QinQ Mapping


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Hello  

I would like to know what are the principles of QinQ Mapping and what is the difference compared to VLAN Mapping.  

Thanks
Hello,  


Please find below the answer for your questions

 QinQ Mapping

 Principles

QinQ mapping maps VLAN tags in user packets to specified tags before the user packets are transmitted across the public network.

* Before sending local VLAN frames, a sub-interface replaces the tags in the local frames with external VLAN tags.
* Before receiving frames from external VLANs, a sub-interface replaces the tags in the external VLANs with local VLAN tags.

QinQ mapping allows a device to map a user VLAN tag to a carrier VLAN tag, shielding different user VLAN IDs in packets.

QinQ mapping is deployed on edge devices of a Metro Ethernet. It is applied in but not limited to the following scenarios:

* VLAN IDs deployed at new sites and old sites conflict, but new sites need to communicate with old sites.
* VLAN IDs planned by each site on the public network conflict. These sites do not need to communicate.
* VLAN IDs on both ends of the public network are asymmetric.

Currently, only 1 to 1 QinQ mapping is supported. When a QinQ mapping-enabled sub-interface receives a single-tagged packet, the sub-interface replaces the VLAN ID in the frame with a specified VLAN ID.

Figure 7-8 QinQ mapping  
![imgDownload?uuid=4402391882494f24bacff41](https://download.huawei.com/mdl/imgDownload?uuid=4402391882494f24bacff41f1955d182.png)  


As shown in [Figure 7-8](https://support.huawei.com/enterprise/en/doc/EDOC1100055122/fbe6cdac/qinq-mapping#fig_dc_vrp_qinq_feature_003501), 1 to 1 QinQ mapping is configured on Sub-interfaces 1 on Switch 2 and Switch 3. If PC1 wants to communicate with PC2:

1. PC1 sends a frame to Switch 1.
2. Upon receipt, Switch 1 adds VLAN ID 10 to the frame, and forwards the frame to Switch 2. After Sub-interface1 on Switch 2 receives the frame with VLAN ID 10, Sub-interface 1 on Switch 2 replaces VLAN ID 10 with carrier VLAN ID 50. Interface 2 on Switch 2 then sends the frame with carrier VLAN ID 50 to the Internet service provider (ISP) network.
3. The ISP network transparently transmits the frame.
4. After Sub-interface 1 on Switch 3 receives the tagged frame from Switch 2, Sub-interface 1 on Switch 3 replaces the carrier VLAN ID 50 with VLAN ID 30.

PC2 communicates with PC1 in a similar manner.

 Comparison Between QinQ Mapping and VLAN Mapping

[Table 7-3](https://support.huawei.com/enterprise/en/doc/EDOC1100055122/fbe6cdac/qinq-mapping#tab_dc_vrp_qinq_feature_003501) describes the comparison between QinQ mapping and VLAN mapping.

Table 7-3 Comparison between QinQ mapping and VLAN mapping



| Mapping Type | Similarity | Difference |
|  |  |  |
| 1 to 1 | An interface maps the tag of a received single-tagged frame to the specified tag. | * QinQ mapping
	+ Performed on a sub-interface
	+ Used for VPLS access
* VLAN mapping
	+ Performed on an interface
	+ Used on Layer 2 networks where VLAN frames are forwarded
 |

  


  


Thanks
dear student,
kindly refer to the links given below for an answer to a similar
query :

https://www meritnation
com/ask-answer/question/graphically-representlongitudinal-wave-transverse-wave/sound/11089393


https://www meritnation
com/ask-answer/question/explain-briefly-about-longitudinal-wave-transverse/sound/9951933

hope this information will clear your doubts about topic
if you have any more doubts just ask here on the forum and our
experts will try to help you out as soon as possible

regards Hi Gunleik\_Groven

In this PDF, para 2.4 you can find all the dimensions you are looking for: [https://www.intel.com/content/dam/support/us/en/documents/boardsandkits/NUC7i5BN\_NUC7i7BN\_TechProdSp...](https://www.intel.com/content/dam/support/us/en/documents/boardsandkits/NUC7i5BN_NUC7i7BN_TechProdSpec.pdf) [https://www.intel.com/content/dam/support/us/en/documents/boardsandkits/NUC7i5BN\_NUC7i7BN\_TechProdSp...](https://www.intel.com/content/dam/support/us/en/documents/boardsandkits/NUC7i5BN_NUC7i7BN_TechProdSpec.pdf)

Under this link you will find all detailed mechanical drawings: <https://www.intel.com/content/www/us/en/support/boards-and-kits/intel-nuc-kits/000006820.html> Mechanical Drawings and Custom Chassis Information for Intel® NUC 

Hope this will help

Leon




[View solution in original post](/t5/Intel-NUCs/Technical-drawing-of-the-NUC7i5BNK-board/m-p/417850#M21995) http://maps.google.com/maps?f=q&source=s\_q&hl=en&geocode=cvxee4idb0hvfs0v8wedujge-q&q=business+type+dinner&sll=32.706133,-117.169576&sspn=0.013379,0.027788&ie=utf8&radius=0.81&filter=0&rq=1&ev=zi&hq=business+type+dinner&hnear=&ll=32.710142,-117.169576&spn=0.013379,0.027788&t=h&z=16 the straight distance between two place on a map can be measured by a strip of paper and divider.use a ruler to measure the distance between the two places. if the line is quite curved, use a string to determine the distance, and then measure the string. find the scale for the map you're going to use. it might be a ruler bar scale or a written scale, in words or numbers. hi roland, the universal gui will ultimately become a fully-fledged alternative to the windows, web and mobile user interfaces. we will make sure that current layouts (with tabs and inline details) in windows and web are also supported in the universal gui, to make the transition as smooth as possible! mapping is the 3rd rail of cad software. most pd's cannot maintain gis files, etc. the best solution i've seen is what we have now. our system uses google maps (browser based) with a system layer over it. so, either it geo codes the address after the call is saved or it uses the lat/long we enter on the geo file in our system. we can also geo code officer alerts to the map. so much easier. we also have browser based maps from our gis analyst that has more parcel info but only dispatchers reference it. best bet is to add a layer over the google map with your boundaries. i actually spoke to my vendor and they are going to add a boundary layer to our stuff as well. it's a good idea. * Use RelativeLayout instead of LinearLayout
* Instead of using your gradient as the background of the main layout container, add a child view, set the height explicitly to the size you want (230dp), and set the background of that view to your gradient.



  




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