet device supports an old-fashioned tunnel Road agreement, and encapsulate first package according to the old-fashioned tunnel protocol to generate second package；When first package does not wrap Containing one both deposited old-fashioned tunnel header when, which is combined as this comprising an old-fashioned tunnel header and first package Second package, so that the external circuit handles second package according to the old-fashioned tunnel header to export the third package；And When first package includes the old-fashioned tunnel header both deposited, first modification is comprising to the old-fashioned tunnel header both deposited Modification or combination comprising new an old-fashioned tunnel header and first package, thus the external circuit according to this both deposited it is old-fashioned Tunnel header or the new old-fashioned tunnel header handle second package to export the third package.

10. Function Extension formula wired network devices as claimed in claim 9, wherein second modification is comprising to second package The old-fashioned tunnel header modification.